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The SF72 dew-point transmitter is a compact sensor designed
for use in industrial dryer applications at the key -40 to
+10°C dp measuring points, where response speed, reliability
and long term stability of data within a control process is
critical.
The transmitter is pressure rated to 450 bar, ensuring process
gas safety, through the use of a 10-year fi eld-proven stainless
steel body and glass-to-metal seal. The SF72 has three
alternative industry-standard sample block connections giving
form, fi t & function benefi ts.
Our polymer based sensor is calibrated on a high volume
traceable calibration system, providing OEM quantities of
units, each with an 8-point traceable calibration certifi cate.

Highlights
• Ideal for membrane and refrigeration dryer use
• Compatible with Compressed Air Quality ISO8573.1 Class
2 to 6 requirements
• Dew point measurement range -50 to +60°C dp
• Fast response
• Rugged 316 stainless steel IP 66 construction
• 8-Point traceable calibration certifi cate
• Accuracy ±2°C dp
• G ½ BSP, ¾ and 5/8 UNF process connectionsPerformance
Measurement range
(dp)
-50 to +60°C dew point
Accuracy (dp) ±2°C dew point
Repeatability ±0.2°C dew point
Long term stability Less than 1% per year at reference conditions
Calibration Traceable 8-point calibration certifi cate
Electrical specifi cations
Output signal 4-20 mA (2-wire connection, current source)
Output Dew point
Analog output scaled
range
Standard -60 to +60°C
-50 to +50°C
-50 to +30°C
Non-standard available upon request
Supply voltage 12-28 VDC
Load resistance Max 250 Ω @ 12 V (500 Ω @ 24 V)
CE marked Certifi ed
Operating specifi cations
Operating temperature -40 to +60°C
Operating pressure 45 MPa (450 barg) maximum
Over pressure rating x2 operating pressure 90 MPa (900 barg)
Flow rate 1 to 5 Nl/min mounted in standard sampling
block; 0 to 10 m/sec
(0 to 32.8 fps) direct insertion
Thermal compensation Characterised over operating range
Mechanical specifi cation
Ingress protection IP66 in accordance with standard
BS EN 60529:1992
NEMA 4 in protection accordance with standard
NEMA 250-2003
Housing material 316 Stainless steel
Dimensions L=132mm (incl. connector & HDPE Filter) x
ø27mm
Filter Standard HDPE Guard <10μm
Optional Sintered guard 80μm
Process connections
and material
G 1/2” BSP, 3/4” - 16 UNF, 5/8” - 18 UNF
316 Stainless steel
Weight 150g
Electrical connections Hirschmann GDS series (DIN 4350-C)
Digital diagnostic
communications
RS485, 2-wire Modbus RTU