Simplified liquid analysis.

Speeds water quality measurement installation with configurable, pre-engineered designs.

The Rosemount™ 105P Standard Liquid Panel Systems, configurable liquid analysis panel systems designed to reduce project complexity for water quality measurement applications. The pre-engineered panel systems combine Rosemount transmitters, sensors, cables, flow cells and flow control components into a repeatable architecture, simplifying integration and supporting a more streamlined path from specification to start-up with less on-site assembly and labour.

Liquid analysis panel projects are often handled as one-off engineered systems or assembled from loose components, creating added ordering steps, site work and installation variability. The Rosemount 105P panel systems standardise common water quality measurement needs in a configurable system that supports a range of analytical measurements, including pH, oxidation-reduction potential (ORP), dissolved oxygen and chlorine.

By combining Rosemount transmitters, sensors, cables, flow cells and flow control components into one ready-to-install system, the Rosemount 105P helps reduce the cost, time and effort required to specify, order, assemble and commission liquid analysis panels. Its configurable, pre-engineered design enables organisations to standardise deployments and replicate proven panel configurations across sites. Compared with assembling similar systems in the field, the Rosemount 105P can reduce engineering and assembly time by up to 90%, helping teams accelerate project execution while reducing complexity and installation variability.*

“Customers need liquid analysis systems that are easier to configure, order and put into service,” said Peyton Munoz, global product manager for liquid analysis at Emerson. “The Rosemount 105P panel systems give customers a standardised option between loose components and fully custom-engineered panels, helping them standardise common water quality applications while maintaining flexibility for their measurement needs.”

Factory assembly, testing and documentation help create a consistent sample environment that supports reliable measurement performance and reduces variability often associated with field-built systems. By minimising field fabrication, troubleshooting and maintenance complexity, the Rosemount 105P helps organisations significantly lower lifecycle costs while maintaining the water quality insights needed for process performance, compliance and operational efficiency.

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* Based on Emerson internal estimates comparing engineering and assembly of repeat Rosemount 105P panel deployments with comparable field-built liquid analysis panel systems. Actual results may vary depending on application, configuration and site conditions.

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High-Temp., High-Pressure pH/ORP Sensor.

The Rosemount™ 350A High Performance pH/ORP Sensor is designed to deliver reliable measurements in harsh processes while simplifying installation and maintenance through a digital, plug-and-play sensor connection.

“The Rosemount 350A High Performance pH/ORP Sensor is designed to help customers simplify commissioning and improve measurement confidence in tough process conditions,” said Rachel Jang, global product manager, liquid analysis, with Emerson’s measurement instrumentation business. “By combining plug-and-play connectivity with onboard diagnostics and calibration storage, we’re helping teams reduce complexity and spend more time acting on trusted measurements.”

Many demanding pH applications, especially high-temperature, high-pressure and retractable installations, can challenge conventional analogue sensors with signal noise, wiring complexity and limited diagnostic insight. The Rosemount 350A digital sensor addresses these issues by converting and transmitting pH/ORP data digitally, reducing susceptibility to electrical noise and helping teams get to a stable measurement faster.

With a digital Modbus interface and M12 quick-connect cabling, the sensor supports plug-and-play commissioning and can help eliminate common installation errors associated with manual wiring. The digital design also enables interoperability across Rosemount digital liquid analysis sensors, supporting simplified spares and standardisation across sites.

The Rosemount 350A stores calibration data and diagnostic information in the sensor, supporting bench calibration workflows and helping maintenance teams troubleshoot with more context. By capturing sensor health indicators and event history, the sensor can support more proactive maintenance planning and faster root-cause analysis.

Built for harsh applications, the Rosemount 350A supports retractable mounting styles and is offered with titanium body options and selectable reference electrolytes to match challenging process chemistries. These options help improve measurement performance in applications where temperature, pressure, coating or poisoning conditions can shorten sensor life.

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Digital anti-coating pH/ORP sensor.

Maximises sensor life while simplifying Modbus* integration and speeding device changeout.

The new Rosemount™ 396A Anti-Coating pH Sensor for measuring pH and oxidation-reduction potential (ORP) in dirty, abrasive, and high-solids applications has been launched. The device includes a robust anti-coating reference design and Modbus* digital output, minimising sensor maintenance and ensuring a steady pH/ORP signal even when the sensor is coated.

