DWYER 645 Wet/Wet Differential Pressure Transmitter

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Description

Series 645 Wet/Wet Differential Pressure Transmitter,±0.25% Accuracy, Quick Response, 2-Wire Design

 

DWYER 645 Wet/Wet Differential Pressure Transmitter are designed for use with compatible gases and liquids which can be applied to both the pressure and reference ports. Quick response capacitance sensor delivers a 4 to 20 mA output signal proportional to differential pressure with ±.25% accuracy. The DWYER 645 Wet/Wet Differential Pressure Transmitter are ideal for process control, filter condition monitoring, refrigeration equipment, pump speed control, HVAC equipment, and liquid level measurement. For ease of installation and maintenance, order optional 3-valve manifold assembly. Bleed ports allow for total elimination of air in the line and pressure cavities.

 

Features

  • Versatile, high-accuracy device for liquid or gas supports designs requiring more precise measurements in support of application
  • Optional 3-way valve manifold supports simplifying installation or removal of transmitter without interrupting process

 

Specifications

  • Service: Compatible gases or liquids on both pressure and reference sides.
  • Wetted Materials: 17-4 PH stainless steel, 300 Series stainless steel, fluoroelastomer and silicone O-rings and bleed screw seals.
  • Accuracy: ±0.25% FS (RSS).
  • Temperature Limits: Operating: 0 to 175°F (-22 to 80°C); Storage: -65 to 260°F (-54 to 126°C).
  • Pressure Limits: (High side) 1 to 5 psi: 20 x FS, 10 to 25 psi: 10 x FS, 50 psi: 5 x FS, 100 psi: 2.5 x FS; (low side) 2.5 x FS.
  • Thermal Effects: (includes zero and span) ±0.02% FS/°F, 30 to 150°F (-1 to 65°C).
  • Power Requirements: 11 to 30 VDC.
  • Output Signal: 4 to 20 mA, 2-wire.
  • Zero and Span Adjustments: Adjustable, ±1 mA, non-interactive.
  • Response Time: 30 to 50 ms.
  • Loop Resistance: 0 to 1000Ω.
  • Electrical Connection: Barrier strip terminal block with conduit enclosure and .875″ (22 mm) diameter conduit opening.
  • Process Connection: 1/4″-18 female NPT.
  • Housing: Stainless steel/aluminum, NEMA 4X (IP56).
  • Weight: 14.4 oz (0.4 kg).
  • Agency Approvals: CE.
  • 3-Valve Manifold Assembly
  • Manifold: Brass.
  • Valve Type: 90° on/off.
  • Process Connection: 1/4″-18 female NPT.

 

 

Models & Ordering

Standard

Model Description
645-0 Wet/wet differential pressure transmitter, range 0-1 psid.
645-1 Wet/wet differential pressure transmitter, range 0-2 psid.
645-10 Wet/wet differential pressure transmitter, range ±0.5 psid.
645-11 Wet/wet differential pressure transmitter, range ±1 psid.
645-12 Wet/wet differential pressure transmitter, range ±2.5 psid.
645-13 Wet/wet differential pressure transmitter, range ±5 psid.
645-14 Wet/wet differential pressure transmitter, range ±10 psid.
645-15 Wet/wet differential pressure transmitter, range ±25 psid.
645-16 Wet/wet differential pressure transmitter, range ±50 psid.
645-2 Wet/wet differential pressure transmitter, range 0-5 psid.
645-3 Wet/wet differential pressure transmitter, range 0-10 psid.
645-4 Wet/wet differential pressure transmitter, range 0-25 psid.
645-5 Wet/wet differential pressure transmitter, range 0-50 psid.
645-6 Wet/wet differential pressure transmitter, range 0-100 psid.

 

With 3-Valve Manifold Assembly

Model Description
645-0-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-1 psid.
645-1-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-2 psid.
645-10-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±0.5 psid.
645-11-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±1 psid.
645-12-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±2.5 psid.
645-13-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±5 psid.
645-14-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±10 psid.
645-15-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±25 psid.
645-16-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range ±50 psid.
645-2-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-5 psid.
645-3-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-10 psid.
645-4-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-25 psid.
645-5-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-50 psid.
645-6-3V Wet/wet differential pressure transmitter with 3-valve manifold assembly, range 0-100 psid.

 

 

 

Additional information

Model

645-0, 645-1, 645-10, 645-11, 645-12, 645-13, 645-14, 645-15, 645-16, 645-2, 645-3, 645-4, 645-5, 645-6, 645-0-3V, 645-1-3V, 645-10-3V, 645-11-3V, 645-12-3V, 645-13-3V, 645-14-3V, 645-15-3V, 645-2-3V, 645-3-3V, 645-4-3V, 645-5-3V, 645-6-3V

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