SKU: SF82
Dew-Point Transmitter for Compressed Air Dryers - SF82
Fast Response Moisture Meter with Multiple Process Connections. Features Dew point or ppm V moisture content output Accuracy ±2 °C dew point Modbus RTU over RS485 digital communication 4 to 20 mA 2 wire Traceable 9-point calibration certificate Power supply 5 to 28 V DC Ultra-fast response to moisture change Low cost of ownership and easy maintenance with sensor exchange program 316 stainless steel sensor and sample blocks 5/8” UNF, 3/4” UNF, G 1/2” process connections KF40 Glove Box flange MiniDIN 43650 C, M12 electrical connectors
Specifications
| Measurement Range | -60 °C to +60 °C (-76 °F to +140 °F) dew point |
| Accuracy | ±2 °C (±3.6 °F) dew point (over compensated temperature range) |
| Response Time (63%) | -60 °C to -20 °C dew point: 6 s; -20 °C to -60 °C dew point: 40 s (at room temperature, 1 bara) |
| Repeatability | 0.5 °C (32.9 °F) dew point |
| Calibration | 9-point calibration certificate traceable to national standards (-60 °C to +20 °C dew point) |
| Output Signal | User configurable 4–20 mA (2-wire, current source); Modbus RTU over RS485 digital communications |
| Moisture Output | Dew point or moisture content (ppmV) |
| Temperature Output | Data via Modbus RTU (not available on 4–20 mA) |
| Analog Output Scaled Range (Dew Point) | -60 °C to +60 °C; -50 °C to +50 °C; -50 °C to +30 °C; -80 °C to +20 °C; -20 °C to +50 °C (non-standard ranges available on request) |
| Analog Output Scaled Range (Moisture Content) | 0 to 24000 ppmV (non-standard ranges available on request) |
| Supply Voltage (MiniDIN 43650 C) | 6.5 to 28 V DC |
| Supply Voltage (M12) | 5 to 28 V DC |
| Load Resistance | Max 250 Ω @ 12 V (500 Ω @ 24 V) |
| Current Consumption (MiniDIN 43650 C) | 23 mA max |
| Current Consumption (M12) | Analog only 23 mA max; Digital only 6 mA max |
| Electrical Safety | IEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010; EN61373 Rail Rolling Stock; EN50121-3-2 Rail EMC/RFI |
| Operating Temperature | -20 °C to +60 °C (-4 °F to +140 °F) |
| Compensated Temperature Range | -20 °C to +50 °C (-4 °F to +122 °F) |
| Storage Temperature | -40 °C to +60 °C (-40 °F to +140 °F) |
| Maximum Operating Pressure | 10 MPag (100 barg / 1450.38 psig) |
| Pressure Safety Rating | 45 MPag (450 barg / 6526.7 psig) |
| Flow Rate | 1 to 5 Nl/min mounted in standard sampling block; 0 to 10 m/sec direct insertion |
| Ingress Protection (MiniDIN 43650 C) | IP66 (BS EN 60529); NEMA 4 |
| Ingress Protection (M12) | IP65 |
| Housing Material | 316 stainless steel |
| Dimensions (MiniDIN 43650 C) | L = 133 mm x ø45 mm (5.24" x ø1.77") with connector cable |
| Dimensions (M12) | L = 156 mm x ø45 mm (6.14" x ø1.77") with connector cable |
| Weight | 150 g (5.29 oz) excluding connector cable |
| Filter (Sensor Protection) | Standard: HMWPE <10 µm; Optional: 316 stainless steel sintered guard <80 µm |
| Process Connections | 5/8" 18 UNF; 3/4" 16 UNF; G1/2" BSP; KF40 Flange |
| Electrical Connections | MiniDIN 43650 form C; M12 5-pin (A coded) |
| Mating Connectors (MiniDIN) | Mating connector supplied as standard; Optional 0.8, 2, 5, 10 m cable available |
| Mating Connectors (M12) | Optional 0.8, 2, 5, 10 m M12 A coded connector/cable available |
| Analog Output Diagnostic Conditions | Sensor fault: 23 mA; Under-range dew point: 4 mA; Over-range dew point: 20 mA |
Datasheet
Download datasheet (PDF)Description
The SF82 is a fast-responding moisture sensor for control of dew point and moisture content in compressed air dryers to maximize energy efficiency. Compressor rooms are often hot with temperatures reaching +50 °C. The SF82 is capable of reliably providing fast, accurate dew-point measurements down to -60 °C dew point even in these challenging conditions.
The SF82 industrial transmitter incorporates the latest Process Sensing Technologies advanced thick-film polymer moisture sensing technology to provide fast, stable and repeatable humidity measurements for all dew-point dryer applications.
It is available with a range of process connections and electrical connectors for easy installation. SF82 dew-point transmitters are included in our service exchange program which reduces both downtime and the cost of maintenance.
Need this instrument calibrated?
Unitest Instruments operates Singapore's SAC-SINGLAS accredited calibration laboratory (ISO/IEC 17025, Lab No. LA-2023-0845-C). We provide traceable calibration with full documentation for most test & measurement instruments.
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