“In high-solids applications, teams need pH and ORP measurements they can trust without constant sensor maintenance,” said Rachel Jang, global product manager, liquid analysis, Emerson. “The Rosemount 396A combines an anti-coating design with digital connectivity to simplify installation and speed up sensor changeout in challenging service situations.”

The digital Rosemount 396A is a drop-in replacement for legacy Rosemount 396P and 396PVP anti-coating sensors, enabling customers to transition to digital technology without changing existing installations or accessories.

It is particularly ideal for difficult processes in chemical manufacturing, oil and gas refining, water and wastewater, and pulp and paper operations where coating and fouling can affect the reliability of pH and ORP measurements.

With digital Modbus* protocol output, the Rosemount 396A supports simplified installation and setup with compatible Rosemount liquid analysis transmitters. Calibration data is stored in the sensor for bench calibration and replacement without field recalibration—helping to reduce commissioning time and service effort.

The Rosemount 396A is rated IP67 and IP68 for protection against water and dust ingress, including submersion, for wet and washdown environments. It includes a through-wall reference junction with increased surface area at the junction for fouling applications.

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* Modbus is a registered trademark of Schneider Electric USA, Inc.

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Analysis sensors future-proofed and IIoT ready!

Process plants typically use a multitude of sensors, each of which is normally connected to a transmitter. Older sensor technologies use analog signals to communicate with transmitters, but more modern models employ digital technology to improve accuracy, ease calibration, simplify troubleshooting, and reduce required maintenance.

Endress+Hauser Memosens technology converts the measured value to a digital signal and transfers it inductively to the transmitter, offering safe data transfer for increased availability of the measuring point and trouble-free operation. With Memosens 2.0, liquid analysis measuring points now become completely future-proofed and ready for IIoT. This new technology is available for pH/ORP, conductivity, and dissolved oxygen sensors—and it will be extended to the complete sensor portfolio for liquid analysis.

Unlocking the potential of measurement data
Memosens 2.0 sensors store numerous relevant data points, such as operating hours, minimum and maximum temperatures, measured values, calibration histories, and load matrices. All this data can be used and processed for comprehensive analysis and more precise process management. The sensors also provide a sound basis for predictive maintenance strategies when used in conjunction with Endress+Hauser’s Heartbeat Technology, along with enhanced IIoT services via the Netilion ecosystem.

Simplifying liquid analysis
The unit combines cutting-edge technology with maximum practicability. Because the Memosens sensors are equipped with highly integrated electronics, they can be calibrated and adjusted under lab conditions that are favorable for the operator, and stable for precise results. Replacing sensors in the field is a simple process and can be performed in a timely manner thanks to the lockable bayonet connector and automatic sensor identification by the transmitter.

Increasing process safety
Non-contact digital data transmission eliminates the effects of moisture, corrosion, and salt bridges—with alert messaging if the signal transmission is disturbed by other factors. Galvanic isolation ensures accurate measurement in the presence of electromagnetic interference and other electrical noise. Memobase Plus software provides full traceability of all sensors used, supporting operation according to the strict guidelines applicable to various regulated industries. Memosens 2.0 offers error-free flexibility for measuring points in hazardous areas because all explosion proof sensors can be connected to all Endress+Hauser transmitters with the same ratings.

Field replacement is simple and quick because Memosens 2.0 sensors are pre-calibrated in the lab, reducing process downtime. Unlike conventional analog sensors, these digital models store calibration data internally, and regular regeneration extends sensor lifetime.

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Analytical transmitter.

The Liquiline compact CM82 transmitter has been announced by Endress + Hauser.

This transmitter accepts pH, ORP, pH/ORP, conductivity, oxygen and chlorine sensor signals from their Memosens® sensor platform. Its housing measures only 11 cm long and 2 cm wide, so even combined with the sensor, it fits into almost every assembly. Although small, it is a fully developed multiparameter transmitter, with access available via 4-20mA HART, or Bluetooth from any iOS or Android device.

Connectable to the CM82 are pH, ORP, pH/ORP, conductivity, oxygen and chlorine sensors with the blue Memosens inductively-coupled plug-in head. The Memosens technology ensures 100% reliable data transmission, with true plug-and-play and pre-calibrated sensors.

