Series 1900 Compact Low Differential Pressure Switches

Set Points from 0.07" to 20" w.c., Repetitive Accuracy within 3%

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.

Please see SERIES AT11910 for ATEX approved.

Product Applications

  • Air conditioning refrigeration coil icing detection; defrost cycle intiation.
  • Clogged filter detection.
  • Variable air volume controller.

Models & Ordering

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Model Number Description Usually Ships Price Order
1910-0 Differential pressure switch, range 0.15-0.55" w.c., approx. deadband @ min. set point 0.10, approx. deadband @ max. set point 0.10. Same Day $44.25 Order
1910-00 Differential pressure switch, range 0.07-0.15" w.c., approx. deadband @ min. set point 0.04, approx. deadband @ max. set point 0.04. Same Day $47.00 Order
1910-1 Differential pressure switch, range 0.40-1.6" w.c., approx. deadband @ min. set point 0.15, approx. deadband @ max. set point 0.16. Same Day $44.25 Order
1910-10 Differential pressure switch, range 3.0-11.75" w.c., approx. deadband @ min. set point 0.40, approx. deadband @ max. set point 0.40. Same Day $44.25 Order
1910-20 Differential pressure switch, range 4.0-20.0" w.c., approx. deadband @ min. set point 0.40, approx. deadband @ max. set point 0.50. Same Day $44.25 Order
1910-5 Differential pressure switch, range 1.40-5.5" w.c., approx. deadband @ min. set point 0.30, approx. deadband @ max. set point 0.30. Same Day $44.25 Order

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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, CSA, FM, UL. Optional EXPL Explosion-proof enclosure does not possess any agency approvals.

Options

  • 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.
  • 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

Model Number Description Usually Ships Price Order
A-302F-A 303SS static pressure tip with mounting flange, 4" hook style. For 3/16" ID rubber or plastic tubing, includes mounting screws. Same Day $9.10 Order
A-329 1/8" NPT close coupled street ell, brass. Same Day $5.90 Order
A-399 Duct pressure monitor kit, for use with standard or manual reset model switches. Less than 1 Week $36.75 Order
A-489 4" 303 SS straight static pressure tip with flange. Same Day $6.67 Order

Videos

Model Chart

EXAMPLE 1910 00 AT Series 1910-00-AT Compact Low Differential Pressure Switch with Conduit, range 0.07-0.15" w.c., with aluminum tag.
SERIES 1900
1910
1911
1920
1921
    Compact Low Differential Pressure Switch
Compact Low Differential Pressure Switch with Conduit
Compact Low Differential Pressure Switch without Conduit
Compact Low Differential Pressure Switch with Conduit and HP Back Port
Compact Low Differential Pressure Switch without Conduit, with HP Back Port
RANGE   00
0
1
5
10
20
  0.07-0.15" w.c.
0.15-0.55" w.c.
0.4-1.6" w.c.
1.4-5.5" w.c.
3.0-11.0" w.c.
4.0-20.0" w.c.
OPTIONS     AT
B
BGAP
DPK
EXPL
G
LC
MIL
MR
P
PRESET
ST
TC
V
VIT
WP
Aluminum Tag
Buna-N Diaphragm & O-rings
B-Gap Micro Switch
Duct Pressure Kit
Cast Iron Explosion-proof Housing
Gold Contact Switch
Less Conduit
MIL Switch
Manual Reset
L-Bracket Mounting
Preset
Stainless Steel Tag
Tropicalization Coating
Vent Option
Fluoroelastomer Diaphragm & O-rings
Weatherproof Housing

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