Gems Sensors & Controls LS-1800 Specifications

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taolFNanuB taolFn

®

olfeT taolFNanuB

1-1/4" DIA.

(31.7 mm)

2-15/16"

(74.6 mm)

1/2" HEX

(12.7 mm)

1/8" NPT

17/32"

(13.5 mm)

7/8"

(22.2 mm)†

1-3/4"

(44.5 mm)

2-13/32

"

(61.1 mm)

1-1/4" DIA.
(31.75 mm)

2-15/16"

(74.6 mm)

1/2" HEX

(12.7 mm)

1/8" NPT

17/32"

(13.5 mm)

7/8"

(22.2 mm)†

1-3/4"

(44.5 mm)

2-13/32

"

(61.1 mm)

FLAT

WASHER

SPRING

1-7/8" DIA.

(47.6 mm)

3-3/16"

(80.9 mm)

5/8" HEX

(15.9 mm)

1/4" NPT

21/32"

(16.7 mm)

1-3/16"

(30.2 mm)†

1-13/16"

(46.1 mm)

2-17/32"

(64.3 mm)

FLOAT TYPE

Large Size – Alloys

LS-1800 and LS-1900 Series are a Step Above Our Plastic Units for Pressure Capabilities

Excellent stability for general use in oils and water.

LS-1800 Series –
Buna N Float

LS-1800 Series –
Teflon® Float

Intermediate in size, LS-1800 switches provide long life
and dependability to meet a broad range of requirements.

Dimensions

LS-1900 Series –
Buna N Float

With large float displacement, switch
withstands rough service; is suitable
for high viscosity liquids.

LEVEL SWITCHES – SINGLE POINT

†L1 = Switch actuation level, nominal (based on a liquid specific gravity of 1.0).

Common Specifications

Electrical Termination: No.18 AWG, 24˝ L., Polymeric Lead Wires.
Approvals: All Switches on this page are U.L. Recognized – File No. E45168, and are CSA

Listed – File No. 30200.
Switch Operation: Selectable, N.O. or N.C., by inverting float on unit stem (except for

LS-1800 Series switch with Teflon® float). Units are shipped N.O. unless otherwise specified.

How To Order – Select Part Number based on specifications required.

Material

Series

Number

LS-1800

LS-1900

*See “Electrical Data” on Page X-5 for more information.
**LS-1800 100 VA switches are not U.L. Recognized.

Stem and
Mounting

Brass Buna N

316 Stainless

Steel

Float

Buna N .75

®

Teflon

Other

Wetted

316 Stainless

Steel, Hysol

Brass

316 Stainless

316 Stainless

Steel

Buna N

Steel, Hysol

Min. Liquid

Sp. Gr.

.75

Oil: -40°F to +230°F (-40°C to +110°C)

.65

.55

.55

*** LS-1900 100VA unit is UL Resistive Rated.

-40°F to +250°F (-40°C to +121°C)

Oil: -40°F to +230°F (-40°C to +110°C)

Operating Temperature

Water: to 180°F (82°C)

Water: to 180°F (82°C)

Pressure,

Switch*

PSI, Max.

150

100 VA**

100 VA**

300 20 VA, N.O.

150

100 VA***

100 VA

SPST

20 VA

20 VA

20 VA

20 VA

Part

Number

01801

35651

01807

35657

01811

01901

35676

01907

35682

Visit www.GemsSensors.com for most current information.

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