When a CM82 measuring point is configured, all settings are saved in the compact CM82 transmitter. In the case of a sensor exchange, the transmitter - and thus the measuring point configuration – can remain in place, with reconfiguration not necessary. In addition, the CM82 reads all sensor and calibration data stored in the head of a Memosens sensor. As a result, the sensor is automatically detected within seconds, and the measurement is immediately ready for use after a sensor change.

As a loop-powered two-wire device, the CM82 can be connected directly to a control component, such as a programmable logic controller (PLC), which also serves as the power supply, thus eliminating the need for a power cable. A cable for the sensor connection is also not necessary because the sensor plugs directly into the transmitter. The measuring point’s required space and wiring effort are thus minimal.

As with all other Endress+Hauser Bluetooth devices, the Liquiline compact CM82 can be operated and configured via the free SmartBlue app, which is available on Google’s Play Store or Apple’s App Store. Using the app, users can see all the measuring points on their tablet or smartphone. Special attention was paid to security: The Bluetooth connection is protected with the same technology that guards identity cards against unauthorized access by third parties. This high security level was confirmed by the German Fraunhofer Institute for Applied and Integrated Security (AISEC).

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Retractable sensor assemblies ensure continuity in process.

The Cleanfit CPA875 and CPA871 sensor assemblies from Endress+Hauser allow pH, ORP, oxygen and NIR sensors to be installed or removed during operation. By moving the sensor from the measuring position to a service position, these retractable assemblies allow the sensor to be cleaned, calibrated or replaced without interrupting the process.

The Cleanfit CPA875 is ideal in applications in the pharmaceutical and food and beverage industry where sensors must be removed for cleaning, calibration or maintenance on a regular basis, while the CPA871 sensor is ideal for applications in the water and wastewater and chemical industries.The retractable assemblies permit removal and installation, while protecting both the process and operating personnel.

In hygienic or sterile processes, the CPA875 assemblies are protected against contamination in accordance with international standards including EHEDG, ASME BPE, FDA, ATEX Directive 94/9/EC, CE/PED, EC VO 1935/2004 and Biological Reactivity (USP Class VI). In pneumatic operating mode, the CPA871 meets ATEX and CE/PED standards.

The CPA875 assemblies, along with their service chambers and process adapters, are certified by EHEDG for cleanability and sterilizability. This certifies that residual media is not only destroyed, but is also removed completely from the service chamber and the sealing surface. The service chamber and sealing surface thus remain free from product residue and microorganisms.

The design of the service chamber allows liquid media to drain freely and completely. The alignment of the inlet and outlet, as well as the flow configuration, ensures that solid built-up deposits are loosened and removed when cleaning. It is also possible to clean and sterilize the seals' contact surfaces. This ensures the sensor is free from contamination when it is reinserted into the process.
The CPA875 assemblies are available with single or dual service chambers. The front chamber in the double-chamber system can also be used as a protective barrier to the process. This chamber can be continually rinsed with water for injection, which ensures the cleaning solution cannot enter the process, even if the process seal is damaged. At the same time, this front chamber can be used to isolate the service chamber temperature from the process. The sensor can therefore be checked, replaced, calibrated, adjusted and cleaned with hot water or sterilized, all without influencing the process.

The Cleanfit CPA875 assembly has seals, process connections and couplings that make it suitable for use in food, pharmaceutical, life sciences and specialty chemical applications, while the CPA871 has similar options for the water/wastewater and general chemical industries. Materials in contact with the process medium are all stainless steel, while seals can be EDPM/FMP or Viton/FFKM, depending on the application. The immersion tube, process connection and service chamber can be stainless steel, titanium, Alloy C22, PEEK or PVDF, again depending on the application.

Both sensor assemblies are available with a manual or an automatic drive. The manual drive has a self-retaining thread to hold the sensor in any intermediate position, and can be used for process pressures up to 116 psi. The pneumatic drive can be used for process pressures up to 232 psi. In assemblies with a pneumatic drive, the service and measuring positions of the sensor are detected and reported to connected monitoring and control systems.

pH/ORP measurement solution.

