High Precision Chilled Mirror Hygrometer – Michell S8000 -100

Chilled mirrors are a fundamental method of moisture measurement.

The sample gas is passed over the mirrored surface which is constantly cooled until the optics module ‘sees’ condensation. This is achieved by shining a laser on the mirror and detecting the intensity of light reflected by the surface.

The temperature of the mirror at that point is a direct measurement of dew point.

No, none of our chilled mirrors are designed for use in hazardous areas due to heating/cooling element in the sensors.

With the addition of a PRT to measure the sample (or environment) temperature, chilled mirrors can also measure the relative humidity. The S8000 Remote and the Optidew are supplied with an external PRT, for the other S8000’s the PRT must be purchased separately.

Annual calibration is recommended for optimal accuracy and performance.

Calibration systems typically include humidity generators, chilled mirror reference hygrometers, and optional compressors or dryers for low dew-point calibrations.

The test chambers are designed to fit most probes and transmitters and there is the option for customizable probe sleeves.

Yes, all our calibration chambers have the option to program calibration cycles.

Both the HygroGen2 and HygroCal100 Advanced come with a relative humidity probe which doubles as a control element and a reference.

Yes, our HG2-S calibration chamber is very often used for on-site humidity and temperature calibrations.

Process Sensing Technologies (PST) offers ISO/IEC 17025 accredited calibration services at several locations.

There is an option for customisable fittings, for large volume calibrations, the transmitter manifolds can be designed specifically for your connection type.

Ideally your dew point transmitters should be calibrated against a chilled mirror which has its own calibration traceable to national standards.