The SF82 Online is a compact, fast-response dew-point hygrometer system designed for easy installation and maintenance. It measures and displays dew point and moisture content across a wide range of humidity applications, featuring analog, digital, and dual relay alarm outputs.

• Wide Measurement Range: -60 to +60 °Cdp, with non-standard and ppm ranges available on request
• Accuracy: ±2 °Cdp with advanced thin-film polymer sensing technology
• Fast Response: T95 < 3 minutes at -60 °Cdp for rapid moisture change detection
• Multiple Outputs: 4-20 mA or 0-20 mA analog, Modbus RTU RS485 digital, and 2 programmable alarm relays
• Integrated System: Includes sensor, sampling block with 1/8" NPT inlet/outlet, cable, and 1/8 DIN panel-mount display
• High Pressure Rating: Up to 10 MPa (100 barg)
• Robust Construction: 316 stainless steel sensor housing with IP66 protection
• Traceable Calibration: 9-point calibration certificate from -60 to +20 °Cdp, traceable to national standards
• Flexible Power: 85-264 V AC universal power input

• Membrane dryers
• Desiccant dryers
• Medical and surgical gases
• Breathing air quality monitoring
• Additive manufacturing (3D printing)
• Glove boxes
• Plastic injection molding

The SF82 sensor features a built-in diagnostic interface accessible via the Michell sensor communication tool, providing sensor information including last calibration date and diagnostic results. Michell offers recalibration services to ensure ongoing traceability and minimal downtime.

All three output signals (analog, digital, and relay) can be reconfigured through the display menu system. Sensor diagnostics include factory-programmed fault conditions: 23 mA for sensor fault, 4 mA for under-range, and 20 mA for over-range.