 The zirconium oxide sensor
utilized in our XZR-500 and XZR-400 ranges of Oxygen Analyzers is one of the most
advanced sensors commercially available for measuring oxygen concentration.
Unlike conventional zirconia sensors, which are often known as ‘air
reference sensors’, the Michell Oxygen Sensor is based on patented
technologie, with its own metallic sealed reference. Using these Metallic Sealed
Reference Sensors (MSRS) means that the XZR-400 and XZR-500 provide precise and
fast oxygen measurements over a long period of time and without the need for
reference gas. The sealed, inert reference of the sensor means that the
instruments are virtually drift-free and will provide reliable and repeatable
results.
Typically, traditional zirconium oxide sensors are based on
the Nernst principle (W.H. Nernst, 1864-1941). These sensors use zirconium
oxide as a solid state electrolyte. The probe is plated on opposing sides with
platinum serving as electrodes. At high temperature, zirconia allows migration
of oxygen ions so that when exposed to gases at different partial pressure
levels an electrochemical voltage is generated between the platinum electrodes.
The zirconium oxide principle, combined with the miniature size of the
Michell MSRS, allows extremely fast response times. Originally developed for
analyzing levels of oxygen in the ultra-harsh environment within volcanoes,
Michell’s XZR-500 flue gas analyzer is well-suited for use in applications
with conditions of extreme heat, such as combustion and waste incineration. The
sealed reference design makes the Michell sensor insensitive to thermal shocks
and dramatically increases its lifetime, as well as reducing the need for
calibration, when compared to open reference sensors which require a source of
instrument air. |
 |
XZR-400 Series
The XZR400 oxygen
analyzer detects trace oxygen in gas and is used to control the purity
of... |
 |
XZR-500 Series
The XZR500 oxygen
sensor from Michell Instruments is designed to determine the excess of
air... |
|
|
