Gems Sensors & Controls LS-1750, LS-1755 Specifications

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1" DIA.
(25.4 mm)
1"
(25.4 mm)
2-1/16"
(52.4 mm)
L1†
1/2" HEX
(12.7 mm)
1/8" NPT
1-1/2
"
(38.1 mm)
1" DIA.
(25.4 mm)
3/4"
(19.1 mm)
2-1/16"
(52.4mm)
L1†
FLAT
WASHER
SPRING
1/2" HEX
(12.7 mm)
1/8" NPT
1-1/2"
(38.1mm)
1-1/2" DIA.
(38.1 mm)
1"
(25.4 mm)
2-1/16"
(52.4 mm)
L1†
1-1/2
"
(38.1mm)
1/2" HEX
(12.7 mm)
1/8" NPT
1-1/32" DIA.
(26.2 mm)
1-7/32"
(31.0 mm)
2-21/64"
(59.1mm)
L1†
1-45/64"
(42.8mm)
1/2" HEX
(12.7 mm)
1/8" NPT
®
Small Size – Alloys
Rugged Durability, With Broad Heat and Pressure Capabilities, are Hallmarks of These Compact Switches
Ideal for shallow tanks or restricted spaces, or for low-cost, high volume use.
LEVEL SWITCHES – SINGLE POINT
LS-1700 Series – Buna N Float
Offer broad chemical compatibility for general purpose use. Also ideal for oils and water.
Dimensions
LS-1700 Series – Teflon® Float
LS-1750 Series – All Stainless Steel
LS-1755 Series – All Stainless Steel
Rugged construction suitable for most corrosive liquids, and for high temperatures and pressures. Stainless steel is generally recognized as safe (GRAS) with FDA for food contact regulations.
† L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0).
Common Specifications
Electrical Termination: No. 22 AWG, 24˝ L., Polymeric Lead Wires, (except Part No. 79990 which has Teflon® Lead Wires).
Approvals: Series Nos. LS-1700, LS-1750 and LS-1755 are U.L. Recognized – File No. E45168 and CSA Listed – File No. 30200.
Switch Operation: Units are shipped N.O. unless otherwise specified. Selectable, N.O. or N.C., by inverting float on unit stem (except for LS-1700 Series switches with Teflon® Floats; see selection in “How to Order” table).
How To Order – Select Part Number based on specifications required.
Material
Series
Number
LS-1700
LS-1750 316 S.S. 316 S.S. 316 S.S. .70
LS-1755 316 S.S. 316 S.S. 316 S.S. .90 -40°F to +300°F (-40°C to +148.9°C) 275 20 VA
* See “Electrical Data” on Page X-5 for more information. ** Higher pressures are temperature dependent.
Stem and Mounting
Brass
316 S.S. 20 VA
316 S.S. Teflon
Buna N
®
Other
Wetted
Min. Liquid
Sp. Gr.
.45
316 S.S.,
Epoxy
.85 -40°F to +250°F (-40°C to +121.1°C) 1000
Operating Temperature
Water: to 180°F (82.2°C)
Oil: -40°F to +300°F (-40°C to +149°C)
-40°F to +300°F (-40°C to +148.9°C)
-40°F to +480°F (-40°C to +204.4°C)
Pressure,
PSI, Max.**
300
100
L1= 37/64˝ (14.5 mm) N.O.; 53/64˝ (20.8 mm) N.C.L1= 9/16˝ (14.2 mm) N.O.; 13/16˝ (20.6 mm) N.C. L1= 1/2˝ (12.7 mm) N.O. and N.C. L1= 5/8˝ (15.7 mm) N.O.; 3/4˝ (19.1 mm) N.C.
Switch*
SPST
20 VA
Part
Number
01701
01702
20 VA, N.O.
20 VA, N.C.
20 VA
20 VA
26791
27980
01750
79990
01755
A-10
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