Item # HG-1, HG-1 Portable Humidity Calibrators on Michell Instruments, Inc. Michell Instruments, Inc. - Item # HG-1, HG-1 Portable Humidity Calibrators
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All Categories > Moisture Calibration Instruments > HG-1 Portable Humidity Calibrators > Item # HG-1  
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HG-1 Portable Humidity Calibrators
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The HG-1 is a high precision, portable humidity calibrator. Using Michell's Optidew Chilled Mirror instrument as the reference measuring instrument, humidity can be controlled across the range 2 to 95% RH (at room ambient operating temperature). The HG1 is configured to operate as a standalone calibrator or to operate from a dry compressed air supply enabling easy on-site calibrations. The front panel mounted flow-meters enable the mixing ratio of a dry and wet air stream to generate the required humidity. The chamber cover can be customized to suit the transmitters and sensors being calibrated.

HG-1 Portable Humidity Calibrators

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HG-1 Portable Humidity Calibrators-2

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Specifications

Calibration Range

2 to 90% RH at room ambient temperature (-30 to +20ºC dew point (-22 to +68ºF))

Accuracy

Typically ±2% of reading (% relative humidity), 0.2ºC dew point (0.36ºF), 0.1ºC (0.18ºF) ambient temperature (with Optidew reference hygrometer)

Calibration

Through certified calibration of integrated Traceability Optidew reference hygrometer, to NPL and NIST

Ambient Operating Temperature1

10 to 35 ºC
50 to 95 ºF

Power

110 V or 240 V, 50 - 60 Hz, 60 V·A

Calibration Chamber Material

Steel with gasket seal

Calibration Chamber (W x H x D)

120 x 120 x 250 mm
4.7 x 4.7 x 9.8 in

Case Material

Painted aluminum

Overall Dimensions (W x H x D)

520 x 305 x 400 mm
20.5 x 12 x 15.7 in

Zero Stability

±0.25% of span per month

Span Stability

±0.25% of span per month

Sample Flow Rate

0.4 l/min for the sensor cell (0.85 scfh)

Pressure

Atmospheric to Maximum of 3 bar (43.5 psi)

Approx. Weight

20 kg
44 lb
1 Temperature control of the measurement chamber can be specified as an option.


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