The SensTation Digital sensor measurement system, a scalable and integrated solution that combines the unique capabilities of the digital SMART sensors and the SMARTDAC+ data acquisition and control system has been announced by Yokogawa. This solution eliminates the need for a transmitter and allows users the choice of any of the paperless recorders in the SMARTDAC+ series, each of which can connect to up to 16 sensors. In addition to supporting a wide range of analytical and data control applications, this solution improves maintenance efficiency.

Development Background
Liquid analyzers are used in the oil, petrochemical, iron and steel, electric power, water supply, wastewater treatment, and many other industries. These analyzers are necessary to control the quality of raw materials and products, monitor reactions, and manage water treatment. Conventional liquid analyzers are composed of a sensor and a transmitter that converts the sensor’s analog signals into digital signals for transmission over communications networks and the real-time display of data.

Data acquisition systems are often used in plants to collect and log data from liquid analyzers. In 2013, Yokogawa released the SENCOM series of SMART pH/ORP sensors, which are able to process digital signals and store calibration data and other types of information in digital form. This eliminates the need for a transmitter and allows direct connections with PCs and other digital devices. Digital SMART sensors with a Modbus RS485communication interface can be connected for use with the SMARTDAC+ recorders.

Key Benefits
1. Easy to maintain
The SensTation system eliminates the need for a transmitter and has a comparatively simple configuration, yet combines the unique and powerful features of Yokogawa’s SENCOM sensors and SMARTDAC+ recorders. Using a SMARTDAC+ recorder and the SPS24 SENCOM PC software, SensTation users are able to remotely monitor sensor and diagnostic data in real time from a PC, smartphone, or tablet device. They can analyze current and historical data and receive automatically generated e-mail messages when a device error has occurred or maintenance is required. Users also have the option of calibrating their SENCOM sensors offline in a laboratory or workshop, where working conditions are optimal.

2. Easy navigation and high flexibility and expandability
SMARTDAC+ recorders have a touch panel user interface similar to that found in the latest tablets and smartphones. This means that users will find the navigation familiar, intuitive, and easy. And unlike conventional transmitters that have a limited number of input/output terminals, SMARTDAC+ offers users a range of I/O modules to choose from, ensuring that they can connect to and have a detailed, real-time overview of all the sensors at a particular site. The SMARTDAC+ GX20 and GP20 recorders, both of which come with a large touch panel, can accommodate up to 10 modules and 100 I/O channels, and the GX10 and GP10, which have a smaller touch panel, can accommodate up to 3 modules and 30 channels. The SMARTDAC+ recorders support a number of widely used network protocols, ensuring smooth integration with SCADA software, PLCs, and distributed control systems.

Major Target Markets
Process industries such as oil, petrochemicals, iron and steel, electric power, and water supply and wastewater treatment

Applications
-Monitoring the quality of treated wastewater and neutralized water
-Metal treatment bath monitoring
-Controlling the concentrations of liquid infusion systems

pH/ORP measurement.

A scalable, integrated system that improves maintenance efficiency

The SensTation pH/ORP measurement system from Yokogawa, is a scalable and integrated solution that combines the unique capabilities of the SENCOM pH/ORP sensors and the SMARTDAC+ data acquisition and control system. This solution eliminates the need for a pH/ORP transmitter and allows users the choice of any of the paperless recorders in the SMARTDAC+ series, each of which can connect to up to 16 sensors. In addition to supporting a wide range of analytical and data control applications, this solution improves maintenance efficiency.

Development background

Liquid analysers are used in the oil, petrochemical, iron and steel, electric power, water supply, wastewater treatment, and many other industries. These analysers are necessary to control the quality of raw materials and products, monitor reactions, and manage water treatment. Conventional liquid analysers are composed of a sensor and a transmitter that converts the sensor's analogue signals into digital signals for transmission over communications networks and the real-time display of data.

Data acquisition systems are often used in plants to collect and log data from liquid analysers. In 2013, Yokogawa released the SENCOM series of pH/ORP sensors, which are able to process digital signals and store calibration data and other types of information in digital form. This eliminates the need for a transmitter and allows direct connections with PCs and other digital devices. SENCOM sensors come with a communication interface and custom-made pH/ORP display templates for use with the SMARTDAC+ recorders. 

