THM50X Temperature & Humidity Transmitter
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 / ±1%RH
Protection Rating: IP65 (Housing)
THM50X Temperature & Humidity Transmitter
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 / ±1%RH
Protection Rating: IP65 (Housing)
● 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.
● 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.
● Multiple physical measurement units switchable: %RH, °C, mbar, g/kg, g/m³, kJ/kg, AH%.
*AH% = the actual amount of water vapor in the air, defined with the saturated value at 25 °C as the reference. That is, the maximum water content at 25 °C is taken as 100%, and AH% represents the percentage calculated based on the corresponding absolute humidity (AH).
| Temperature | Actual Absolute Humidity (Measured) | Absolute Humidity Percentage (AH%) |
| 100°C | 4.6 g/m³ | (4.6 / 23) x 100% = 20% |
| 100°C | 1.15 g/m³ | (1.15 / 23) x 100% = 5% |
*Note: The saturated humidity at 25 °C is 23.03 g/m³.
Input | |
Signal type | Capacitive humidity sensor & Pt100 Class A |
Measuring range | Wall type：-40°C ... +80°C |
Output | |
Output | 4 ... 20 mA / 0 ... 10 V / RS-485 |
Signal connection | 3-wire |
Warm-up time | < 30 sec |
Response time (at 25°C) | t90≦ 20 sec (S.S. Metal grid filter with mesh) |
Load resistance | Current output：≦500 Ω |
Output calibration (Adjustment range) | Software / Button |
Accuracy | |
Temperature | ±0.1°C±0.002°C×tactual |
Humidity (0 ... 90%) | Nonlinear error：±1%RH |
Humidity (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 |
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) / |
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 |
Semiconductor / 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