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The Optidew Vision precision dewpointmeter is based on the proven, fundamental optical dew-point measurement principle, giving long-term unmatched drift-free performance. It offers a wide measurement range from the equivalent of <0.5 to 100% RH at ambient temperatures from -40 to +190°F. Optidew Vision provides two linear 4-20 mA outputs and RS232 serial communications, allowing configuration and monitoring by a suitable computer or PLC system or via specific Optidew logging software. An adjustable isolated alarm contact means that Optidew Vision can be used for direct process control.