FA 500
CS
Non-Customized
Portable
CE
24 VDC (10…36 VDC)
IP 65
in Acc. with DIN En 61326-1
-20…50 °c
RS 485
< 500 Ω
CS
Export Carton
76.5 x 85 x 75 mm
Germany
9025800090
Product Description
FA 510/515 Dew Point Sensor
FA 500 is the ideal dew point measuring instrument with integrated display and alarm relay for refrigeration, membrane and adsorption dryers.

Typical applications:
• Integrated display
• Threshold value adjustable via keypad, alarm relay (max. 60 VDC, 0.5 A)
• Pressure-tight up to 500 bar (special version)
• Extremely stable in the long term
• Quick adaption time
• 4...20 mA analogue output for dew point
• Diff erent refrigeration and adsorption dryer versions
• NEW: Modbus-RTU interface
• NEW: Higher resolution of sensor signal due to the improved evaluation electronics
• NEW: Sensor diagnosis on site with a portable device or CS Service Software
• Integrated display
• Threshold value adjustable via keypad, alarm relay (max. 60 VDC, 0.5 A)
• Pressure-tight up to 500 bar (special version)
• Extremely stable in the long term
• Quick adaption time
• 4...20 mA analogue output for dew point
• Diff erent refrigeration and adsorption dryer versions
• NEW: Modbus-RTU interface
• NEW: Higher resolution of sensor signal due to the improved evaluation electronics
• NEW: Sensor diagnosis on site with a portable device or CS Service Software
Readable via Modbus:
- Pressure dew point [°Ctd.]
- Temperature [°C]
- rel. humidity [% RH]
- abs. humidity [g/m³]
- Degree of humidity [g/m³]
- Moisture content V/V [ppmV/V]
- Water vapour particle pressure [hPa]
- Atmospheric dew point [°Ctd.atm]



- Ideal for all types of compressed air dryers with different measuring ranges such as -80...+20°Ctd; -60...+30°Ctd; -20...+50°Ctd
- Sensor element insensitive against condensation and water
- Maximum pressure 500 bar (special version)
- Long-term stable and drift-proof, thus optimized calibration intervals
- Gas-independent measurement, also suitable for other non-corrosive gases
- Fast response time, especially in case of moisture ingress
- BSP- or NPT-Threads
- Protection class IP 65
- Analog output 4...20 mA and Modbus RTU (RS 485) interface, contact relay with limit value adjustable via keys (max. 60 VDC, 0.5A)
- Optional: Modbus TCP (Ethernet), Modbus TCP PoE (Ethernet) or M-Bus interface
- Measured values available in different units, pressure dew point [°Ctd], temperature [°C], rel. humidity [%rh], abs. humidity [g/m³], moisture content [g/kg], moisture content V/V [ppmV/V], water vapor partial pressure [hPa], atmospheric dew point [°Ctd.atm]
- On-site sensor diagnostics with handheld device or CS Service Software
TECHNICAL DATA FA 510/515
Measuring range | -80…20 °Ctd, -60… 30 °Ctd, -20…50 °Ctd, or 0…100% RH |
Accuracy | ± 1 °C at 50…-20 °Ctd ± 2 °C at -20…-50 °Ctd ± 3 °C at -50…-80 °Ctd |
Pressure range | -1…50 bar Special version up to 500 bar |
Power supply | 24 VDC (10…36 VDC) |
Protection class | IP 65 |
EMC | In acc. with DIN EN 61326-1 |
Operating temperature | -20…50 °C |
Connection | 2 x M12, 5-pin for analogue output, Modbus-RTU and alarm output, M-Bus (optional) Ethernet (PoE) (optional) |
PC connection | 4…20 mA = -80…20 °Ctd 4…20 mA = -60…30 °Ctd 4…20 mA = -20…50 °Ctd |
Burden for analogue output | < 500 Ω |
Alarm relay | NC, max. 60 VDC, 0.5 A |
Screw-in thread | G 1/2″ |
Dimensions housing | 76.5 x 85 x 75 mm (WxHxD) |






