Wet Differential Pressure Transmitter Dwyer Series 645-0

Wet Differential Pressure Transmitter Dwyer Series 645

• Series 645 Wet/Wet Differential Pressure Transmitters 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 Series 645 transmitters 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.

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.