Dwyer Instruments SERIES 1996 Catalog Page

REMOVABLE CONDUIT ENCLOSURE COVER

SERIES 1996

GAS PRESSURE SWITCH

Compact, Low Cost, 1.4 to 20 in w.c. Range

PRESSURE

Reliable and convenient, the Series 1996 Gas Pressure Switch serves as a compact,

low cost switch for gas red furnaces and equipment. Pressure ranges for both models

are ideal for high or low gas pressure interlock. Visible set point and on-off indicators
add convenience in servicing. Use either NO or NC contacts on SPDT switch. Bottom

connection has both 1/8˝ female and 1/4˝ male threads for pipe nipple or coupling. Top

connection vents diaphragm chamber to outside or to furnace combustion chamber.
Mount switch with diaphragm in a horizontal position and gas pressure connection at
bottom. Used with natural, manufactured or LP gas.uv

FEATURES/BENEFITS

• Visible set point and on-off indicator simplies operation and trouble shooting

• Compact size and low cost make it ideal for gas red or gas equipment OEM

applications

APPLICATIONS

• Gas furnaces • Natural, manufactured or LP gas applications

MODEL CHART
Model Range (in w.c.) Model Range (in w.c.)
1996-5 1.4 to 5.5 1996-20 4-20

3-1/8

[79.38]

3-1/2

[88.90]

SPECIFICATIONS
Service: Air, natural and manufactured gas, LP gas.

Wetted Materials: Consult factory.
Temperature Limits: 32 to 110°F (0 to 43.3°C). -30 to 110°F (-34.4 to 43.3°C) for

dry gas or dry air.

Pressure Limits: 45 in w.c. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge.
Switch Type: SPDT.
Electrical Rating: 15A @ 120-480 VAC, 60 Hz. Resistive 1/8 H.P. @ 125 VAC, 1/4

H.P. @ 250 VAC 60 Hz.

Electrical Connections: 3 screw type, common, normally open, normally closed.
Process Connections: 1/8˝ female NPT or 1/4˝ male NPT.
Vent Connection: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in horizontal position. Consult factory for other

position orientations.

Set Point Adjustment: Screw type with visible indicator, inside conduit enclosure.
Weight: 1 lb 2.3 oz (349 g).
Agency Approvals: CE, CSA, FM, UL.

Ø7/8 [22.23] OPENING FOR 1/2 CONDUIT CONNECTION
WINDOW AND VISIBLE ON-OFF INDICATOR

VENT CONNECTION ON OPPOSITE SIDE

1/4 NPT EXTERNAL THREAD [ALTERNATE GAS CONNECTION]
1/8 [F] GAS PRESSURE CONNECTION

uExplosion-Proof Alternative: See page 55 (Series 1950)

vExplosion-Proof Alternative: See page 55 (Series 1950G)