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, CE and CSA
listed, and FM approved.
CAUTION:
FOR USE ONLY WITH AIR OR COMPATIBLE GASES.
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, FM.
OPTIONS - Consult
Factory for Pricing
Weatherproof Housing
16 ga. steel enclosure with gasketed cover (NEMA 4, IP66)
for wet or oily conditions. Withstands 200 hour salt spray
test. Wt. 5 lbs (2.3 kg). Switch must be factory installed.
Change 1910 base number to 1911 and add –WP suffix. Example:
1911-1-WP.
Explosion-proof Housing
Cast iron base with brass cover. Rated Class I, Group
D; Class II, Groups E, F, G. (7 lbs). Switch must be factory
installed. Change model number to 1911 and add –EXPL suffix.
Example: 1911-1-EXPL.
Explosion-proof Cast Housing, Model 1911- CN Explosion-proof
housing, NEMA 7 & 9. Change base number to 1911 and
add -CN suffix. Example: 1911-1-CN.
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. NOTE:
Manual Reset (MR) option for use only in single positive
pressure applications.
ACCESSORIES
-- See "Ordering" Page
A-399 Duct Pressure Monitor Kit for use with standard or manual reset model switches. Includes
mounting flange, tubing and adaptors.
A-329 Street
Ell Brass adaptor for applications
requiring right angle connections. Two required for differential
pressures.
