Temp./ Humi. transmitter

TRH-301 Temperature transmitter

TRH-302 Humidity transmitter

TRH-303 Temp./Humi, transmitter

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  • Long-term stability and reliability
  • Accurate relative humidity and temperature measurement
  • Current or voltage outputs
  • Available as wall, duct or separated mounting types


Measurement Range

0 ~ 100% RH

0 ~ 100C (-20 ~ 80C, 0 ~ 50C, -40 ~ 60 C available)

Accuracy (At 25 C)

±2%RH, ±0.3C (*Power supply = 24VDC)

Long-erm stability

Batter than 1% RH per year (Typical0

Temp. Compensation

±0.008%RH / C (Effect @ 0%RH)


<5 seconds (90% at +25C in moving air over 0.5 M/S)


Humidity: Thin-film capacitor

Temperature: RTD PT100Ω


Current output: Humidity: 4~20mA Two wire

              Temperature: 4~20mA Two wire

Valtage output: 0 to 1V, 0 to 5V, 0 to 10V or 1 to 5V, Selectable

*Other scales possible upon request

Fine adjustment

Zero and Span adjustable by spare potentiometer

Power Supply

12 ~ 40V DC, >150mA

Housing / Protection

ABS plastic watertight enclosure (IP65)

Cable gland

Liquid-tight nylon, cable Bushing Dia.5~10mm

Ambient Temperature

-40 ~ 85C (-40 ~ 185F)


Approx. 150g


IP65; CE; RoHS