Dwyer Series 644 Industrial Pressure Transmitter

Product Description

±0.05% FS, <±0.25% FS Total Error Band The Series 644 Industrial Pressure Transmitter is a robust transmitter designed for high accuracy pressure applications. Boasting an accuracy of ±0.05% FS RSS (<±0.25% TEB), the 644 is intended for precise measurements in the critical applications of calibration technology, hydraulic/pneumatic controls, and many more laboratory and industrial settings. The Series 644 offers multiple measurement options with two output choices (VDC or mA) and ten psig pressure ranges (optional 0 to 15 psia). The robust and compact all stainless steel Series 644 is available with either a 1/4" male NPT, or 7/16"-20 male SAE process connections. Each transmitter is provided with an 11 point NIST traceable calibration certificate. Product Applications

• Calibration equipment
• Test benches
• Pulp and paper mills
• Hydraulic/pneumatic controls
• Transportation
• Power generation

Specifications

Service:

Compatible gases and liquids.

Wetted Materials:

17- 4 PH SS.

Accuracy:

±0.05% FS RSS.

Total Error Band (Includes all thermal effects):

<±0.25% FS over entire temperature compensated range.

Stability:

<0.15% FS/year.

Temperature Limits:

-40 to 185°F (-40 to 85°C).

Pressure Limits:

Proof pressure and burst pressure: See pressure limits table below.

Compensated Temperature Range:

-4 to 140°F (-20 to 60°C).

Power Requirements:

9 to 30 VDC for current output; 15 to 30 VDC for voltage output.

Minimum Supply Voltage:

Min. supply voltage (VDC) for current output = 9 + 0.02 x loop resistance Ω (loop resistance Ω = line resistance + receiver resistance).

Output Signal:

0 to 10 VDC (4-wire); 4 to 20 mA (2-wire).

Response Time:

<10 ms (voltage output), <80 ms (current output).

Max Current Consumption:

4 to 20 mA: 22 mA; 0 to 10 VDC: 20 mA.

Electrical Connections:

3 ft cable or 6-pin male bayonet connector.

Process Connection:

1/4″ male NPT or 7/16″-20 male SAE with O-Ring.

Enclosure Rating:

NEMA 4X (IP65).

Mounting Orientation:

Vertical.

Weight:

9 oz (254 g).

Agency Approval:

CE.

Features

• High accuracy: ±0.05% FS RSS
• 15 to 1000 psig ranges (optional 0 to 15 psia)
• Two output options
• Low thermal error over wide temperature range
• NIST calibrated to provide traceability for regulated processes where production and
  documentation is monitored

Literature

Manuals

644

Catalog Pages

Series 644 Catalog Page

Approvals

CE Approval

Drawings

• CAD Drawing in format .DWG
• Adobe Reader in format .PDF

Accessories

Model Chart