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Interior temperature, humidity, barometric pressure sensor with 4-20 mA output

photo of humidity transmitters

Temperature, humidity, barometric pressure transmitters are specially designed for use in exacting interiors in building energy management and HVAC systems. Are designed for easy installation on ordinary KU68 wiring boxes for household switches and sockets.
Large dual line LCD for simultaneous display of temperature, humidity or barometric pressure is an advantage. Display is possible to switch off.
Computerized design ensures temperature compensation of the humidity and pressure sensors and fail indication. Transmitters are designed for use in non-aggressive environment.

- measuring of temperature, humidity and pressure at:

Operating temperature range: 0 to +50°C
Operating relative humidity range: 5 to 95%RH
Current output: 4 to 20mA, two-wire connection
Configuration of outputs and output range: user adjustable from the PC
Power: 9-30Vdc
Dimensions: 88 x 106 x 33 mm
Material of the case: ABS
Color: white
Protection: IP20
Warranty: 2 years

Transmitters are available in the following models:

T0118 air temperature transmitter
Thermometer - larger photo Output 4 to 20mA / 0 to +50°C
Accuracy ±0,5 °C
Display reading and temperature output are user selectable in degrees Celsius or Fahrenheit
T3118 air humidity and temperature transmitter
Hygrometer - larger photo Output 1: 4 to 20mA / 0 to +50°C
Output 2: 4 to 20mA / 0 to 100%RH
Both outputs are galvanically isolated. Output values and range are user adjustable.
Display reading and temperature output are user selectable in degrees Celsius or Fahrenheit.
Measured relative humidity and temperature are also converted to other humidity interpretation - dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy.
Measuring range of relative humidity: 5 to 95%RH
Accuracy of relative humidity measurement: ±2.5%RH from 5 to 60%RH
±3.0%RH from 60 to 95%RH at 23°C
Accuracy of temperature output: ±0.5°C
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: ±3g/m3 at ambient temperature T < 40°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, dual output T3118 transmitter has two galvanically isolated current loops

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 dual output T3118 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

T2118 barometric pressure transmitter
Barometer - larger photo Maximum pressure range: 600 to 1100hPa
Setting from the manufacturer: 4-20mA/800-1100hPa
Accuracy: ±(1,3hPa+0.06% from adjusted output span) at 23°C from 800 to 1100hPa

Display reading and pressure output is user selectable in these units:
hPa, kPa, mbar, mmHg, inHg, inH2O, PSI, oz/in^2

Barometer enables to measure sea level pressure by setting of correction to altitude above sea level.
Manual of room sensor in pdf formatInstruction Manual for all models
Dimensions Dimensions

humidity transmitter wiringhumidity transmitter wiring

Typical application wiring of single output and dual output transmitters

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.

Included accessory:

Traceable calibration certificate from the manufacturer, instruction manual. Calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.
Example of calibration certificate.

Free program TSensor for configuring of the transmitter is ready to download. SP003 cable for barometer adjustment via USB port is necessary to buy.

Larger photo of humidity transmitter cable SP003 cable for transmitter adjustment via USB port

humidity sensor Sensors are directly compatible with sixteen channel Comet
data acquisition system MS

humidity sensorVisit also Comet temperature, humidity, pressure
industrial transmitters

Declaration of conformity in pdf formatDeclaration of conformity in pdf format