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Dwyer Series 681

Sanitary Pressure Transmitter
Meets 3A Sanitary Standards, No Liquid Fill Diaphragm, Tri-Clover Fitting
 

Dwyer Series 681The Series 681 Sanitary Pressure Transmitter is designed to meet 3A standards for applications in food, dairy, beverage and pharmaceutical processing, liquid level control, and sanitary pipelines. The unit is fully sealed to withstand high pressure washdown in Clean-in-Place (CIP) and Sterilize-in-Place (SIP) installations. The Series 681 is designed with a unique, no liquid fill diaphragm and a Tri-Clover sanitary pressure fitting for easy installation with negligible clamping effect. A conduit fitting, shielded cable with vent tube and sealed screws for zero and span adjustment combine to make the Series 681 completely watertight.

SPECIFICATIONS

Service: Compatible liquids and gases.
Wetted Parts: 316L Stainless Steel.
Accuracy: ±.20% FS (includes non-linearity, hysteresis and non-repeatability).
Temperature Limits: -40 to 260°F (-40 to 125°C) 10 to 90% RH, non-condensing.
Pressure Limits: See chart on "Ordering" page.
Compensated Temperature Range: 20 to 180°F (-7 to 80°C).
Thermal Effect: Zero and span shift: ±2.0% FS/100°F (% FS/50°C).
Power Requirements: 9-30 VDC.
Output Signal: 4-20 mA, 2-wire.
Zero and Span Adjustment: ±0.5 mA, non-interactive.
Response Time: ≤ 10 ms.
Loop Resistance: 800 ohms.
Electrical Connections: 1/2" conduit fitting and strain relief with 15 ft (4.5 m) cable.
Pressure Connection: 2" or 1-1/2" Tri-Clover fitting male NPT .
Clamping Effect: Zero and span shift: ±0.15% FS for ranges up to 30 psi; ±0.25% FS for ranges >30 psi.
Enclosure Rating: 304 Stainless Steel.
Weight: 8 oz (227 g).
Agency Approvals: 3A, CE.

 
Popular Models:
Model Number Range Overpressure Connection
 681-02 0-1 psi 50 psi 2" Tri-Clover
 681-12 0-2 psi 100 psi 2" Tri-Clover
 681-22 0-5 psi 150 psi 2" Tri-Clover
 681-32 0-10 psi 150 psi 2" Tri-Clover
 681-42 0-15 psi 150 psi 2" Tri-Clover
 681-52 0-30 psi 150 psi 2" Tri-Clover
 681-62 0-60 psi 150 psi 2" Tri-Clover
 681-72 0-100 psi 150 psi 2" Tri-Clover
 681-101 0-300 psi 1000 psi 1-1/2" Tri-Clover
 
 
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