relative dew-point transmitter / duct-mount / with temperature measurement

The DELTA OHM HD48 / HD49 series transmitters are a perfect temperature, humidity and dew point measurement devices. They feature standard analog or RS485 output with MODBUS‑RTU protocol, whereas the analog output offers signals for transmission to a remote display, recorded or PLC, while the RS485 output models are more suitable for PC and PLC connectivity. The HD48 models are active transmitters and can receive both direct and 24 V AC alternating power supply, with the standard current from 4 to 20 mA and voltage from 0 to 10 V, or via serial RS485, depending on the version. The HD49 model are passive transmitters, better for a 4 to 20 mA current loop. Both types are mostly used for temperature and humidity control in conditioning and ventilation applications (HVAC/BEMS) in pharmacy, clean rooms, ventilation ducts, and various similar industrial environments.