Libratherm offers a low cost, rugged and reliable Wall Mount Humidity and Transmitter HTX-440 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 and Temperature 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 Industrial Grade Temperature 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||T + RH sensor cum Transmitter / RH sensor cum Transmitter|
|Models||HTX-440, HTX-440-DM, HX-440 and HX-440-DM|
|Built in Sensors||For Temp.: Pt-100 Class A element (Hayashi-Denko Japan make)|
|For %Rh: Capacitive type Humidity sensor (Honeywell USA make)|
|Temp. Range||0 to 60oC (Std. range for HVAC applications)|
|Temp. Output||(0-1)VDC/(4-20) mA / (0-10) VDC proportional to 0 to 60oC or proportional to selected temperature range.|
|RLmax = 500 Ohms for 4-20mA, RLmin = 100K for 0-10VDC|
|Temp. Accuracy||± 0.5 oC|
|RH Range||0 to 100%|
|%RH Output||(0-1)VDC/(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|
|RH Accuracy||+/- 2% @ 25oC and 50% Rh|
|Load Resistance||For 4-20mA Output, RLmax = 400 Ohms. For 0-10VDC, RLmin = 100K|
|Isolation Voltage||Greater than 1.5KV (4-20mA/0-10VDC Output and 24VDC Supply voltage are electrically isolated)|
|Supply Voltage||24 VDC @ 50mA max. (Wide range of 18 to 36VDC @ 50mA)|
|Type||Duct mounted in the Duct hole of 14 to 15 mm.|
|Enclosure / SS Stem Size||76 x 70 x 38 mm. / 12.5mm Dia. x 200mm (std. length)|
|Enclosure||IP-65 ABS Plastic with wall mounting clamps.|
|Cable||4 core or 6 core PVC/PVC insulated 2meter long with standard colour code.
Extra length of cable can be provided against order.
|Precautions for use||Avoid condensation and drench. Avoid exposure to saline, inorganic and organic gas.
Avoid exposure to saline, inorganic and organic gas.
|Sr. No.||Model||Product Description||Part No.|
|1.1||HTX-440||Wall Mount Humidity + Temperature Sensor cum Transmitter with 2 x 4-20mA output||3201-1|
|1.2||HTX-440||Wall Mount Humidity + Temperature Sensor cum Transmitter with 2 x 0-10V output||3201-2|