Gems Sensors & Controls LS-77700 Specifications

15/16"

(23.8 mm)

L

1

1-3/4"

(44.5 mm)

BUNA N

FLOAT

1/8

" NPT

1/2" HEX.
(12.7 mm)

1" DIA.

(25.4 mm)

3-1/4"

(82.6 mm)

15/16"

(23.8 mm)

L

1

1-3/4"

(44.5 mm)

BUNA N

FLOAT

1/8

" NPT

1/2" HEX.
(12.7 mm)

1" DIA.

(25.4 mm)

3-1/4"

(82.6 mm)

RED

RED

N.O. DRY
(N.C. DRY AVAILABLE)

LS-77700 Series – Bent Stem Switches Provide Greatest
Buoyancy Of Any Side Mount Version

These units perform in liquids with specific gravities as low as .45;
switches protrude into tank less than 3 inches.

Dimensions

Type I – 1/8˝ NPT Type II – 3/8-24˝ Thread

L1 Dimension (based on liquid specific gravity of 1.0):
Buna N Float: 2-3/8˝ (60.3 mm) ± 3/16˝
Stainless Steel Float: 2˝ (50.8 mm) ± 3/16˝

FLOAT TYPE

Type ll
version
shown.

Typical Wiring Diagram

LEVEL SWITCHES – SINGLE POINT

When mounted “stem up,” units are N.C. dry.

Typical Installation

Type I Type II

Common Specifications

Electrical Termination: No. 22 AWG, 24˝ L., Teflon® Lead Wires
Approvals: U.L. Recognized – File No. E45168
Switch* SPST: 20 VA, 120-240 VAC. Switch is N.O. (Dry), but available

N.C. (Dry).

Mounting Attitude: Vertical ± 30°.
Other Wetted Materials: Float Stop is Berylium Copper or PH-15-7-MO

Stainless Steel.
Grooved Stem Option: Stem may be grooved to prevent accidental or

vibrational movement of float stops (grip rings).

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

Materials

Type Stem and Mounting Float

Brass 316 Stainless Steel

I

Stainless Steel

II

Stainless Steel

*See “Electrical Data” on Page X-5 for more information.

– Stock Items.

316 Stainless Steel

Brass

Buna N .45

Brass 316 Stainless Steel

316 Stainless Steel

Brass

Buna N .45

Min. Liquid

Sp. Gr.

.70

.70

-40°F to +300°F (-40°C to +149°C)

Oil: -40°F to +300°F (-40°C to +149°C)

-40°F to +300°F (-40°C to +149°C)

Oil: -40°F to +300°F (-40°C to +149°C)

Shown with Buna N float.
Threads into NPT boss.

Operating Temperature

Water: to 180°F (82°C)

Water: to 180°F (82.2°C)

Pressure,
PSI, Max.

100

300

100

300

Shown with stainless
steel float. Mounts
directly through tank wall.

Part

Number

117711

117712

118125

118126

117715

117716

118127

118128

Visit www.GemsSensors.com for most current information.

A-11