Humidity and Temperature Transmitter Series HMW90

±1.7%RH wall transmitters with a certificate for demanding HVAC

5 year warranty HVAC devices

Typical applications include museums and archives, production and warehouse facilities, data centers, laboratories, and testing environments. 5-year warranty is valid for instruments purchased in 2021 and beyond.

The HMW90 series measures relative humidity and temperature in indoor environments, where high accuracy, stability, and reliable operation are required. The HMW90 is a flexible product family with a variety of options and features, both analog and digital output models are available. The sensors are exceptionally easy to configuration, install, and adjust in the field. Calculated humidity parameters (Td, x, h, Tw, a, T-Td).

The following models are available:

  • TMW92 T transmitter, current output
  • TMW93 T transmitter, voltage output
  • HMW92(D) RH+T transmitter, current output (with display)
  • HMW93(D) RH+T transmitter, voltage output (with display)
  • HMW95(D) RH+T transmitter (with display), Modbus RTU communication
  • TMW90 T transmitter, configurable analog output model 
  • HMW90 RH+T transmitter, configurable analog/digital model 

The HMW90 and TMW90 transmitters are available in two color options: standard white and black.

View all our instruments for HVAC applications.

Click here to download bid specs for USA.


  • Analog and digital outputs
  • Easy installation, configuration, and field adjustment
  • Humidity parameter options: relative humidity, dew point, mixing ratio, enthalpy, wet bulb temperature, dew point depression, and absolute humidity
  • Full 0 … 100%RH measurement range
  • Accuracy up to ±1.7%RH
  • User exchangeable humidity and temperature module
  • Traceable calibration, certificate included
  • Available in two colors

Key benefits

Two output choices

Both analog and digital output models available.

Easy to use

Exceptionally easy configuration, installation, and field adjustment.

Easy maintenance

Field exchangeable measurement modules for easy maintenance.

Product Resources