657-1
Relative Humidity/Temperature Transmitter
657-1
Relative Humidity/Temperature Transmitter
The
Model 657-1 Transmitter provides two 4-20 mA channels to produce
separate output signals for both relative humidity and temperature. This
inexpensive device delivers ±2% accuracy for humidity and ±3%
for temperature measurements. The sensor employed in the 657-1 features
a state-of-the-art integrated polymer film humidity sensor and a thin-film
platinum temperature sensor to assure high reliabilitv and rock-solid stability
over years of continuous service. Stainless steel probe measures 5/16"
x 10" (0.8 x 24.4 cm) and can be easily mounted to most ductwork using
either of the two optional kits below.| Relative Humidity Range | 0 to 100% |
| RH Accuracy | ±2% (10-90% RH);
±3% (0-10% and 90-100% RH) |
| Operating Temperature Range | 32 to 158°F (0-70°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 (0-70°C) |
| Storage Temperature Limits | -40 to 176°F (-40 to 80°C) |
| Housing | ABS Plastic |
| Sensor Probe | 5/16" x 10" (0.8x25.4cm) stainless steel |
| Cable Length | 48 inches (1.22 metres) |
| Weight | 5.5 oz. (156 g.) |
Phone: 604-254-9622
Fax: 604-254-3123
e-mail: info@johnsherman.com