Michell Instruments has announced the launch of the XZR250 oxygen analyzer for monitoring combustion control in
industrial boilers. It was developed to meet customer demand for a cost-effective,
easy to operate instrument with a probe designed to cope with the high
temperatures in the flue. Effective combustion control has growing importance
for operators as it not only helps increase fuel efficiency but also ensures
compliance with legislation on allowable emissions.
The XZR250 uses a zirconium-oxide sensor with a life span of up to seven years
(depending on the fuel used) to maintenance to a minimum. A key benefit of the sensor is its fast response of less than
fifteen seconds to changes in oxygen concentrations of 90% of the range. It is
also accurate to less than 0.25% O2 allowing optimum combustion control.
The instrument is easy to install as it requires no specialised tools, it
is also very light to handle and has a fast start-up routine. The probe can be inserted directly into boilers up to 700°C and
uses the Pitot effect to ensure the sample gas is sufficiently cooled to
protect the sensor from damage without the need for complex sample
conditioning. As with any
process instrument, regular calibration is necessary to ensure the accuracy of
the measurements. It can use air as a calibration gas, making
calibration highly cost effective and simple to perform.
The robust sensor ensures maintenance is minimal, but when it does need
replacing, this can be done with minimal process downtime. The company has extended
its popular sensor exchange programme for dew-point transmitters to customers
of the XZR250. Under this scheme, operators order a new sensor block from
Michell, which arrives ready to fit. Once fitted, the old sensor block can be
returned in the same box and the customer receives a credit.
Typical applications for the XZR250 include oil, gas and biomass
boilers.
• Michell products are marketed in Ireland through Instrument Technology.
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