SF82 Dew-Point Transmitter for Compressed Air

Dew-Point Accessories

Compressed Air Related Products
Simple to install and maintain, the SF82 is a fast response moisture meter measuring dew point and moisture content and is available with a range of process connections and electrical connectors. All SF82 dew-point transmitters are available with a service exchange program which reduces the cost of maintenance.

Michell’s Advanced Thick Film Moisture Sensor technology based Hygrometers are calibrated to international standards and are delivered with a traceable calibration certificate.

  • Dew point or ppmV 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
  • MiniDIN 43650 C, M12 electrical connectors

    Dew-point measurements for:
  • Refrigeration dryers
  • Membrane dryers
  • Adsorption dryers
  • Medical and surgical air
  • Breathing air
  • Additive manufacturing
  • Plastic injection moulding

3D CAD files (Step)

  • SF82 5/8 UNF
  • SF82 3/4 UNF
  • SF82 5/8 UNF
  • SF82 3/4 UNF
  • SF82 G1/2

  • Download now

Easidew Transmitter Series

Technical Specifications

SF82 MiniDIN 43650 CSF82 M12
Performance Specifications
Measurement Range-60 °C to +60 °C dew point
Accuracy±2 °C dew point*
Response Time63% at room temperature at 1 bara
-60 °C to -20 °C dew point: 6 s
-20 °C to -60 °C dew point: 40 s
Repeatability0.5°C dew point
Calibration9 point calibration certificate traceable to national standards
Electrical Specifications
Output SignalUser 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 OutputDew point or moisture content
Temperature OutputNot availableData via Modbus RTU
Analog Output Scaled Range
4-20 mA (Dew point)
-60 °C to +60 °C dew point
-50 °C to +50 °C dew point
-50 °C to +30 °C dew point
-80 °C to +20 °C dew point
-20 °C to +50 °C dew point
(Non standard ranges available on request)
Analog Output Scaled Range
4-20 mA (moisture content in gas)
0 to 24000 ppmv
(Non standard ranges available on request)
Supply Voltage6.5 to 28 V DC5 to 28 V DC
Load ResistanceMax 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption23 mA maxAnalog only 23 mA max, Digital only 6 mA max
Electrical SafetyIEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010IEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010
EN61373 Rail Rolling Stock
EN50121-3-2 Rail EMC/RFI
Operating Specifications
Operating Temperature-20 °C to +60 °C
Compensated Temperature Range-20 °C to +50 °C
Storage Temperature-40 °C to +60 °C
Maximum Operating Pressure10 MPag (100 barg) maximum
Pressure Safety Rating45 MPag (450 barg) maximum
Flow Rate1 to 5 Nl/min mounted in standard sampling block; 0 to 10 m/sec direct insertion
Mechanical Specifications
Ingress ProtectionIP66 in accordance with BS EN 60529
(current version);
NEMA 4 ingress protection in accordance with
NEMA 250 (current version)
Housing Material316 stainless steel
DimensionsL = 133 mm x ø45 mm (with connector cable)L = 156 mm x ø45 mm (with connector cable)
Filter (Sensor Protection)Standard: HMWPE <10 μm Optional: 316 stainless steel sintered guard <80 μm
Process Connection5/8” 18 UNF
3/4” 16 UNF
G1/2” BSP
Weight150 g (excluding connector cable)
Electrical ConnectionsMiniDIN 43650 form CM12 5 pin (A coded)
Mating Electrical ConnectionsMating connector supplied as standard
Optional 0.8, 2, 5, 10 metre 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


Compressed Gas 

Related Products

SF52 SF52
A simple, cost effective sensor designed for use in harsh industrial dryer applications where reliability and toughness are required at an economical cost.
Easidew TX I.S. Easidew I.S. Dew-Point Transmitter
The Easidew I.S. (intrinsically safe) transmitter is a dew-point transmitter designed and certified for use in hazardous area applications...
Senz TX Senz-TX *
The Ntron Senz-Tx Oxygen Sensor Transmitter is a highly reliable and cost-effective two-wire, loop-powered transmitter
* This link will take you to Ntron
mdm300 MDM300
A high-speed portable dew-point hygrometer, offering rapid spot-check measurements of dew point or moisture content in many applications, including compressed air, natural gas and highvoltage switchgear quench gas.
SF82 Online SF82 Online
This panel mount display combines with the fast moisture response transmitter series offering digital and analog outputs, alarms and an easy to read display.
s8000rs S8000 RS
The S8000 RS chilled mirror sensor directly measures the formation of condensation, giving long-term and unmatched, drift-free readings of dew-point and relative humidity.
RMS Data Monitoring RMS Data Monitoring *
A continuous monitoring system that delivers measured data reliably. The adaptive RMS Rotronic Monitoring System is the perfect solution for a wide range of applications.
* This link will take you to Rotronic
The MDM50 Hygrometer has been designed to make high-speed spot checks of the dew point in air and gases to -50°C dew point as simple as possible. This completely self-contained instrument weighs only 4kg and is delivered ready to use.