Libratherm offers a low cost, rugged and reliable Wall Mount Humidity Sensor cum Transmitter HX-220 for sensing T or RH or T + Rh in the environment and transmitting the proportional analog values (4-20) mA or (0-10) VDC.
Normally, the signal generated by T+RH sensors is low in strength hence cannot be transmitted over a very long distance, and if done so the signal is likely to drop over a very long cable which will result in the inaccurate measurement of temperature and %RH.
The High Precision Humidity Transmitter featured here converts these low-level signals from Pt-100 and Rh sensor to equivalent 4-20mA/0-10Vdc linear analog signal, which can be transmitted over a very long distance without loss of accuracy in the measurement. Dual 4-20mA proportional to T and %RH can be used for remote measurement and indication and control.
This Hygrothermo Transmitter operates on a 24VDC power supply and is housed in an ABS plastic enclosure with perforation for sensing. The 24VDC supply and 4-20mA are electrically isolated from each other and hence prevent any ground line interferences or loading effect, while connecting to any external measuring/controlling devices like DCS, PLC, BMS controller, HMI, DDC, or PID controllers. Standard 4 core or 6 core 2-meter cable with end terminal is attached to the transmitter for ease of connection and wiring.
|Item||Rh sensor cum Transmitter|
|Built in Sensors||For %Rh: Capacitive type Humidity sensor (made in Japan)|
|RH Range||0 to 100%|
|%RH Output||(4-20) mA / (0-10)VDC proportional to 0 to 100%Rh|
|RLmax = 500 Ohms for (4-20)mA, RLmin = 100K for (0-10)VDC|
|Operating range||10% to 90%Rh (5.6 to 18.4)mA / (1 to 9)Vdc|
|Load Resistance||For 4-20mA Output, RLmax = 400 Ohms|
|Isolation Voltage||Greater than 1.5KV (4-20mA/0-10VDC Output and 24VDC Supply voltage are electrically isolated)|
|Supply Voltage||24 VDC ± 10% @ 50mA max. (Wide range of 18 to 36VDC)|
|Type||Wall Mounted / Duct mounted|
|Enclosure Size||76 x 70 x 38 mm.|
|Enclosure||IP-65 ABS Plastic with wall mounting clamps.|
|Cable||4 core or 6 core PVC/PVC insulated 2 meter long cable with standard colour code.
Extra length of cable can be provided at additional cost.
|Precautions for use||Avoid condensation and drench.
Avoid exposure to saline, inorganic and organic gas.
|Sr. No.||Product Description||Part No.|
|1||Wall Mount Humidity Sensor and Transmitter with 1 x (4-20mA) output||3103-1|
|2||Wall Mount Humidity Sensor and Transmitter with 1 x (0-10)V output||3103-2|