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)  

STOCKED MODELS
657C-1 RH/Temperature Transmitter.................
NO.A-158 Split Flange Mounting Kit................
NO.A-159 Duct Mounting Gland......................