Dwyer Instruments SERIES 1800 Data Sheet

SERIES 1800 | LOW DIFFERENTIAL PRESSURE SWITCH

FEATURES/BENEFITS

• Compact size and repeatability provide a high-value switch useful in many industrial applications

• Designed for panel and wall mounting to easily meet mounting requirements in most industrial settings

• Pressure ranges from 0.07 in w.c. to 85 in w.c. make this switch suitable for a wide range of applications

• Process applications

• Mechanical equipment control

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

Electrical Connection 3 screw type, common, normally open and normally closed.

Process Connection 1/8˝ female NPT.

Mounting Connection Diaphragm in vertical position. Consult factory for other position orientations.

Set Point Adjustment Screw type inside mounting spud.

Weight 1lb 5 oz (595 g).

Agency Approvals CE, CSA, FM, UL. Optional –EXPL explosion-proof enclosure does not possess any agency approvals.

DESCRIPTIONAPPLICATIONS

Essential for industrial environments, the Series 1800 Low Differential Pressure Switch for General Industrial Service combines small

size and low price with 2% repeatability for all but the most demanding applications. Set point adjustment inside the mounting stud permits mounting the switch on one side of a wall or panel with adjustment easily accessible on the opposite side. UL and CSA listed, and FM approved.

operation at high cycle rates.

DIMENSIONS

1-1/8

Ø7/8 [22.23]

CONDUIT

CONNECTION

3-39/64

[91.68]

3-1/8

[79.38]

Ø4

[101.60]

CLEARANCE FOR COVER REMOVAL

HOW TO ORDER

Use the bold characters from the chart below to construct a product code.

1820 -00 -WP

SERIES

1820: Pressure switch 1823: Pressure switch with conduit 1824: Pressure switch without conduit

RANGE

-00: 0.07-0.22 in w.c.

-0: 0.15-0.5 in w.c.

-1: 0.3-1.0 in w.c.

-2: 0.5-2.0 in w.c.

-5: 1.5-5.0 in w.c.

-10: 2.0-10.0 in w.c.

-20: 3.0-22.0 in w.c.

-40: 5.0-44.0 in w.c.

-80: 9.0-85.0 in w.c.

3/4

[19.05]

2-1/8

[53.98]

1-27/32

[46.83]

2-3/32

[53.18]

3-27/32

[97.63]

[28.57]

1/8 FEMALE NPT HIGH PRESSURE CONNECTION

1/2 MALE NPT MOUNTING SPUD

1/8 FEMALE NPT LOW PRESSURE CONNECTION

OPTIONS

-AT: Aluminum tag

-B: Buna-N elastomers

-BGAP: B-gap micro switch

-EXPL: Cast iron explosion-proof housing

-GOLD: Gold contact switch

-LC: Less conduit (1820 only)

-MIL: MIL switch

-MR: Manual reset

-PRESET: Preset

-SF: Silicone free (includes Buna-N elastomers)

-ST: Stainless steel tag

-WP: Weatherproof housing

ACCESSORIES

Model Description A-389 A-489 A-491 A-493 A-302F-A A-302F-B A-302F-C

Mounting bracket; 16 ga. steel, zinc plated and dichromate dipped for corrosion resistance

4˝ straight static pressure tip with ange 6˝ straight static pressure tip with ange 8˝ straight static pressure tip with ange 303 SS static pressure tip with mounting ange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting screws 303 SS static pressure tip with mounting ange; for 3/16˝ ID rubber or plastic tubing; 6˝ insertion depth; includes mounting screws 303 SS static pressure tip with mounting ange; for 3/16˝ ID rubber or plastic tubing; 8˝ insertion depth; includes mounting screws

DWYER INSTRUMENTS, INC.

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the

latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.