Dwyer Series 626 & 628 Industrial Pressure Transmitter

Product Description

Complete Offering of Ranges, Connections and Outputs

The Series 626 Pressure Transmitters possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X stainless steel general purpose housing or cast aluminum conduit housing.

The Dwyer Series 628 Pressure Transmitters are ideal for OEM’s with 1% full scale accuracy sensors. The transmitter is also available in the general purpose stainless steel housing and the cast aluminum conduit housing.

The corrosion resistant 316L stainless steel wetted parts allow the Series 626 and 628 transmitters to measure the pressure in a multitude of processes from hydraulic oils to chemicals. The Series 626 and 628 are available in absolute and pressure ranges with a variety of optional outputs, process connections and electrical terminations to allow you to select the right transmitter for your application.

Product Applications

• Compressors
• Pumping Systems
• Irrigation System Pressure
• Fire Pump Control Pressure
• Industrial Process Monitoring
• Refrigerant Line Pressures on Air Handlers when used with optional Refrigerant Valve Depressor
• Trash Compaction Equipment
• Hydraulic

Models

Specifications

Service:

Compatible gases and liquids.

Wetted Materials:

Type 316L SS.

Accuracy:

>626: 0.25% FS; 0.20% RSS;

628: 1.0% FS; 0.5% RSS;

626 Absolute Ranges: 0.5% FS; 0.35% RSS.

(Includes linearity, hysteresis, and repeatability).

Temperature Limit:

0 to 200°F (-18 to 93°C).

Compensated Temperature Range:

0 to 175°F (-18 to 79°C).

Thermal Effect:

±0.02% FS/°F. (includes zero and span).

Pressure Limits:

See Catalog page.

Power Requirements:

10-30 VDC (for 4-20 mA, 0-5, 1-5, 1-6 VDC outputs); 13-30
VDC (for 0-10, 2-10 VDC outputs); 5 VDC ±0.5 VDC (for 0.5-4.5 VDC ratio-metric
output).

Output Signal:

4-20 mA, 0-5 VDC,1-5 VDC, 0-10 VDC, or 0.5-4.5 VDC.

Response Time:

300 ms.

Loop Resistance:

0-1000 Ohms max. R max = 50 (Vps-10) Ohms (4-20 mA
output), 5K Ohms (0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output).

Stability:

1.0% FS/year (Typ.).

Current Consumption:

38 mA maximum (for 4-20 mA output); 10 mA maximum
(for 0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output); 140 mA maximum (for all
626/628/629-CH with optional LED).

Electrical Connections:

Conduit Housing (-CH): terminal block; 1/2″ female NPT conduit. General Purpose Housing (-GH): cable or DIN EN175801-803-C.

Process Connection:

1/4″ male or female NPT and BSPT.

Enclosure Rating:

NEMA 4X (IP66).

Mounting Orientation:

Mount in any position.

Weight:

10 oz (283 g).

Agency Approvals:

CE.

Features

• Metal Conduit Housing Option
• Robust 316L SS Oil Filled Sensor
• Compact Design
• NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
• A wide range of models and connections that can meet pressure measurement specifications from low to very high

Literature

Manuals

Instruction Manual

Catalog Pages

Series 626 & 628 Catalog Page

Approvals

CE Approval

Drawings

• dwg
• pdf
• 3D Drawing (626-GH_cable)
• 3D Drawing (626-GH-E4_DIN)

Accessories

	Model Number	Description
	A-240-D	Cooling tower, perforated, 1/4″ male/female BSPP.
	A-250-D	Cooling tower, spiral, 1/4″ male/female BSPP.
	A-251	Pressure snubber, brass, 1/4″ male/female BSPT.
	A-257	Pressure snubber, 316 SS, 1/4″ male/female BSPT.
	A-960	3′ packard cable.
	A-164	16.4′ (5 m) cable with M-12 4-pin female connector.

Model Chart

(1) Available with -GH Housing only
(2) Available with -CH Housing only
(3) LED option is not NEMA 4X.
(4) 628 only and 2.0%