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Series 657-1 Relative Humidity/Temperature Transmitter
Brand: Dwyer Instruments, LLCThe 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 ±° F for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below.
Features- 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)
Specifications
Accessories
- Mounting Gland
- Split Flange
Accuracy
- ± 0.5° C (1° F)
- ± 2 % (10 to 90 %) - RH
- ± 3 % (0 to 100 %) - RH
Compensated Temperature
- 0° to 60° C (32° to 140° F)
Electrical Connectors
- 4 Screw Typical Terminals
Humidity
- 0 to 100 % Relative Humidity
Media
- Humidity & Temperature Detection in Air
Mounting Position
- Any Orientation
NACE & NIST
- NIST Traceable Humidity Calibration Certificate
Output
- 4-20 mA - (2-Channels Each Loop Powered on the RH Channel)
Power Requirement
- 10-35 Vdc
Sensor / Probe Diameter
- 5/16˝ x 10˝ (0.8 x 25.4 cm)
- 5/16˝ x 9-1 / 10˝ (0.8 x 23.1 cm)
Sensor / Probe Material
- Stainless Steel
Sensor / Probe Type
- RH
Supply Pressure
- psi: 1 (kPa: 7, bar: 0.07)
Temperature Range
- 0° to 100° C (32° to 212° F)
- Cleanroom monitoring
- HVAC/building control monitoring
