The RHT-DM transmitters incorporate the best high accuracy and great stability relative humidity and temperature sensors. They convert the measured values into linear 4 to 20 mA signals. The microprocessor based circuit enables full configuration of output range when used with the TxConfig PC interface and the Windows® based software. The humidity signal can be configured to either relative humidity or dew point output. The RHT-DM version is suitable for duct and through-the-wall applications.

Features & Specifications:

• Humidity Accuracy: Refer to Figure 01 above
• Humidity Repeatability: ± 1 % RH
• Humidity Non-linearity: < 1 % RH
• Humidity Stability: < 1 % RH / year
• Humidity Span: 0 and 100 % RH or -100 and 103 ºC for dew point
• Humidity Response time: 4 seconds in slow moving air (63 %)
• Temperature Accuracy: Refer to Figure on left
• Temperature Repeatability: ±0.1 ºC
• Temperature Response time: up to 30 seconds in slow moving air (63 %)
• Power supply: 12 Vdc to 30 Vdc (4-20 mA model)
• Outputs: 4-20 mA or 20-4 mA current, 2-wire loop power supply 
• Output Load (RL): 4-20 mA output: RL (Ohms max.) = (Vdc – 12) / 0.02 let Vdc = Loop power supply (12 to 30 Vdc). 
• Channel isolation: the 4-20 mA outputs are isolated
• Reverse polarity protection: YES
• Protection: Electronic circuit case: IP65; Sensors capsule: IP40
• Operating limits: Sensor and probe (RHT/DM): see Figure 01
• Electronic circuit: -10 to +65 °C, 0 to 95 % RH.
• Configured via TXConfig & USB interface - TXConfig USB is required to program or reprogram the units