The Dwyer HS Humidity Switch provides control for humidifying or dehumidifying systems. Relative humidity, output status, and error messaging can be viewed on the bright green LED. Access to programming parameters can be locked for security using password protection.

Applications include industrial chillers, environmental chambers, walk-ins and freezers, heat sealers, beer and wine chillers, mug frosters, coolers, display cases, meat and produce storage, floral preservation, refrigerated transportation, laboratories, food service equipment, ovens and dryers, greenhouses, museums, tobacco preservation, and duct humidity monitoring. Features include parameter protection, 4-20 mA or 3V input selection, and 10-100% RH range.