HG-1 Humidity Calibrator

A low-cost, easy to use, fully integrated system for the calibration of dew-point and relative humidity sensors from 2 to 90% relative humidity, -30 to +20°Cdp (-22 to +68°Fdp). The HG1 is configured to operate as a stand alone calibrator or to operate from a dry compressed air supply enabling easy on-site calibrations. The calibrator features an integrated chilled mirror reference instrument to enable the operator to perform calibrations that are traceable to national standards. The chamber cover can be customised to suit the transmitters and sensors being calibrated.

Product Features

• Simple operation and maintenance
• Range 2 to 90% RH, -30 to +20°Cdp (-22 to +68°Fdp)
• Built in precision chilled mirror reference instrument
• Reference accuracy ±0.2°Cdp (±0.36°Fdp)
• Transportable to allow on-site calibrations

Technical Specification

Calibration range	2 to 90% RH at room ambient temperature (-30 to +20°C dew point (-22 to +68°F)
Reference accuracy	Typically ±2% of reading (% relative humidity), 0.2°C dew point (0.36°F), 0.1°C (0.18°F) ambient temperature (with Optidew reference hygrometer)
Calibration	Through certified calibration of integrated Optidew reference hygrometer, to NPL and NIST
Operating temperature	+10 to +35°C ambient (+50 to +95°F)
Power	110 V or 240 V, 50 - 60 Hz, 60 VA
Calibration chamber	Steel with gasket seal, 120 x 120 x 250mm (WxHxD) (4.7 x 4.7 x 9.8 inches)
Overall dimensions	Painted aluminium case, 520 x 305 x 400mm (WxHxD) 20.5 x 12 x 15.7 inches
Sample flow rate	0.4 l/min for the sensor cell (0.85 scfh)
Weight	20kg approx (44 lb)

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