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T3118 Interior temperature, humidity transmitter with 4-20mA output

code: T3118
Ambient humidity, temperature transmitter. Indoor use.

For exacting interiors in building energy management and HVAC systems. Are designed for easy installation on ordinary KU68 wiring boxes for household switches and sockets.

Included in delivery:   

    • Traceable calibration certificate
    • Quick start manual
    • Free program TSensor for configuring of the transmitter is ready to Download

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Programmable temperature and humidity transmitter is equipped with temperature and relative humidity sensors. Measured values are also converted to other humidity interpretation - dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy. Degrees Celsius and Fahrenheit are user selectable. Transmitter contains a microprocessor based control circuitry in a plastic case with connection terminals and sensors. Humidity transmitters is equipped with two galvanic isolated 4-20mA outputs. Configuration of outputs and output range are user adjustable. Large dual line LCD for simultaneous display of T+RH or other humidity interpretation is an advantage. Display is possible to switch off. Computerized design ensures temperature compensation of the humidity sensor and fail indication. State-of-the-art capacitive polymer sensor ensures excellent calibration long term stability, inertia against water and condensation. Transmitters are designed for use in non-aggressive environment.


APPLICATIONS - measuring and control of air humidity at:

  • building HVAC management
  • building HVAC automation
  • warehouses
  • manufacturers
  • museums, archives, galleries
  • air-conditioned rooms 

Outputs are set to maximum range from the manufacturer (0 to +50°C, 0 to 100%RH).
To set other range by the user buying of SP003 cable is necessary - see Optional accessory.
Free configuration program TSensor for transmitter adjustment is ready to download anytime.

If different adjustment of outputs is required, please specify required output values (RH, T, Tdp, ..) and required ranges in the order. Adjustment is free of charge.

Any measured value - temperature, relative humidity, dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy can be assigned to each output of the transmitter. Also identical value can be assigned to both outputs.

Ordering example: Transmitter T3118, output 1: RH 10 to 90%, output 2: temperature 0 to 35°C

 Application wiring of the transmitter

Typical application wiring of dual output transmitter

Calculation of minimum power voltage Uss for proper operation:
Uss min> Uo min + Imax * Rz,
where: Uo min= 9 V
Imax... approximately 20 mA
Rz... sensing resistor (shunt)
Both current loops (I1 and I2) are connected analogically, current loop I1 must be always connected.

Technical Data

Technical parameters Value
Output 4-20mA
Measured Value Temperature + Relative Humidity
Construction Type Interior
Design Interior
Temperature Measuring Range -10 to 50 °C
Relay Output No
Two-State Input No
Lcd Display Yes
PoE No
Relative humidity range 5 to 95% RH
Accuracy of relative humidity measurement ±2.5% relative humidity from 5 to 60% at 23°C
±3.0% relative humidity from 60 to 95% at 23°C
Accuracy of temperature output ±0.5°C
Available temperature units degrees Celsius, Fahrenheit
Accuracy and range of dew point temperature output - for more details see graphs ±1.6°C at ambient temperature T<25°C and RH>30%
range -60 to +80 °C
Accuracy and range of absolute humidity output ±1.5g/m3 at ambient temperature T < 25°C
range 0 to 400 g/m3
Accuracy and range of specific humidity output ±2g/kg at ambient temperature T < 35°C
range 0 to 550 g/kg
Accuracy and range of mixing ratio output ±2.2g/kg at ambient temperature T < 35°C
range 0 to 995 g/kg
Accuracy and range of specific enthalpy output ±3.5kJ/kg at ambient temperature T < 25°C
range: 0 to 995 kJ/kg
Current outputs - two-wire connection 4-20mA, galvanic isolated
Configuration of outputs and output range user adjustable from the PC
IP protection IP20
Power 9-30Vdc
Dimensions 88 x 106 x 33 mm (W x H x D)
Material of the case ABS
Color white
Weight approximately 150g
Warranty 3 years
T3110 Temperature and humidity outdoor, indoor probe with 4-20mA output T3110 Temperature and humidity outdoor, indoor probe with 4-20mA output
code: T3110
Ambient temperature, relative humidity transmitter. Outdoor, indoor use.