Dimensions
Figure 1:
Mount with the diaphragm in
any vertical plane.
Figure 2:
The sample line connections
for typical applications.
Figure 3:
Before pressure is applied to
the diaphragm, the switch contacts are in
the normally closed (NC) position.
Figure 4:
Before pressure is applied to
the diaphragm, the switch contacts are in
the normally closed (NC) position.
SPECIFICATIONS
MODEL FS-751-112
AIR PRESSURE SENSING
SWITCH
WITH FIXED SET POINT
Mounting Position:
Mount with the diaphragm in any vertical plane to
obtain specified operating set point.
Set Point:
Fixed to operate on pressure rise at
0.05±0.02"w.c.(1.27±0.508 mm)
Switching Differential (Approximate):
0.02±0.01"w.c.
(0.508±0.254 mm w.c.)
Measured Media:
Air, or combustion byproducts that will not
degrade silicone.
Maximum Pressure:
½ psi (0.03 bar)
Operating Temperature Range:
–40 ºFto 180 ºF
(–40.0 ºC to 82.2 ºC)
Life:
100,000 cycles minimum at ½ psi maximum
pressure each cycle and at maximum rated
electrical load.
Electrical Rating:
300 VA pilot duty at 115 to 277 VAC; 15 amp
noninductive to 277 VAC, 60 Hz.
Contact Arrangement:
SPDT
Electrical Connections:
Screw-type terminals with cup washers.
Sample Line Connector:
Two barbed ¼" connectors, suitable for slip-on
flexible tubing.
Shipping Weight:
1.2 lbs
Approvals:
UL, CSA.
