FA 500 - Dew Point Sensor -80...20 ┬░Ctd

The CS dew point sensor FA 500 with 3-wire technology, 4...20 mA and RS 485 Modbus output enables a reliable and long-term stable monitoring of the dew point in industrial applications such as in:

  • Compressed air plants (refrigerating/adsorption dryers)
  • Granulate dryers
  • Medical gases
  • Non-corrosive gases, e. g. nitrogen


Product Features
  • NEW: Modbus-RTU interface
  • NEW: Higher resolution of sensor signal caused by the improved evaluation electronics
  • NEW: Sensor diagnosis on site with a portable device or CS Service Software
  • Integrated display and alarm relay
  • Threshold value adjustable via keypad alarm relay (max. 60 VDC, 0.5 A)
  • Pressure-tight up to 350 bar (special version)
  • Extreme long-term stability
  • Quick response time
  • 4...20 mA analogue output

Easy operation via keys pad at display

The integrated display shows the dew point in big figures as well as further humidity parameters on two more display pages. By means of the arrow key it can be browsed between the display pages.
The alarm threshold value for the integrated relay can be entered via the keys. Apart from the alarm threshold it is also possible to enter the hysteresis freely.

The alarm could be set to one of the values (units)


Technical Data
Measuring range (3 version) -80...20 °Ctd , -60...30 °Ctd? and -20...50 °Ctd
Accuracy:  ± 1°C at 20...-20°Ctd
± 2°C at -20...-50°Ctd
± 3°C at -50...-80°Ctd
Pressure range -1...50 bar special version up to 350 bar
Output RS 485 (Modbus RTU)
4...20 mA 3-wire technology
Display 1.8” TFT
Power supply 24 VDC (16...30 VDC) smoothed
Protection class  IP 65
EMV:  According to DIN EN 61326
Operating temperature -20...70 °C
Burden for analogue output  < 500 Ω
Alarm relay max. 60V, 0,5A NC relay, relays is closed in case of alarm and power failure. Alarm value adjustable via keyboard.
nnection M12, 5- ole
Screw-in thread  G 1/2“ (Option UNF 5/8” or NPT ½”)
Dimensions 76.5 x 85 x 75 mm (W x H x D)