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Humidity and temperature controller - TW420 series
The Liebert TW420 and THW420 are sensors that will review data center monitoring controls by reviewing temperatures and humidity levels and then transmits the data on a 4-20 mA output onto the Liebert Universal Monitor. These two models will get inputs out and will use different units. The TW420 is wall-mounted and uses a 4-20mA signal that runs from 45 to 96 Fahrenheit or 7 to 35 Celsius. The THW420 has many similar features but it adds a humidity sensor to add to the overall condition analysis that may be used at a time. This can work for any level of relative humidity.