Series-616W

Differential Pressure Transmitter, ± 0.25% Accuracy, NEMA 4X, 4-20 mA Output

NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
Zero and span controls provides easy calibration checks and shorter installation time to get device running and monitoring

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Series-616W

From ^SGD 628.74

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16 Variations available

See all series options below

Data Sheet

Product Overview

Accuracy Detail ± 0.25% FS @ 77°F (25°C), display accuracy ± 0.5%
Electrical Connection Screw Terminal
Enclosure Ratings IP66, NEMA Type 4X
Long Term Stability ± 1% FS/year
Materials, Wetted Consult Factory
Media Compatibility Clean dry air / inert gas, HVAC / room air, Inert / non-reactive gases, Helium, Nitrogen, Non-Conductive Gases, Non-Corrosive Dry Gases
Mounting Note Not Position Sensitive
Operating Temperature, Max 70 °C
Operating Temperature, Min -20 °C
Measurement Pressure Type Differential
Process Connection Note Barbed, dual size to fit 1/8˝ and 3/16˝ (3.12 and 4.76 mm) ID rubber or vinyl tubing
Process Connection Size 1/8 in, 3/16 in
Process Connection Type Stepped Barb Fitting
Series ID Series-616W
Span Adjustment Push Button
Supply Power Type AC/DC
Wire Gauge 26 to 16 AWG
Zero Setting Adjustable Range Push button

Supported Applications

The Dwyer Series 616W Differential Pressure Transmitter is designed to sense the pressure of air and non-combustible, compatible gases. The series measures positive, negative, and differential pressures within factory-calibrated ranges. Documented applications include dust collection systems, outdoor HVAC environments, and roof-top equipment.

Operating Conditions & Performance

The Series 616W operates in ambient temperatures from -4 to 158°F (-20 to 70°C). The unit is housed in a polycarbonate enclosure rated NEMA 4X (IP66) and can be mounted in any orientation. Performance specifications include:

Accuracy: ±0.25% FS @ 77°F (25°C); display accuracy of ±0.5%
Stability: ±1% FS/yr
Thermal Effect: ±0.02% FS/°F (±0.036% FS/°C)
Response Time: Instantaneous (default) or 3 s (selectable via DIP switch)

The transmitter supports measurement ranges from 0 to 1 in w.c. up to 0 to 25 kPa, including bidirectional spans such as 3-0-3 in w.c., 5-0-5 in w.c., and 10-0-10 in w.c. Maximum pressure limits vary by model range; for example, the 0 to 6 in w.c. range lists a maximum of 4.5 psig, while the 0 to 200 in w.c. range supports up to 45 psig.

Power and Electrical Specifications

The series offers flexible power configurations depending on output type:

Current Output (2-wire): 10-36 VDC; Loop resistance 0 to 1250 Ω max.
Voltage Output (3-wire): 17-36 VDC or isolated 21.6-33 VAC; Minimum load resistance 1 kΩ.
Current Consumption: 21 mA max continuous.

Electrical connections utilize a 4-wire removable European style terminal block for 16 to 26 AWG wire. Process connections feature barbed fittings compatible with 1/8" and 3/16" (3.12 and 4.76 mm) I.D. rubber or vinyl tubing.

Configuration Options

The Series 616W is available in multiple configurations to address specific installation needs:

Output Signals: Selectable 4-20 mA (2-wire), 0-5 VDC (3-wire), or 0-10 VDC (3-wire).
Display Options: Models with an LCD display provide local pressure indication and error messages; non-LCD models rely on remote signal monitoring.
Ranges: Available in inch water column (in w.c.) and kilopascal (kPa) units. Metric ranges are identified by model numbers containing "M".
Bidirectional Ranges: Specific models support negative-to-positive spans, such as 3-0-3 in w.c., 5-0-5 in w.c., and 10-0-10 in w.c.

The series includes zero and span adjustments via digital push-buttons for calibration checks. These controls are not intended for re-ranging to significantly different spans. An optional NIST traceable calibration certificate is available by adding the "-NIST" suffix to the model number.

Key Product Differences

Variants within the Series 616W differ primarily by measurement range, output signal type, and display presence. Models are designated with a numeric code corresponding to their specific pressure span (e.g., "-2" for 0 to 6 in w.c.). The addition of "LCD" indicates models equipped with a digital readout.

Models ending in "B" denote bidirectional ranges, while those containing "M" indicate metric units. For example: