PTSY 120 Temperature and Humidity Sensors for Usage Into Air Condition Ducts with 4 to 20 mA Output

The programmable sensors are intended for temperature measurements and measurements of relative humidity of air in air conditioning ducts. The plastic connection head is provided by the cable ending. Easy mounting of the temperature sensor is ensured by the unique "S head" design invented by SENSIT s.r.o

Digital conception with microprocessor provides long-term stability of parameters, temperature compensation of the humidity sensing element and failure state signalling. The most up to date polymeric sensing element for humidity guarantees stability of indication and resistance to condensation water.
Two galvanically separated current signals 4 to 20 mA are available as output signals of the measured variables, the outputs are set by the producer as follows:
  • The value on the output 1: relative humidity, range 4 to 20 mA is related to 0 to 100 % RH
  • The value on the output 2: temperature, range 4 to 20 mA is related to -30 to 120 °C
A calibration sheet is included in the sensor price.

The sensors are designed to be operated in a chemically non-aggressive environment.


  • plastic central holder
  • other accessories

Declarations, Certificates, Calibration

  • EU Declaration of Conformity – in accordance with Act 22/1997 Coll. on technical requirements on products as amended.
  • Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard, as amended) or in an Accredited laboratory. 


Type of sensor PTSV 120
Type of sensing element Pt 1000/3850
Analog outputs two galvanically separated signals 4 to 20 mA
Current output in the case of error < 3.8 mA or > 24 mA
Power supply (Vcc) 9 to 30 VDC, maximum ripple 0.5 %
Standard length of the stem 150 mm
Range of temperature measurement* -30 to 125 °C
Accuracy ± 0.4 °C in the range 0 to 100 °C, otherwise 0.4 % of the measuring value
Range of relative humidity measurement** 0 to 100 % RH (the reading is temperature compensated in all temperature range)
Accuracy ± 2.5 % RH in the range 5 to 95 % RH at 23 °C
Ingress protection electronics IP 65 in accordance with EN 60 529 as amended;
sensors are placed behind the cover with ingress protection IP 40 in accordance with EN 60 529, as amended
Dust filter of the sensors filtration efficiency 0.025 mm
Operating temperature range of the device -30 to 80 °C
Operating humidity range of the device 0 to 100 % RH
Working position the measure stem downwards
Electromagnetic compatibility in according with EN 61326-1, as amended
Storage conditions temperature -30 to 80 °C, humidity 0 to 100 % RH without condensation
Material of the stem stainless steel DIN 1.4301
Weight 225 g
Material of the box POLYAMIDE

Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

Dimensional Draft

Wiring Diagram

Visit our downloads page to view technical characteristics or contact our technical sales department for more information, prices or with your specifications.

Also, you can reach us on +44 (0) 1865400514
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