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.

Product Features

  • 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

Technical Specification

Sensor Type
Measurement Principle Zirconium oxide sensor with metallic sealed reference and K Type T/C
Gas Requirements Typical exhaust gas
Measurement Range 0.01 to 25% Oxygen
Accuracy Better than ± 2% of reading
Response Time (T90) 20 seconds
Repeatability ± 0.1% of reading
Stability 1% per month
Linearity Better than ±1% of reading
Sample Flow Rate Flue Gas at 0.5m/s (17.65 ft/s) minimum rate
Maximum Sample Pressure Application dependent
Maximum Sample Temperature +1300°C (+2372°F) (see probe selection in Wetted Materials)
Output Signal One 0/4-20 mA linear, with isolated output
2nd output optional
Output Load Over 1000 Ω
Self-diagnostics Includes: oven under temperature; thermocouple separation; calibration fail; EEPROM corruption
(Diagnostic information displayed on panel meter)
Output Ranges Configurable between 0.01 to 25%
Alarms 2 Alarms; User-adjustable (10 W)
1 Fault Alarm
Display Resolution 0.1% in standard
(0.01% on request)
Power Supply 110V (100 to 120) 50-60 Hz or 220 V (190 to 240) 50 Hz
Power Consumption 110 V A
Ambient Temperature Range 0 to +55°C (+32 to 131°F)
Sensor Temperature +700°C (+1292°F)
Operating Humidity 5 to 90% RH non-condensing
   Control unit: 300 x 300 x 200mm (11.8 x 11.8 x 7.8 inches)
   Sensor: 290 x 135 x 650mm (11.4 x 5.3 x 25.6 inches)
Weight 10 to 15 kg (22 to 33 lbs) depending on configuration
Wetted Materials 304 L Stainless steel (700°C (1292°F))
Inconel 600 (1000°C (1832°F))
HR160 (600°C to 1000°C (1112°F to 1832°F))
C2000 (600°C (1112°F))
Halar coating (120°C (248°F))
Ceramic (1300°C (2372°F))
Probe Lengths 0.4, 0.6 and 0.9m (15.75, 23.62, 35.43 in)
Installation Stack and wall-mount
Housing Ingress Protection Weather proof enclosure to sensor: IP53
Control unit: IP52

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