PFT25

• Measuring temperature and relative humidity with a „single-chip“-sensor
• Fast response time
• Digital transmission from sensor to the evaluation electronics
• Operational use temperature -30...+50 °C
• Operational use humidity 0...100 %
• Additional computed values: dew point temperature, absolute humidity, wet bulb temperature and enthalpy
• Analogue outputs 0...10 V or 4...20 mA
• Sensor interchangeability without need for re-calibration
• Exchange sensor available separately
• Supply voltage 15...30 Vdc or 24 Vac
• Protection class IP 65

The climate transmitter PFT25 converts the directly measured values temperature and relative humidity into often used climatic values dew point temperature, absolute humidity, wet bulb temperature and enthalpy by digital calculation. The device has two analogue outputs, output 1 is always set to temperature, whilst the second output can be set to 4 further values by a two stage dip-switch. The design of the PFT25 corresponds to the transmitter PFT22.

Specifications

Sensor: single-chip sensor for humidity and temperature with digital signal transmission and calibration memory on the chip.

Output 1
Temperature: -30...0...+50 °C
Relative humidity: 0...100 %

Output 2 is selectable to:
Relative humidity: 0...100 %
Absolute humidity: 0...50 g water/kg air
Wet bulb temperature: -30...0...+50 °C
Dew point: -30...0...+50 °C
Enthalpy: Sensor: 0...200 kJ/kg

Special measuring range
Absolute humidity: AF = 0...50 g/kg    

All measured and calculated values are shown with a resolution of 12 bits. For the calculation, a mean air pressure of 1000 hPa is used. To achieve maximum accuracy, the location of medium height and air pressure are given on the spot.