XZR250 User’s Manual
Michell Instruments
1
PRODUCT OVERVIEW
1
PRODUCT OVERVIEW
The XZR250 is a pressure compensated oxygen analyser designed to monitor the oxygen
concentration of the gas during combustion in boilers and industrial furnaces.
The XZR250 is designed to allow direct installation of the probe in the wall of a flue or
furnace to measure the concentration of oxygen in the stack gas with temperatures up to
700°C. The sensor is located in the sensor head and not the probe, this ensures a more
stable measurement and longer sensor life.
The XZR250 uses a zirconium oxide (ZrO
2
) sensor which should last for up to 7 years in
natural gas fired boilers. It can be replaced without the need to remove the probe from
its installation.
Single-point calibration can be simply performed using fresh air or a known reference gas.
1.1
Components
1. Sensor Head
2. Clamp
3. Mounting flange
4. Probe body
5. Gas sampling tubes
6. Gasket (see figure 8)
Figure 1
Main Components
The instrument is supplied with a quick start guide, however this full manual should be
read carefully before work commences:
XZR250 97529 Quick Start Guide.
