Dew point
FA 550 dew point sensor - In robust die-cast aluminium housing
The FA 550 is ideal for outdoor dew point measurements or rougher industrial environment

Special features:• Robust, waterproof die-cast aluminium housing, IP 67• Alarm relay - limit value adjustable via buttons (max 60 VDC, 0.5 A)• 4...20 mA analogue output• Optional: 2 pieces 4 ... 20 mA analogue output e.g. for dew point and temperature• Extremely stable in the long term
• Quick adaption time
• Pressure-resistant up to 500 bar (optional)• NEW: Modbus-RTU interface• NEW: Ethernet interface (optional)• 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/kg], moisture content V/V[ppmV/V], partial vapour pressure [hPa], atmospheric dew point [° Ctd.atm]
APPLICATON:• Dew point measurement in the compressed air after adsorption dryers/membrane
dryers and refrigeration dryers• Residual moisture measurement / dew point measurement in gases such as:
oxygen, nitrogen, argon, hydrogen, natural gas, biogas ...

Easy operation via the keys on the display

The integrated display shows the dew point in big figures
as well as further humidity parameters on two more display pages. The arrow key can be used to scroll between
the display pages.

The alarm threshold value for the integrated relay canbe freely entered via the keys. In addition to the alarm
threshold, the hysteresis can also be freely entered.

The 4…20 mA analogue output can be scaled freely oralso allocated to one further parameter, e. g. g/m³.

After entering the system pressure of the compressed
air system and the reference pressure (atmosphericpressure), the sensor can also calculate back to theatmospheric dew point from the measured pressure dew
point if desired.

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Dew point
Example order code FA 550: 0699 0550_A1_B1_C1_D1_E1_F1_G1_H1_I1

Scaling analogue output

Measuring range
A1A2A3A4A5A6-80…+20 °Ctd. (-112 to 68 °F)-20…+50 °Ctd. (-4 to 122 °F)-40…+30 °Ctd. (-40 to 86 °F)-60…+30 °Ctd. (-76 to 86 °F)-80…+20 °Ctd. (-112 to 68 °F)(scaling 4…20 mA = -100…+20 °Ctd.)-80…+20 °Ctd. (-112 to 68 °F)(scaling 4…20 mA = -110…+20 °Ctd.)with integrated display

B2

without display

C4
C5E2

Special scaling 4…20 mA = 0…x g/m³, ppm, g/kg etc.

F1
F2

Stainless steel sintered cap (~ 50 μm)
perforated stainless steel cap

Connection thread
G1

G 1/2″G2

UNF 5/8"

G31/2” NPT

Maximum pressure

Option Signal output / Bus connection
C1

Standard scaling

Sensor protection cap

Display option
B1

E1

2 x 4 ... 20 mA analogue output (electrically isolated),
alarm relay, RS 485 (Modbus-RTU)
1 x 4 ... 20 mA analogue output (not electrically isolated),
alarm relay, RS 485 (Modbus-RTU)
Ethernet interface (Modbus / TCP), 1 x 4 ... 20 mA analogue output (not electrically isolated), alarm relay, RS485 (Modbus-RTU)

C8M-Bus

C9

Ethernet interface PoE (Power over Ethernet)
Modbus / TCP), 1 x 4 ... 20 mA analogue output (notelectrically isolated), alarm relay, RS 485 (Modbus-RTU)

H150 bar

H2350 bar

H3500 barSurface conditon
I1I2I3standard version
special cleaning - oil and grease free (e.g. for oxygenapplications and so on)
Silicone-free version including special cleaning oil- andgrease-freeSpecial version analogue output
D1
D2

No special version
Special version 2…10 V

DESCRIPTIONORDER NO.

FA 550 Dew point sensor in robust die-cast aluminum housing

0699 0550

Further accessories:
Standard measuring chamber up to 16 bar

0699 3390

High pressure measuring chamber for compressed air up to 350 bar

0699 3590

Stainless steel bypass measuring chamber for dew point measurementin gases under pressure

0699 3290

Connection cables:
Connection cable for probes 5 m with open ends

0553 0108

Connection cable for probes 10 m with open ends

0553 0109

Ethernet connection cable length 5 m, M12 plug x-coded (8 pin) to
RJ 45 plug

0553 2503

Ethernet connection cable length 10 m, M12 plug x-coded (8 pin) to
RJ 45 plug

0553 2504

Power supply in wall housing for max. 2 sensors VA / FA series 5xx,100-240 VAC, 23 VA, 50-60 Hz / 24 VDC, 0.35 A

0554 0110

CS Service Software VA 550 incl. interface cable to PC (USB) andpower supply - for configuration / parametrisation VA 550/570

0554 2007

PNG cable screwing - for FA 550, VA 550/570

0553 0552

Calibration and adjustment:
Precision calibration at -40 °Ctd or 3 °Ctd incl. ISO certificate

0699 3396

Additional calibration point freely selectable

0700 7710

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TECHNICAL DATA FA 550
Measuring range:-80…20 °Ctd, -60…30 °Ctd,-20…50 °Ctd, or
0…100% RHAccuracy:± 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 to350 bar or 500 bar

Power supply:

24 VDC (10…36 VDC)

Protection class:

IP 67

EMC:

In acc. with DIN EN 61326-1

Operating temperature:-20…50 °C

Outputs:

Standard:
Modbus-RTU, 4…20 mA
active (not electricallyisolated),
alarm relay (max. 48 VDC,0.5 A)
Options: See order code

Burden:< 500 ΩMaterial:

Die-cast aluminum housing,
sensor tube stainless steel
1.4571Screw-in thread:

G 1/2”, optional 5/8" UNF,
NPT 1/2”

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