Michell Instruments XZR500 Specifications

XZR500

Oxygen Analyzers

Combustion Control Analyzer

The XZR500 oxygen analyzer from Michell Instruments determines the excess air required for
optimum efficiency in industrial combustion processes. It uses innovative, sealed-reference
zirconium oxide technology to measure levels of oxygen in harsh conditions such as boilers,
incinerators and furnaces. It provides fast, accurate and reliable readings in the most difficult
environments.

Highlights

• Innovative, Metallic Sealed Reference Sensor
provides reliable and repeatable measurements
with low maintenance

• Simple air calibration reduces cost of ownership

• Robust design maximizes sensor life

• Flexible installation reduces retrofitting and

start-up costs

• Advanced design is easy to operate and
maintain

• No chance of thermal shock to sample cell

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Applications

Control combustion efficiency and monitor
emissions of:

• Boilers

• Industrial and waste incinerators

• Coal-fired power plants

• Petrochemical furnaces

• Annealing and galvanizing furnaces

• Soaking pits

• Glass and melting furnaces

• Cement kilns

• Crematoria

Oxygen Analyzers

Michell XZR500

Combustion Control Analyzer

The XZR500 measures levels of oxygen in combustion processes
and flue gases to help maintain the optimum level of combustion
efficiency. Accurate control of combustion efficiency is critical for
optimal fuel usage and reducing plant operating cost.

The XZR500 flue gas analyzer can be located close to the gas
stream, further reducing costs. Due to its unique design the
sensor is protected from damaging conditions, providing long
life in difficult environments.

Michell Instruments has over 30 years’ experience developing
high performance instrumentation capable of operating in
extreme conditions. Our customers benefit from our knowledge
of oxygen measurement at high temperatures and in corrosive,
acidic gases.

Benefits

Easy to service and virtually maintenance free, the XZR500
provides the following benefits:

Reliable and repeatable measurements

Innovative, Metallic Sealed Reference Sensor (MSRS) technology
is resistant to contamination and virtually drift free, resulting in
extended calibration intervals. These reduce maintenance, which
is extremely beneficial where measurement point locations are
difficult to access.

Easy to calibrate

The MSRS of the XZR500 allows the use of dry air as a single
calibration gas for most applications. Expensive calibration gases
are not needed. Auto calibration is available as an option.

Quick and easy to install in almost any location

The compact XZR500 can be installed in almost any location. It
can be used with most flange types to replace other analyzers
without expensive retrofitting. Insertion probes are available
in special lengths on request and can be supplied in a range
of materials including Inconel, ceramic and others to suit
application needs.

Simple to use

The analyzer is easy to operate with intuitive, menu-driven
software to select and adjust parameters.

Easy to maintain

For high-dust applications including coal-fired power stations,
the XZR500 features a highly efficient blow-back system to clear
the insertion probe of debris, further reducing maintenance.

Close-Coupled Extractive

The sensor is located in an oven inside the sensor head
bolted directly to the flue/stack. Unlike in-situ analysers the
sensor is not in the probe this ensures a longer life, greater
accuracy and no chance of thermal shock damaging the sensor.

which is

No need for aspirator or reference air:

The sample is drawn into the sensor via a Pitot effect created in
the sample probe and vented back into the stack. This means
there is no need for an aspirator (eductor) air supply saving
ongoing cost. There are no utilities required to operate the
analyser (unless the back flush option is required for extremely
dusty applications).

Marine Auxilary Boiler

Probe Selection:

Due to the modular construction of the XZR500 it is possible to
offer a range of probes to suit a variety of applications. There
is a choice of 3 lengths 0.4m (1.3’), 0.6m (1.9’) & 0.9m (2.9’)
as well as 6 different materials including 304L stainless steel for
low temperature easy applications, alloys for corrosive samples
and ceramic for temperatures up to 1300°C (2372°F).

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