The Michell Instruments SF82 online dew-point hygrometer is a fast-response hygrometer system for the complete dew-point measurement range of -60 to 60°C (-76 to 140°F) dew point, which covers many moisture measurement applications from membrane dryers, adsorption dryers, medical and surgical air, breathing air, additive manufacturing, glove boxes, and plastic injection molding .

The SF82 hygrometer incorporates advanced thick film technology that provides stable, reliable and repeatable moisture measurements with an accuracy of ±2°C (±3.6°F) dew point. It includes 3 digital and analog output signals (4-20mA and Modbus RTU over RS485) which can be set up within the menu system, along with 2 alarm relays .

The system is supplied complete with all the parts needed to install the sensor in a gas stream and start measuring quickly and easily. It includes a configurable display with 1/8 DIN mount format, power supply of 85 to 264VAC, and a 9-point calibration certificate from -60 to 20°C dew point traceable to national standards. Maximum operating pressure is 1450 psi, with an optional stainless-steel sensor sample block having 1/8in NPT inlet and outlets available. A Sensor Exchange program is available for easy maintenance .

Key Features

• Measurement range: -60 to 60°C (-76 to 140°F)
• Accuracy: ±2°C dew point
• Advanced thick film sensor technology
• 4-20mA and Modbus RTU over RS485 outputs
• 2 alarm relays
• Configurable 1/8 DIN display
• 85 to 264VAC power supply
• Maximum operating pressure: 1450 psi
• Traceable 9-point calibration certificate
• Sensor Exchange program available
• Quick and easy installation

Applications

• Membrane dryers
• Adsorption dryers
• Medical and surgical air
• Breathing air
• Additive manufacturing
• Glove boxes
• Plastic injection molding