Key benefits

1. Easy to maintain

The SensTation system eliminates the need for a transmitter and has a comparatively simple configuration, yet combines the unique and powerful features of Yokogawa's SENCOM sensors and SMARTDAC+ recorders. Using a SMARTDAC+ recorder and the SPS24 SENCOM PC software, SensTation users are able to remotely monitor sensor and diagnostic data in real time from a PC, smartphone, or tablet device. They can analyse current and historical data and receive automatically generated e-mail messages when a device error has occurred or maintenance is required. Users also have the option of calibrating their SENCOM sensors offline in a laboratory or workshop, where working conditions are optimal. 

2. Easy navigation and high flexibility and expandability

SMARTDAC+ recorders have a touch panel user interface similar to that found in the latest tablets and smartphones. This means that users will find the navigation familiar, intuitive, and easy. And unlike conventional transmitters that have a limited number of input/output terminals, SMARTDAC+ offers users a range of I/O modules to choose from, ensuring that they can connect to and have a detailed, real-time overview of all the sensors at a particular site. The SMARTDAC+ GX20 and GP20 recorders, both of which come with a large touch panel, can accommodate up to ten modules and 100 I/O channels, and the GX10 and GP10, which have a smaller touch panel, can accommodate up to three modules and 30 channels. The SMARTDAC+ recorders support a number of widely used network protocols, ensuring smooth integration with SCADA software, PLCs, and distributed control systems.

What's in a name?

SENCOM takes its name from the phrase "SENsors with COMmunication", which emphasises the data storage capability of these sensors. Yokogawa Electric Corporation and its subsidiary Yokogawa Europe B.V. (headquartered in the Netherlands), have jointly developed the SENCOM platform to increase maintenance efficiency and reduce cost of ownership for their customers. The SENCOM sensor can store digital data and be calibrated using the SPS24 SENCOM PC software and/or the FLXA21 analyser.

Applications

- Monitoring the quality of treated wastewater and neutralised water

- Metal treatment bath monitoring

- Controlling the concentrations of liquid infusion systems

Major target markets

Process industries such as oil, petrochemicals, iron and steel, electric power, and water supply and wastewater treatment

Digital pH/ORP sensor & PC software products for enhanced maintenance efficiency

Yokogawa has just released the new SENCOM* platform product series for the digital measurement of pH and ORP. This will join an existing lineup of quality pH/ORP solutions that includes the FLXA21 two-wire pH/ORP-transmitter. With the release of the SENCOM platform products, they bring pH and ORP measurement into the digital era.

The SENCOM platform initially consists of a SENCOM module, the FU20F pH/ORP SENCOM sensor, a SENCOM cable, and the SPS24 SENCOM PC software. The installation of a SENCOM module in an FLXA21 transmitter will give it the powerful digital signal processing capabilities required to work together with the new SENCOM sensors.

Configuration

Like its predecessor, the FU20F pH/ORP SENCOM sensor is a general purpose sensor that is suitable for a wide range of applications. The FU20F can store digital data and be calibrated using the SPS24 SENCOM PC software and/or the FLXA21. With these SENCOM platform products, our customers will be able to reduce the amount of maintenance work that needs to be performed on-site, thereby improving efficiency and reducing costs.

The target market is the process industries such as oil, petrochemicals, iron and steel, electric power, and water supply and wastewater treatment. with applications such as Monitoring the quality of treated wastewater and neutralised water and controlling the concentrations of liquid infusion systems

Development Background
Liquid analysers are used in the oil, petrochemical, iron and steel, electric power, and water supply and wastewater treatment industries to control the quality of raw materials and products, monitor reactions, and manage the wastewater treatment process. The properties of certain solutions may cause damage to or foul the sensors in these analysers and thus adversely affect measurement accuracy, so sensor calibration is required on a regular basis. However, conditions vary and it is not always safe or convenient to perform the calibration work on-site, which usually requires a converter to store data and the use of standard calibration solutions. There is a need to move this work to a safer location and also reduce measurement downtime.

