Michell SF72 Dew Point Sensor for Compressed Air Dryer

The SF72 dew-point transmitter is a compact sensor designed for use in industrial dryer applications at the key -80 to +20°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 -80 to +20°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 connections

Performance
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 -80 to +20°C     Non-standard available upon request
Supply voltage                             12-28 VDC
Load resistance                          Max 250 Ω @ 12 V (500 Ω @ 24 V)
CE marked Certified

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

About our company

Hangzhou Xinjian Electronic Co., LTD. is an ISO9001 certified manufacturer, and also is a hi-tech company. It has been specialized in designing and producing industrial control solution since 1997. All products are designed and made for the global market, and we've offered OEM/ODM service to world-class brands. We have been highly recognized not only for its good quality but also excellent after-dales services both in domestic and international market.