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Instantly add the Series 657-1 Relative Humidity/Temperature Transmitter and 50,000+ more product series to your store or catalog  
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Dwyer Relative Humidity/Temperature Transmitter, Series 657

Series 657-1 Relative Humidity/Temperature Transmitter

Brand: Dwyer Instruments, LLC
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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 ±° 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)

1 - 4 of 4 Part Numbers
657-1
657-1
  • Model - RH / Temperature Transmitter
  • Certificates - None
657-1-NIST
657-1-NIST
  • Model - RH / Temperature Transmitter
  • Certificates - NIST Traceable Calibration Certificate
657C-1
657C-1
  • Model - RH / Temperature Transmitter - Conduit Housing
  • Certificates - None
657C-1-NIST
657C-1-NIST
  • Model - RH / Temperature Transmitter - Conduit Housing
  • Certificates - NIST Traceable Calibration Certificate
1 - 4 of 4 Part Numbers

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Specifications

Brand

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

Documentation

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Manuals

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