Umidade

The Model 657C-1 Transmitter features the same circuit design as the 657-1 providing two 4 - 20 mA channels to produce separate output signals for both relative humidity and temperature. However, this model is housed in a tough die cast aluminum protective conduit enclosure with gasketed cover. An internal terminal block is provided for electrical connections. The sensor employed in the 657C-1 features a state-of-the-art integrated polymer film humidity sensor and a thin-film platinum temperature sensor to assure high reliability and rock-solid stability over years of continuous service. Stainless steel probe measures 5/16" x 9 1/10" (0.8 x 23.1 cm) and can be easily mounted to most ductwork using either of the two optional kits below.

PHYSICAL DATA

Relative Humidity Range:		0 - 100%
Rh Accuracy:		± 2% (10 - 90% Rh), ± 3% (0 - 10% and 90 - 100% Rh)
Operating Temperature Range:		32 to 158°F (0 to 70°C)
Temperature Measurement Range:		32 to 212°F (0 to 100°C)
Temperature Accuracy:		± 1°F (0.5°C)
Output:		2 channels, each 4 - 20 mA, loop powered on Rh channel
Power Supply:		10 - 35 VDC
Ambient Operating Temperature Limits:		32 to 158°F (0 to 70°C)
Storage Temperature Limits:		-40 to 176°F (-40 to 80°C)
Housing:		Die cast aluminum
Conduit Connection:		½"
Sensor Probe:		5/16" x 9 1/0" (0.8 x 23.1 cm) stainless steel
Weight:		10 oz (284 gr)