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DWYER 657 relative humidity & temperature transmitter

The Series 657 Relative Humidity/Temperature Transmitters provide two 4-20 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.

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Made in USA. brand DWYER, model 657

Fast delivery to Latvia, Estonia and Lithuania. International delivery to Europe, Asia, Africa and other continents available on request
Our warehouse is located in Riga, Latvia.

Retailprice from $367.1

Available

Available

Founded in 1931, DWYER manufactures equipment for measurement, conversion and control – pressure, temperature, level, flow.

Advantages

Official distributor in Latvia

Time-tested American, European and Asian brands of control and measurent instruments

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Special price list for organisations

We offer a significant discount for trade organisations and manufacturing companies

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Worldwide shipping on request

We take care of all logistics and customs clearance. Fast delivery to Baltic countries

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After-sales service and support

Warranty service and repair, expert assistance in the operation of the instruments

Description of DWYER 657

PRODUCT APPLICATIONS

  • Cleanroom monitoring
  • HVAC/building control monitoring

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)

Technical specifications of DWYER 657

  • Service: Dry clean air.
  • Range: Relative humidity: 0 to 100%; Temperature: 32 to 212°F (0 to 100°C).
  • Accuracy: Relative humidity: ±2% (10 to 90% RH), ±3% (0 to 10% and 90 to 100% RH); Temperature ±1°F (0.5°C).
  • Temperature Limits: 32 to 140°F (0 to 60°C).
  • Pressure Limits: 1 psi (0.7 bar).
  • Compensated Temperature Range: 32 to 140°F (0 to 60°C).
  • Power Requirements: 10-35 VDC.
  • Output Signal: 2 channels each 4-20 mA. Loop powered on the RH channel.
  • Electrical Connections: 4 screw type terminals.
  • Mounting Orientation:: Mount in any position.
  • Probe: 657-1: SS 5/16″ x 10″ (0.8 x 25.4 cm); 657C-1: 5/16˝ x 9-1/10˝ (0.8 x 23.1cm).
  • Weight: 657-1: 5.5 oz (156 g); 657C-1: 10 oz (284 g).

How to buy DWYER 657

Model Description Price
657-1 Relative humidity/temperature transmitter.
$367.10
657C-1 Relative humidity/temperature transmitter.
$406.65
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Accessories for DWYER 657

Model Description Price
A-159 Mounting gland. Versatile adapter slips on any Series 160, 5/16″ standard pitot tube made after Dec. 1990. Two-part stainless steel fitting slides over tube and provides permanent, secure mounting. Where duct interior is accessible, use the washers and jam nut supplied. For blind applications or in thicker materials, use model A-156 flange mounting plate. Once tube is adjusted to proper depth and angle, tighten smaller hex bushing to lock position. Graphite bushing inside assures leak-proof seal even at higher temperatures. TFE bushing also available. Note: For full insertion with this fitting, order next longer pitot tube. A-159 mounting gland is used for both duct mounting and flange mounting.
$37.40
A-158 Split flange mounting. Can be added to any Dwyer® No. 160 standard pitot tube. Zinc plated steel. Gasket is pattern for mounting holes. Secure flange loosely to tube, adjust tube depth and tighten screws. Gasket of 1/16″ Neoprene fits tightly around tube and against duct for leak-proof seal. Nuts, washers included.
$19.10
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User Guide and Instruction manual for DWYER 657

You can request the necessary certificates, documentation, instructions and user guide for DWYER 657 using the special form.

You can buy DWYER 657 in Latvia at a price starting from367.1 $ in «OLIL SIA» by leaving a request on the website, by phone +371 672 70580 or by email . DWYER 657 price are subject to change depending on exchange rates. We deliver instruments by transport companies in Latvia, Estonia and Lithuania. Worldwide shipping to Europe, Asia, Africa, North and South America available on request.