Masatoshi Nakahara, Senior Vice President of the Industrial Automation Platform Business Headquarters, said, “To improve quality and production efficiency at our customers’ plants, it is crucial not only to improve plant facilities but also to keep measuring instruments in optimal condition for long-term stable operation. The newly developed digital SENCOM sensor will help customers improve maintenance efficiency and reduce costs. As part of our VigilantPlant initiative, Yokogawa will continue to develop and offer solutions that help its customers achieve the ideal plant.”

Product Features
1. Better working conditions / reduced measurement downtime
The FU20F pH/ORP SENCOM sensor is able to process digital signals and store digital information, including calibration data. Using either the SPS24 PC software or an FLXA21 transmitter, it can do offline calibration of these sensors in a laboratory, where working conditions are optimal. In addition, the ability to swap out the FU20F and replace it with a calibrated sensor on site will significantly reduce measurement downtime.

2. Quick and efficient calibration
With the SPS24 software, it will be possible to simultaneously calibrate up to four SENCOM sensors, significantly shortening calibration time.

3. Efficient data management
The SPS24 software features an integrated database capable of storing data for up to 100 SENCOM sensors. This enables predictive maintenance, allowing service staff to identify when sensor maintenance and/or replacement is required. In addition, there is no longer the need to go on-site to obtain the data stored on a converter.

*“SENCOM” comes from the phrase “SENsors with COMmunication,” which emphasises the data storage capability of these sensors. Yokogawa Electric Corporation and its subsidiary Yokogawa Europe B.V. (headquartered in the Netherlands), have jointly developed the SENCOM platform for their customers to increase maintenance efficiency and reduce cost of ownership.
Following the introduction of the FU20F, which is the first sensor to be offered based on the SENCOM platform, Yokogawa will expand the SENCOM series lineup by adding products that support four-wire liquid analysers and thereby widen the scope of measurement.

Self-contained digital pH and ORP measurement!

Yokogawa has combined its expertise in pH and ORP sensor technology with integrated digital communications and signal-processing circuitry to produce the SENCOM (SENsor COMmunication) range of self-contained smart sensing solutions.

The SENCOM smart sensor design enables improved maintenance management and diagnostics, further enhancing the simplicity and reliability that Yokogawa is renowned for. In addition, SENCOM has its own permanent calibration memory, allowing it to be calibrated in the laboratory before returning it to the field, resulting in improved accuracy with reduced operating costs, shorter downtime, and improved safety.

These sensors maintain specific measurement and calibration data and this information can be exchanged between the sensor and a transmitter such as Yokogawa’s FLEXA family. Dedicated SENCOM SPS24 management software is also available for use with a Windows PC. Utilising historical measurement, calibration and diagnostic data from the sensor, the SPS24 data management system provides users with the tools necessary to predict maintenance and calibration frequency and estimate sensor life. The calibration information can be managed, analysed and conveniently documented by the SENCOM SPS24 software.

This new sensing approach enables simplified maintenance by the replacement of “pre-calibrated” sensors. Furthermore, it is possible to monitor sensor aging in real time using a sensor “wellness” feature, as well as carrying out reference impedance measurements for the early detection of diaphragm clogging.

The new software makes it possible to optimise the performance of pH/ORP sensors for enhanced reliability and process safety. The software allows the operator to continuously monitor pH/ORP sensor measurements, perform calibrations and configure the various parameters, keeping track of up to 100 different SENCOM sensors.

The first SENCOM sensor to be introduced in Yokogawa’s new family is a pH/ORP sensor, targeting applications requiring easy, accurate and reliable measurements. Future sensors will target the full spectrum of pH and ORP applications in the power, utilities, petro-chemical, chemical and pulp & paper industries. The new SENCOM sensors are designed to deliver new levels of accuracy and reliability even in the harshest of industrial environments.

New portable water quality profilers

Xylem Analytics has announced the launch of a new range of portable multiparameter water quality meters that have been designed for spot measurements and profiling of pH, ORP, conductivity, temperature, depth and optical dissolved oxygen, in both marine and freshwater applications.

The new WTW MPP 900 IDS Multiparameter Sondes are able to take measurements at depths of up to 100m because of the IDS (intelligent digital sensors) technology which means that sensor output is converted to a digital signal within the sensors, so that data can be transmitted for longer distances without interference.

