Series
1900
Compact Low
Differential Pressure
Switches
Set Points from 0.07" to 20" w.c., Repetitive
Accuracy within 3%
Series 1910 pressure switch. All pressure and electrical connections and set point adjustments are on one side for easy
installation.
Series 1910 switch with conduit enclosure off. Shows electric switch and set point adjustment screw.
Our most popular series
combines
advanced design and precision construction to
make these switches able to perform many of
the tasks of larger, costlier units. Designed for
air conditioning service, they also serve many
fluidics, refrigeration, oven and dryer
applications. For air and non-combustible
compatible gases, Series 1900 switches have
set points from 0.07 to 20" w.c. (1.8 to 508
mm). Set point adjustment is easy with range
screw located inside conduit enclosure.
Internal location helps prevent tampering. UL
and CSA listed, FM and CENELEC approved.
SPECIAL MODELS AND ACCESSORIES
Manual Reset Model 1900 MR
includes
special snap switch which latches on pressure
increase above the setpoint. Switch must be
manually reset after pressure drops below the
setpoint. To order, change base model to
1900 and add MR suffix after range number.
Example: 1900-10-MR. Available on -1, -5, -
10, or -20 ranges only. Option is not UL, CSA
or FM listed.
SPECIFICATIONS
Service:
Air and non-combustible, compatible
gases.
Wetted Materials:
Consult Factory.
Temperature Limits:
-30 to 180°F (-34 to
82.2°C).
Pressure Limits:
45" w.c. (11.2 kPa)
continuous, 10 psig (68.95 kPa) surge.
Switch Type:
Single-pole double-throw
(SPDT).
Repeatability:
±3%.
Electrical Rating:
15 A @ 120-480 VAC, 60
Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @
250 VAC, 60 Hz. Derate to 10 A for operation
at high cycle rates.
Electrical Connections:
3 screw type,
common, normally open and normally closed.
Process Connections:
1/8" female NPT.
Mounting Orientation:
Diaphragm in vertical
position. Consult factory for other position
orientations.
Set Point Adjustment:
Screw type inside
conduit enclosure.
Weight:
1 lb 4.5 oz (581 g).
Agency Approvals:
CE, UL, CSA, Cenelec,
FM.
Exhibit S-1
Summary of Contents for BELTOMATIC
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