Starting at $428.30USD
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Dwyer

657-1/657C-1 Relative Humidity/Temperature Transmitter

Dual 4 - 20 mA channels for simultaneous relative humidity and temperature outputs

Starting at
$428.30USD
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Have questions? We're here to help!
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Used in
657 1657 C 1 Relative Humidity Temperature Transmitter 05222
657 1 2

The Series 657 Transmitters provide two 4 to 20 mA channels to produce separate output signals for both relative humidity and temperature. These devices deliver ± 2% accuracy for humidity and ± 1°F for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below.

• Polymer film humidity and thin film RTD temperature sensors offer highly reliable and stable measurements
• Remote mount housing offers installation flexibility (657-1)
• Rugged die-cast aluminum housing is great for industrial applications (657C-1)

Service657-1: Dry clean air
657C-1: Humidity & temperature detection in air
RangeRelative Humidity: 0% - 100%;
Temperature: 32°F - 212°F (0°C - 100°C)
AccuracyRelative Humidity: ± 2% (10% - 90% RH), ± 3% (0% - 10% and 90% - 100% RH);
Temperature: ± 1°F (0.5°C)
Temperature Limits32°F - 140°F (0°C - 60°C)
Pressure Limits1 PSI (0.07 Bar)
Compensated Temperature Range32°F - 140°F (0°C - 60°C)
Power Requirements10 - 35 VDC
Output Signal2 channels each 4 - 20 mA. Loop powered on the RH channel
Electrical Connections4 screw type terminal
Mounting OrientationMount in any position
Probe657-1: 5/16 in x 10 in (0.8 cm x 25.4 cm) stainless steel
657C-1: 5/16 in x 9-1/10 in (0.8 cm x 23.1 cm) stainless steel
Weight657-1: 5.5. oz (156 g)
657C-1: 10 oz (284 g)

• Cleanroom monitoring
• HVAC/building control monitoring

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