A further advantage of the IDS technology is that each sensor has its own identity which is recognised immediately by the meter when connected. In addition, calibration history is stored in the sensor which helps to further reduce any potential for error, and enables users to quickly switch sensors when necessary. Reinforced cables are available in lengths between 1.5m and 100m.

There are two versions of the new meter, both with a built-in depth sensor. The MPP 910 IDS has a single sensor port and the MPP 930 IDS has three sensor ports. All sensors also measure temperature and are used with the rugged Multi 3430 handheld meter.

Sales and Marketing Director Darren Hanson says: “The MPP900 instruments are an exciting addition to the range of portable water quality monitors offered by Xylem Analytics; with a built-in depth monitor and digital sensors the MPP900 is ideal for limnology and represents a lower cost alternative to the EXO multiparameter water quality logging sondes.”

Liquid analyser supports dual sensors

Yokogawa's FLXA21 measures ph/ORP, inductive and contacting conductivity, and dissolved oxygen

The new Yokogawa FLXA21 is the latest generation of the company's range of liquid analysers designed for continuous on-line measurements in industrial installations.

The new instrument is a modular 2-wire liquid analyser that supports the use of up to two sensors and can be flexibly configured to measure several different liquid properties including pH/ORP, contacting conductivity, inductive conductivity and dissolved oxygen.

It also incorporates a number of advanced features including a touch screen for ease of operation, sensor self-diagnostics, maintenance time estimation, 12 language display options, and a range of digital communications interfaces.

The ability of the unit to support up to two sensors of the same type helps to reduce installation and maintenance costs and save space, in addition to enabling the configuration of a highly reliable backup system with interruption-free measurement assured even during maintenance.

Its  modular design offers a high degree of 'scalability' and enables the construction of a variety of systems. System changeover can be accomplished quickly and easily by replacing and adding modules, and users can select the case material (plastic or stainless steel).

The interactive touch display provides on-screen guidance messages to make setup quick and easy. In the event of an error, the screen displays an error code and indicates the corrective action to be taken. Several different display modes are available, and prompts and other messages eliminate the need to consult the instruction manual.

Sensor self-diagnostics capabilities are provided via continuous measurement of sensor impedance, asymmetric potential and slope, as well as continuous monitoring for electrode contamination, damage, burnout and decline in measurement liquid level. A display of sensor status includes the latest five calibration results along with an estimate of the future maintenance and calibration times.

The FLXA21 can be used with a wide variety of pH/ORP, contacting conductivity, inductive conductivity, and dissolved oxygen sensors.

Digital communications options include HART, FOUNDATION™ fieldbus and Profibus.

pH/ORP sensors meet a broad range of applications

Rugged Rosemount® Analytical Model 3900 sensor features a wide temperature operating range, versatile mounting options, and advanced diagnostics

Emerson’s Rosemount^® Analytical Model 3900 general purpose pH/ORP sensor

Emerson Process Management has released the Rosemount® Analytical Model 3900 general purpose pH/ORP sensor, designed to meet the broadest range of applications in the industry. Offering the widest temperature operating range of any general purpose sensor, the Model 3900 is the first to function at sub-zero temperatures, providing accurate measurements in applications from -10°C to 100°C. Each sensor is equipped for both ¾ inch and 1 inch mounting, allowing it to fit in smaller pipes, giving optimum mounting versatility in insertion, submersion and flow-through applications.

The Model 3900 features the patented AccuGlass™ sensor glass formulation which has been field-proven in premium sensors designed for rugged environments. The AccuGlass formulation exceeds industry standards and resists cracking. In addition, a unique Teflon double-junction reference electrode protects the sensor from poisoning ions. The complete encapsulation of the sensor eliminates leakage or high humidity problems found in other pH/ORP sensors.

The Model 3900 gives the user access to a wider range of more advanced diagnostics. In addition to glass diagnostics, a stainless steel solution ground allows reference diagnostics, simplifying maintenance and scheduling. The solution ground also reduces noise, makes for a highly stable measurement, and makes internal temperature compensation respond more quickly than with previous generation solutions.

The Model 3900 is a combination sensor including pH, ORP and temperature within the sensor body. It is designed to measure aqueous solutions in pipelines, open tanks or ponds. The sensor is compatible with all Rosemount Analytical analysers as well as those from other manufacturers.