Temperature Transmitter – Duct Mount (Dual Output) – TTX-440-DM

Temperature Transmitter – Duct Mount (Dual Output) – TTX-440-DM

Product Description :
TTX-440-DM – Duct Mount Temperature and Humidity Transmitter.  
Size (mm) – 76 x 70 x 38 (H x W x D)

Libratherm offers a low cost, rugged and reliable Duct Mount Temperature Transmitter TTX-440-DM 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.

Key Features:
Application:
Parameters Description
Item T + RH sensor cum Transmitter / RH sensor cum Transmitter
ModelsHTX-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. Range0 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 Range0 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 ResistanceFor 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 Voltage24 VDC @ 50mA max. (Wide range of 18 to 36VDC @ 50mA)
TypeDuct mounted in the Duct hole of 14 to 15 mm.
Enclosure / SS Stem Size76 x 70 x 38 mm. / 14.5mm Dia. x 200mm (std. length)
EnclosureIP-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 useAvoid condensation and drench. Avoid exposure to saline, inorganic and organic gas.
Avoid exposure to saline, inorganic and organic gas.
Sr. No.ModelProduct DescriptionPart No.
1.1TTX-440-DM Duct Mount Temperature Sensor cum Transmitter with 2 x 4-20mA output.
(SS Stem Size = 14.5 mm Dia. x 200 mm)
3205-1
1.2 TTX-440-DM Duct Mount Temperature Sensor cum Transmitter with 2 x 0-10V output.
(SS Stem Size = 14.5 mm Dia. x 200 mm)
3205-2

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