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Dwyer Instruments 657-1 | Relative humidity/temperature transmitter
Part Number : 657-1
Two 4–20 mA channels are available on the Series 657, Model 657-1 Relative Humidity/Temperature Transmitters, enabling the production of independent output signals for relative humidity and temperature. These devices measure temperature with an accuracy of ±1°F and humidity with ±2%. Either of the two supplementary kits below can be used to mount a stainless steel probe to most ductwork with ease.
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