LS-1700 Series Single-Point Level Switch0 pages
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
LS-1700 Series –
Teflon® Float
LS-1750 Series –
All Stainless Steel
Offer broad chemical compatibility for general purpose
use. Also ideal for oils and water.
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.
Dimensions
LS-1700 Series
LS-1750 Series
Teflon® Float
Buna N Float
1/2" HEX
(12.7 mm)
L1†
1-1/2"
(38.1 mm)
3/4"
(19.1 mm)
1"
(25.4 mm)
1-1/2"
(38.1mm)
1" DIA.
(25.4 mm)
1/2" HEX
(12.7 mm)
2-21/64"
(59.1mm)
2-1/16" L1†
(52.4 mm)
1-1/2"
(38.1mm)
FLAT
WASHER
L1= 9/16˝ (14.2 mm) N.O.; 13/16˝ (20.6 mm) N.C.
1/2" HEX
(12.7 mm)
SPRING
L1†
1" DIA.
(25.4 mm)
1/8" NPT
1/8" NPT
1/2" HEX
(12.7 mm)
2-1/16"
(52.4mm)
1"
(25.4 mm)
LS-1755 Series
Stainless Steel Float and Stem
1/8" NPT
1/8" NPT
2-1/16"
(52.4 mm)
LS-1755 Series –
All Stainless Steel
1-7/32"
(31.0 mm)
1-45/64"
(42.8mm)
1-1/32" DIA.
(26.2 mm)
1-1/2" DIA.
(38.1 mm)
L1= 1/2˝ (12.7 mm) N.O. and N.C.
L1†
L1= 5/8˝ (15.7 mm) N.O.; 3/4˝ (19.1 mm) N.C.
L1= 37/64˝ (14.5 mm) N.O.; 53/64˝ (20.8 mm) N.C.
†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
Stem and
Mounting
Brass
LS-1700
316 S.S.
Float
Buna N
Other
Wetted
316 S.S.,
Epoxy
Min. Liquid
Sp. Gr.
Operating Temperature
Pressure,
PSI, Max.**
.45
Water: to 180°F (82.2°C)
Oil: -40°F to +300°F (-40°C to +149°C)
300
.85
-40°F to +250°F (-40°C to +121.1°C)
1000
316 S.S.
Teflon®
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)
-40°F to +480°F (-40°C to +204.4°C)
-40°F to +300°F (-40°C to +148.9°C)
* See “Electrical Data” on Page X-5 for more information.
** Higher pressures are temperature dependent.
A-10
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100
275
Switch*
SPST
Part
Number
20 VA
01701
20 VA
01702
20 VA, N.O.
26791
20 VA, N.C.
27980
20 VA
01750
20 VA
79990
20 VA
01755
"