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Clark Solutions
1910 Compact Low Differential Pressure Switches
Set points from 0.07" to 20" W.C., Repetitive accuracy within 3%..
DESCRIPTION
The 1900 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 inches (1.8 to 508 mm) w.c. Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. U.L. and C.S.A. listed, FM and CENELEC approved(unlisted model 1911-CE).
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SPECIFICATIONS
PHYSICAL DATA
Temperature limits: -30°F(-34°C) for dry air or gas) to
180°F(82.2°C).
Maximum surge pressure: 10 psig (0.7 bar).
Rated pressure: 45" (114 cm) w.c.
Pressure connections: 1/8" NPT.
Electrical rating: 15 amps, 120-480 volts, 60 Hz. A.C.
Resistive 1/8H.P. @ 125 volts,1/4 H.P. @ 250 volts,
60 Hz. A.C. Derate to 10 amps for operation at high
cycle rates.
Wiring connections: 3 screw type, common, normally
open and normally closed.
Set point adjustment: Screw type inside conduit
enclosure.
Housing: Aluminum die casting with chemical
conversion coating for corrosion protection; zinc
plated steel stamping.
Diaphragm: Molded Silicone rubber. Aluminum
diaphragm plate.
Calibration spring: Stainless steel.
Weight: 1lb. (454 g)
Installation: Diaphragm vertical.
SPECIAL MODELS AND ACCESSORIES
1900-5-MR-DPK DUCT PRESSURE MONITOR includes special 1.4 to 5.50” (35 to 140 mm) w.c. range 1900 pressure switch with manual reset snap switch. Unit prevents duct blowout by shutting down
blower when excess pressure occurs. Won't allow blower restart until condition is corrected and switch is manually reset. Includes switch, duct pressure sensor, tubing and adapters.
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.
Explosion-Proof Housing Cast iron base with brass cover. Rated Class I, Div. 1 & 2, Groups C, D; Class II, Div. 1 & 2, Groups E,F,G; Class III and NEMA 7 CD, 9 EFG. (7 lbs). Switch must be factory installed. Change
model to 1911 and add -EXPL suffix.
For assistance call 978-568-3400
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A-329 STREET ELL Brass adapter for applications requiring right angle connections. Two required for differential pressures.
Weatherproof Housing 16 ga. steel enclosure with gasketed cover (NEMA 4) for wet or oily conditions.
Withstands 200 hour salt spray test. Wt. 5 Ibs. (2.3 kg). Switch must be factory installed. Change 1910 base number to 1911 and add -WP suffix.
Example: 1911-1-WP.
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ORDERING INFORMATION
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FOR YOUR CONVENIENCE, THESE ITEMS ARE AVAILABLE
ONLINE OR PLEASE CALL 1-800-253-2497 TO ORDER |
| Model |
Operating Range, in w.c. |
Approximate Dead Band |
| Min Set |
Max Set |
| 1910-00 |
0.7 to 0.15 |
0.04 |
0.04 |
| 1910-0 |
0.15 to 0.55 |
0.10 |
0.10 |
| 1910-1 |
0.40 to 1.6 |
0.15 |
0.16 |
| 1910-5 |
1.4 to 5.5 |
0.30 |
0.30 |
| 1910-10 |
3.0 to 11.75 |
0.40 |
0.40 |
| 1910-20 |
4.0 to 20.0 |
0.40 |
0.50 |
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CAUTION: FOR USE ONLY WITH AIR
OR COMPATIBLE GASES
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