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Dew-Point Transmitter for Compressed Air Dryers - SF82

Updated:2023-09-20

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  • Brand: PST/Michell
  • Model: SF82
  • 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 rea
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Product Details

Dew-Point Transmitter for Compressed Air Dryers - SF82 Description:

Product Manual

Fast Response Moisture Meter with Multiple Process Connections.

Features

Dew point or ppmV moisture content output

Accuracy ±2 °C (±3.6 °F) dew point

MiniDIN 43650 C, M12 electrical connectors

Traceable 9-point calibration certificate

Modbus RTU over RS485 digital communication

4...20 mA 2 wire

Power supply 5...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

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 (+122 °F). The SF82 is capable of reliably providing fast, accurate dew-point measurements down to -60 °C (-76 °F) 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.

Specification

SF82 MiniDIN 43650 C SF82 M12
Performance Specifications
Measurement Range -60 °C...+60 °C (-76 °F...+140 °F) dew point
Accuracy ±2 °C (±3.6 °F) dew point*
Response Time 63% at room temperature at 1 bara (14.5 psia)
-60 °C...-20 °C (-76 °F...-4 °F) dew point: 6 s
-20 °C...-60 °C (-4 °F...-76 °F) dew point: 40 s
Repeatability 0.5°C (32.9 °F) dew point
Calibration 9-point calibration certificate traceable to national standards
Electrical Specifications
Output Signal User configurable over range; 4...20 mA
(2-wire connection, current source)
User configurable over range; 4...20 mA (2-wire connection, current source)
Modbus RTU over RS485 digital communications
Moisture Output Dew-point or moisture content
Temperature Output Not available Data via Modbus RTU
Analog Output Scaled Range
4...20 mA (Dew point)
-60 °C...+60 °C (-76 °F...+140 °F) dew point
-50 °C...+50 °C (-58 °F...+122 °F) dew point
-50 °C...+30 °C (-58 °F...+86 °F) dew point
-80 °C...+20 °C (-112 °F...+68 °F) dew point
-20 °C...+50 °C (-4 °F...+122 °F) dew point
(Non standard ranges available on request)
Analog Output Scaled Range
4...20 mA (moisture content in gas)
0...24000 ppmv
(Non standard ranges available on request)
Supply Voltage 6.5...28 V DC 5...28 V DC
Load Resistance Max 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption 23 mA max Analog only 23 mA max, Digital only 6 mA max
Electrical Safety IEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010 IEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010
EN61373 Rail Rolling Stock
EN50121-3-2:2016 Rail EMC/RFI
Operating Specifications
Operating Temperature -20 °C...+60 °C (-4 °F...+140 °F)
Compensated Temperature Range -20 °C...+50 °C (-4 °F...+122 °F)
Storage Temperature -40 °C...+60 °C (-40 °F...+140 °F)
Maximum Operating Pressure 10 MPag (100 barg/1450.38 psig) maximum
Pressure Safety Rating 45 MPag (450 barg/6526.7 psig) maximum
Flow Rate 1...5 Nl/min mounted in standard sampling block; 0...10 m/sec direct insertion
Mechanical Specifications
Ingress Protection IP66 in accordance with BS EN 60529
(current version);
NEMA 4 ingress protection in accordance with
NEMA 250 (current version)
IP65
Housing Material 316 stainless steel
Dimensions L = 133 mm x ø45 mm (5.24” x ø1.77”) (with connector cable) L = 156 mm x ø45 mm (6.14” x ø1.77”) (with connector cable)
Filter (Sensor Protection) Standard: HMWPE <10 μm Optional: 316 stainless steel sintered guard <80 μm
Process Connection 5/8” 18 UNF
3/4” 16 UNF
G1/2” BSP
KF40 Flange Accessories Flange for 5/8” 18 UNF & 3/4” 16 UNF process connections
Weight 150 g (5.29 oz) (excluding connector cable)
Electrical Connections MiniDIN 43650 form C M12 5 pin (A coded)
Mating Electrical Connections Mating connector supplied as standard
Optional 0.8, 2, 5, 10 metre (2.62, 6.56, 16.4, 32.81 foot) MiniDIN connector/cable available
Optional 0.8 , 2, 5, 10 meter M12 A coded
connector/cable available
Analog Output
Diagnostic Conditions
(factory programmed)
Sensor fault: 23 mA
Under-range dew point: mA
Over-range dew point: mA
NOTES * Over Compensated Temperature Range

Suitable Applications

Dew-point measurements for:

Refrigeration dryers

Membrane dryers

Adsorption dryers

Medical and surgical air

Breathing air

Additive manufacturing

Plastic injection moulding

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