THM50X Temperature & Humidity Transmitter
Model :
THM501THM503
Sensor Type: Capacitive humidity sensor & Pt100 Class A
Measuring Range: Wall-mounted: -40°C ... +80°C / Remote type: -40°C ... +150°C
Output: 4 ... 20 mA / 0 ... 10 V / RS-485 / NPN / PNP
Accuracy: ±0.1°C ±0.002°C × t_actual / ±2%RH
Protection Rating: IP65 (Housing)
Measuring Range: Wall-mounted: -40°C ... +80°C / Remote type: -40°C ... +150°C
Output: 4 ... 20 mA / 0 ... 10 V / RS-485 / NPN / PNP
Accuracy: ±0.1°C ±0.002°C × t_actual / ±2%RH
Protection Rating: IP65 (Housing)
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Features● Aluminum alloy casing for harsh environments.
● Direct key operation for temperature/humidity adjustment, RS-485 settings, and unit switching.
● High-accuracy temperature and humidity measurement with fast response and quick recovery after condensation.
● Multiple units switchable: %RH, °C, mbar, g/kg, g/m³, kJ/kg, absolute humidity.
● RS-485 communication for configuring measurement units, ranges, output type, and station address.
● DATA LOG function capable of recording up to 65,535 entries for analysis.
● Measures extremely low humidity, down to 0.1% RH.
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ApplicationsSemiconductor / Electronics / Chemical industry / Pharmaceutical / Steel industry / Biotechnology industry / Industrial process monitoring / Air conditioning / Cleanrooms / Laboratories / Weather stations / Hospitals / Buildings / Dryers / Factories / Storage rooms / Environmental ventilation control / Environmental test chambers / Greenhouses
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Specification
Input
Signal type
Capacitive humidity sensor & Pt100 Class A
Measuring range
Wall type：-40°C ... +80°C
Remote type：-40°C ... +150°C
Humidity：0 ... 100%RHOutput
Output
4 ... 20 mA / 0 ... 10 V / RS-485 / NPN / PNP
Signal connection
3-wire
Warm-up time
< 30 sec
Response time (at 25°C)
t90≦ 20 sec (S.S. Metal grid filter with mesh)
t90≦ 30 sec (Sintered filter)Load resistance
Current output：≦500 Ω
Voltage output：≧100 KΩOutput calibration (Adjustment range)
Software / Button
Accuracy
Temperature
±0.1°C±0.002°C×tactual
Humidity (0 ... 90%)
Nonlinear error：±1%RH
Hysteresis error：±0.8%RH
Repeatability error：±0.4%RHHumidity (90 ... 100%)
±2%RH
Temp. influence
0.05%RH/°C
Communication
Comm. Interface & Protocol
RS-485 Modbus RTU
RS-485 Baud Rate
9600、19200、38400、57600、115200 bps
Environmental
Measuring medium
Air
Temp. Operating (Housing)
-20 ... +60°C
0 ... 90% (Non-condensing)Storage temperature
-20 ... +60°C
Probe pressure resistance
4 bar
Display unit
°C / %RH / dp°C / AH%
Electrical
Power supply
DC 24 V±10%
Current consumption
DC 24 V：60 mA
Electrical connection
M12 8P connector
Installation
Installation
Wall / Remote
Display
Display readout
Temperature/Humidity (initial value setting)
Decimal point
Button
Sampling time
1 cycle/sec
Unit selection
Temperature(T) / Humidity(H) / Dew Point(D) / Frost Point(F) / Wet-bulb Temperature(W) /
Water Vapor Pressure (E) / Mixing Ratio(R) / Absolute Humidity(A) / Specific Humidity(S) /
Absolute Humidity(A%)Response time
0 ... 100
Certification
Certification
CE
Protection
IP rating
IP65 (Body)
Electrical protection
■ Reverse polarity ■ Over-voltage
Material
Housing
Aluminum alloy
Probe
Stainless steel
Remote probe cable
TEFLON
Weight
THM501：170 g
THM503：370 g
Note : Design and specifications are subject to change without notice.
Note : If the product has RS-485 function, to avoid damaging product, please make sure the product and the device which connect with RS-485 are on common ground.