Dwyer Series 1800 Low Differential Pressure Switch

Dwyer Series 1800 Low Differential Pressure Switch for General Industrial Service

Set Points from 0.07″ to 85″ w.c. Repetitive Accuracy within 2%

Essential for industrial environments, the Dwyer Series 1800 Low Differential Pressure Switch combines small size and low price with 2% repeatability for enough accuracy for all but the most demanding applications. Set point adjustment inside the mounting stud permits mounting switch on one side of a wall or panel with adjustment easily accessible on the opposite side. UL 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). 1823-00, -20 to 180°F (-28.9 to 82.2°C).
• Pressure Limits:10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge.
• Switch Type:Single-pole double-throw (SPDT).Repeatability:±2%.
• Electrical Rating:15 A @ 120-480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate 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 mounting spud.
• Weight:1 lb, 5 oz (595 g).
• Agency Approvals:CE, CSA, FM, UL. NOTE: 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. 5-1/2 lbs. (2.5 kg). Switch must be factory installed. Change 1823 base number to 1824 and add -WP suffix. Example: 1824-1-WP.
• Explosion-proof Housing – Cast iron base with aluminum cover. Rated Class I, Group D; Class II, Div. 1 & 2, Groups E,F,G; Class III and NEMA 7 C,D, NEMA 9 E,F,G. Wt. 7-1/2 lbs. (3.4 kg). Switch must be factory installed. Change base number to 1824 and add -EXPL suffix. Example: 1824-1-EXPL.
• MIL Environmental Construction – Unlisted Model 1820 can be furnished with a special sealed snap switch for protection against high humidity, fungus and/or military applications. Similar to Model 1823 except dead band is slightly greater and some lower set points may not be possible. To order, add suffix -MIL. Example: 1820-2-MIL.

ACCESSORIES