-
43 www.gemssensors.com
D-6
Small Size – Engineered Plastics
LS-3 Series – Offers High Reliability, Compact Size
and Low Costs in NPT, Straight and Metric Threads
Polypropylene Float
(Solid)
Buna N
Float
Polypropylene
Float (Hollow)
For water based liquids,
with limited use in oils
and chemicals.
With Polypropylene stem
and fl oat, switch offers
broad chemical
compatibility.
Ideal for oils and fuels. Features a low specifi c
gravity fl oat offering
broad chemical
compatibility.
Dimensions
Common Specifi cations
Electrical Termination: No. 22 AWG, 24˝ L., PVC Lead Wires. On BSP and Metric mounting: PVC Jacketed 2-Conductor No. 22AWG Cable.
PVDF unit: No.22 AWG, FEP Tefl on® Jacketed, 24˝ - 26˝.
Approvals: U.L. Recognized – File No. E45168; CSA Listed – File No. 30200. CE Declaration Available Upon Request.
Switch SPST: 20 VA, 120-240 VAC. Units are shipped N.O. unless otherwise specifi ed. Selectable, N.O. or N.C., by inverting fl oat on unit stem.
Ideal for shallow tanks or restricted spaces, or for any low-cost, high volume use.
LS-3 Series are available in FDA approved materials, consult GEMS for details.
† L1= Switch actuation level, nominal
(based on a liquid specifi c gravity of 1.0).
Polysulfone Float:
3/4˝ (19.0 mm)
Polypropylene Float (Hollow):
13/16˝ (20.6 mm)
Polypropylene Float (Solid):
9/16˝ (14.3 mm)
Buna N Float:
13/16˝ (20.6 mm)
PVDF Float:
1/2˝ (12.7 mm)
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9/16"
HEX
.315" REF.
(8.0mm)
.14"
(2.6mm)
1/2"
HEX
.390" REF.
(9.9mm)
.20"
(5.1mm)
5/8"
HEX
.475" REF.
(12mm)
How To Order – Select Part Number based on specifi cations required.
**Maximum Pressure at 70°F (30°C)
– Stock Items.
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Accessories Available in OEM Quantities:
Jam Nut, Gaskets, and Slosh Shields.
2-3/32"
(53.2 mm)
1-9/16"
(39.7 mm) 1"
(25.4 mm)
1/8" NPT
1/2" HEX
1" DIA
(25.4 mm)
L1✝
17/32"
(13.4 mm)
Polysulfone
Float
ALL-PVDF
Stem and fl oat of
corrosion-resistant
PVDF for ultra-pure
applications.
Wetted materials
of construction comply
with FDA food contact
regulations.
FDA NSF FDA
NSF
FLOAT TYPE
www.gemssensors.com D-7
Cut-away version shown
Compact, all-polypropylene
switch with slosh shield is
ideal for use with turbulent
liquids in small tanks. FDA
approved materials.
Unique Features Make These LS-3 Models Special
These small switches feature unique
confi gurations for special applications.
Part No. 46999
Bottle Level
Part No. 76707
For Low Level
Part No. 142545
With Slosh Shield
For external mounting
on tanks too small to
accommodate internally
mounted switches.
(See note below)
For detecting levels as
low as 5/8˝ from tank
bottom. Use in water,
gasoline, some oils and
chemicals.
* See “Electrical Data” on Page D-4 for more information.
** Switch operation is selectable, N.O. or N.C., by inverting the fl oat on the unit stem.
*** Maximum pressure at 70°F (30°C).
† L
1= Switch actuation level, nominal (based on a specifi c gravity of 1.0).
†† Consult factory for other available materials.
Note: LS-3 Series Bottle Level Switch is also available with any of the fl oat materials shown on
opposite page. Contact GEMS for correct part number.
– Stock Items.
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9/16"
(14.3 mm) †
1-1/4" DIA.
(31.7 mm)
17/32"
(13.4 mm)
2-3/32"
(53.2 mm)
1/2" HEX
(12.7 mm)
1/8" NPT
1-9/16"
(39.7 mm)
1-9/16" DIA.
(39.6 mm)
1/4" NPT
1/4" NPT
1/8"-27 NPSM THD.
1-13/16"
( 46.1 mm) †
3-15/32"
(88.1 mm)
1-1/4"
( 31.7 mm)
17/32"
(13.4 mm)
15/16"
(23.7 mm)
REF.
2-3/32"
(53.1mm)
1/8" NPT
1/2" HEX
15/16"
(23.7 mm) †
1-7/8" DIA.
(47.6 mm)
COLLAR
1-9/16"
(39.7mm)
