Model ELH Calibration Chambers: %RH, Dew Point, Temperature - DESCRIPTION 
by EdgeTech Instruments

The Edgetech Instruments Model ELH Series is a series of precision humidity chambers, with NIST traceable accuracies in humidity (±0.5% typical), temperature (±0.1°C) and dew point (±0.2°C).  The ELH Series consist of a programmable controller for constant precision control and uniformity, and an integrated DewMaster chilled mirror hygrometer for accurate temperature and humidity measurements. 

The ELH series offers three standard chamber sizes: 1.5cu.ft., 6cu.ft. and 10cu.ft.  Larger volume chambers are also available.

All chambers use an environmentally safe non-depleting refrigerant.