Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Product Manual
For Moisture Control in Rail Rolling Stock Compressed Air Dryers
Features
M12 electrical connector
Dew-point measurement range –60 to +60 °Cdp (-76 to +140°Fdp)
Fast response
316 stainless steel IP66 construction
Traceable calibration certificate
Accuracy ±2°Cdp (±3.6°Fdp)
G 1/2” BSP process connection
A cost-effective moisture transmitter designed to continuously monitor the performance of the compressed air dryers on railway rolling stock to ensure the safety and efficiency of braking and other systems.
Using Michell’s latest generation of polymer moisture sensor to provide fast, reliable readings of dew-point, allowing for fast action to be taken by operators.
The transmitter itself has a heavy duty M12 electrical connector and is calibrated to measure within the range of -60 to +60°C dew point: wide enough to cope with extreme conditions found in railways around the world.
Specification
| Performance | ||||
| Measurement range (dp) | –60...+60°C (-76...+140°F) dew point | |||
| Accuracy (dp) | ±2°C (±3.6°F) dew point | |||
| Repeatability | ±0.2°C (±0.36°F) dew point | |||
| Long-term stability | Less than 1% per year at reference conditions | |||
| Calibration | Traceable 8-point calibration certificate | |||
| Electrical Specifications | ||||
| Output signal | 4-20 mA (2-wire connection, current source) | |||
| Output | Dew point | |||
| Analog output scaled range |
Standard: –60...+60°C (-76...+140°F) Non-standard available upon request |
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| Supply voltage | 12...28 V DC | |||
| Load resistance |
Max 250 Ω @ 12 V (500 Ω @ 24 V) 500 Ω @ 24 V |
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| Compliances | CE & UKCA | |||
| Operating Specifications | ||||
| Start-up temperature |
Ambient: -40...+50°C (-40...+122°F) Gas: –40...+70°C (-40...+158°F) |
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| Operating temperature |
Ambient: -40...+50°C (-40...+122°F) Gas: –40...+60°C (-40...+140°F) |
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| Storage temperature | –40...+85°C (-40...+185°F) | |||
| Operating pressure | 45MPa (450 barg/6526 psig) maximum | |||
| Over pressure rating | x2 operating pressure 90 MPa (900 barg/13053 psig) | |||
| Flow rate |
1...5 Nl/min mounted in standard sampling block; 0...10m/sec (0...32.8 fps) direct insertion insertion |
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| Thermal compensation | Characterized over operating range | |||
| Mechanical Specifications | ||||
| Ingress protection | IP66 in accordance with standard BS EN 60529:1992 | |||
| Housing material | 316 stainless steel | |||
| Dimensions | L=119mm (4.69”) (including HDPE filter) x ?27mm (?1.06”) | |||
| Filter | Standard: HDPE guard <10μm | |||
| Process connection and material | G 1/2” BSP, 316 stainless steel | |||
| Weight | 150g (5.29oz) | |||
| Electrical connections | M12, 4 pin (A coded) | |||
| Digital diagnostic communications | RS485, 2-wire Modbus RTU | |||
|
Diagnostic conditions (factory programmed) |
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| Rail Certifications | ||||
| Shock and vibration | IEC 61373:1999-01 (EN 50155) | |||
| RFI/EMC emissions and immunity | EN 50121-3-2:2016 | |||
Suitable Applications
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