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Microcontroller Humidity And Temperature Transmitter

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With local display and RS485 interface in IP65 enclosure our range of micro controller based humidity comes with temperature transmitter.
Model HTX-3000

DesignMicro controller based (8 bit) with 12 bit ADC and 12 bit dual DAC
Temperature SensorRTD (Pt-100) Class A element / 3 wire Alpha = 0.00385
RH SensorLaser Trimmed Thermo set polymer capacitive element
Temperature Range-40.0 to 85.0°C
RH Range0.0 to 100.0 %
Temperature Accuracy"+/- 0.3°C "
RH Accuracy+/- 2% RH, 0 -100%RH non condensing @ 25°C.
RH Lienarity+/- 0.5% RH typical.
Temperature Compensation for RHBuilt in using mathematical / software tabulation. (Over full temperature range)
Supply Voltage24VDC @ 200mA (12 to 36VDC)
Output 1 for Temperature4-20mA proportional to the specified and selected Temperature range (12 bit resolution). (Isolated from Supply voltage).
Output 2 for %RH4-20mA proportional to the specified %RH range (12 bit resolution). (Isolated from Supply voltage).
Loop ResistanceRLmax = 150 Ohms with internal 5VDC supply and RLmax = 600 Ohms when external 24VDC is used – This 24VDC must be different from Supply voltage.
Display4 digit each – 0.3” red seven segment LED for Temp. and RH.
Connection5 wire connection for supply and current output
Serial CommunicationIsolated 2 wire RS485 MODBUS RTU Slave protocol (MODBUS ID is keyboard programmable)
Enclosure (Size)ABS plastic IP-65 (120 x 80 x 55) mm.
Sensor Stem Size8 x 100 mm for wall mounting model HTX-3000/W and 8 x 200 mm for Duct mounting model HTX-3000/D

HTX-3000/WTemp and %RH Transmitter – wall type and with local display
HTX-3000/DTemp and %RH Transmitter – Duct type and with local display
HTX-3000/FTemp and %RH Transmitter – Floating leads type and with local display.


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