Dew point sensor from -20 to 50°Ctd for the typical use in refrigeration dryers

In addition to the previously common 4-20 mA analogue output the new generation of dew point sensors have a digital RS 485 interface (Modbus-RTU). All values like e. g. dew point, temperature, absolute humidity … which are measured and calculated by the dew point sensor can be retrieved via the Modbus protocol.

Compared with the previous models the sensorics and evaluation electronics have been improved once again, especially the integrated temperature compensation. This means: Increased accuracy at different ambient temperatures and an improved resolution of the sensor signal. Like the previous models the new dew point sensors have an excellent long-term stability and show reliable measured values. The sensor element is insensitive against condensation and due to the serial sintered cap made of stainless steel it is protected against direct contact with soiled particles.

Special features of FA 510/515:

• Measuring range -20 to 50°Ctd
• Analogue output 4-20 mA
• Precise, long-term stability
• Quick response time
• NEW: Modbus-RTU interface
• NEW: Higher resolution of sensor signal due to the improved evaluation electronics
• NEW: Sensor diagnosis on site by means of hand-held instrument or CS Service Software
• Readable via Modbus:
  • Pressure dew point [°Ctd.]
  • Temperature [°C]
  • rel. humidity [% RH]
  • abs. humidity [g/m³]
  • Degree of humidity [g/kg]
  • Moisture content V/V [ppmV/V]
  • Partial vapour pressure [hPa]
  • Atmospheric dew point [°Ctd.atm]

 

Measuring range:	-80…20 °Ctd, -20…50 °Ctd
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 66
EMC:	In acc. with DIN EN 61326-1
Operating temperature:	-20…70 °C
Connection:	M12, 5-pin
PC connection:	Modbus-RTU interface (RS 485)
Analogue output:	4…20 mA = -80…20 °Ctd 4…20 mA = -20…50 °Ctd FA 510: 4…20 mA (3-wire) FA 515: 4…20 mA (2-wire)
Burden for analogue output:	< 500 Ω
Screw-in thread:	G 1/2″ Stainless steel Optional: UNF 5/8″, NPT 1/2″
Dimensions:	Ø 30 mm, length approx. 130 mm
Via service software:
Choose units	% RH, °Ctd, g/m³, mg/m³, ppm V/V
Scaling	4…20 mA change