Chilled Mirror


Chilled MirrorMichell’s Chilled Mirror Dew Point Meters are precision instruments for critical measurement and control applications. The fundamental nature of this method means that Chilled Mirror instruments can be used as either extremely reliable and stable field instruments or as laboratory reference standards for the calibration of other devices. Michell's Chilled Mirror Sensors are fundamental in their method of operation.

A miniature polished stainless steel mirror is cooled by a solid plate Peltier thermoelectric heat pump until it reaches the dewpoint of the gas under test. When this temperature has been reached, condensation will begin to form on the mirror surface. An electro-optical loop detects that condensation is forming, by a reduction in the intensity of light reflected from the mirror surface and through the control electronics of the chilled mirror instrument. This modulates the cooling power applied to the Peltier.

The mirror surface is then controlled in an equilibrium state whereby evaporation and condensation are occurring at the same rate. In this condition the temperature of the mirror (measured by a platinum resistance thermometer) is equal to the dew point temperature of the gas.

S8000 RS S8000 RS
The chilled mirror sensor directly measures the formation of condensation, giving long-term and unmatched, drift-free readings of...
S8000 Remote S8000 Remote
A hygrometer offering a combination of a market-leading ±0.1°C (±0.18°F) accuracy with the flexibility of a remote sensor..

S8000 Integrale S8000 Integrale
The new S8000 Integrale continues Michell’s tradition of excellence in the design of high...
S4000 Remote S4000 Remote
The S4000 Remote is a precision laboratory dew point hygrometer with the ultimate accuracy,...
S4000 RS and TRS S4000 RS and TRS
The precision S4000 Chilled Mirror Dewpointmeters offer unmatched accuracy and reliability in dew...
Optidew Optidew
The Optidew high performance optical dew point transmitter is based on the proven, fundamental...
Optidew Vision Optidew Vision
The Optidew Vision precision dew point meter is based on the proven, fundamental optical dew...