MTH300S Smart Wall Type Temperature and Humidity Transmitter

  • Description
  • Inquiry


MTH300S is high quality wall type temperature and humidity sensor, adopting Switzerland advanced sensor module and high performance single chip designed for temperature humidity measurement indoor room, widely used in agriculture: greenhouse, mushroom house, farm, seeding room, poultry house; refrigerated storage, Warehouse, cold room Medicinal, HAVC; Building Automation high humidity environment application. High Humidity Environment:



  • High Accuracy, High Stability; Anti-Interference dealing on PCB
  • High sealing technology and excellent three-proof coating protection
  • Range: T: -20 to 80°C, 0-50°C, -40 to 60°C; H: 0-100%
  • Temperature range can be set by inner DIN switch
  • With offset function by built-in keys
  • Output: 4-20mA,0-5VDC,0-10VDC, RS485 output
  • Probe can be with dust-proof, water-proof type, optional
  • Accuracy: T:±3°C, H:±3%; Resolution: T:0.01, H:0.1%RH
  • Protection: Electrical housing: IIP65; Probe: IP54
  • Wide power supply: 12-36VDC; 15-36VDC (4-20mA only)


Size mm


Accuracy T:±0.3℃ (Full range in average); Power Supply 15-36VDC (4-20mA Output);
RH: 3%RH (including non-linear, repeatability, hysteresis) 12-36VDC

(0-5VDC, 0-10VDC; RS485 Output)

Long Stability T: <0.04℃/year; Power consumption 60mA
  RH: <0.05%RH/year Housing Material ABS
Range T: -20 to 80℃; 0 to 50℃, , -40 to 60℃; Probe Type Dust-proof (standard); water-proof
  RH:0-99.9% Installation Wall Type
Resolution T: 0.1℃,  RH:0.1%RH Case Size 80mmx65mmx38mm (LXD)
Response time T: 6t(63%): min=5s, max=30s; Probe Size 42mmx 16mm (LXD)
H (90% static air): 8second Terminals Size 1×2.5 mm² or 2×1.5 mm²
Load resistor <500ohm Entry connector M16x1.5mm
Output 4-20ma, 0-5VDC, 0-10VDC; RS485 output Protection Electrical Case: IP65; Probe: IP54
RS485 Protocol Standard MODBUS-RTU protocol Working Ambient T:-40 to 80℃, H:0-99.9%, no dew
Baud rate 9600; customized Storage Temperature 10-50℃ (0-125℃ at peak)


Order Code

MTH300S temperature and humidity sensor
Order Code: MTH300S-NAN Description
MTH300S -X X X MTH300S Wall Type temperature and humidity sensor
Indicator -N None
-D Yes, with indicator
Output Type A 4-20mA (standard)
A2 4-20mA (2 wire, special), when temperature measured, humidity should be measured
V 0-5VDC
V2 0-10VDC
R RS485 output

Probe Type

N Standard type, dust-proof
W Water-proof (special)

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