ZA-3501 portable dew point meter: 1.can be used for detecting non-corrosive gas 2.High-performance dew point transmitter ZA-3501 ... real-time measurement, curve display, power supply management, time system, file system, data inquiry and network communication into an organic whole, domestic ... -round way!ZA-3501 Portable Dew Point Meter can be used for detecting non-corrosive gas, such as H2, SF6 and N2 ...