Datasheet
A-4
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LEVEL SWITCHES – SINGLE POINT
Order By Part Number 142545 46999 76707
Materials
Stem and Mounting
All Polypropylene (Including Shield
4
) Polysulfone All Polysulfone (Including Collar)
Float
Polypropylene (Solid) Polysulfone Buna N
Other Wetted
— Brass, Aluminum, Polycarbonate, Viton A Epoxy
Min. Liquid Sp. Gr.
.90 .75 —
Operating Temperature
-40°F to +150°F (-40°C to +65.6°C) -40°F to +120°F (-40°C to +48.9°C) -40°F to +180°F (-40°C to +82.2°C)
Pressure, PSI, Max.
3
150 50
Switch
1
, SPST
20 VA, N.C./N.O. Dry
2
20 VA, N.C. Dry
Electrical Termination
No. 22 AWG, 22˝ L., PVC Lead Wires No. 22 AWG, 72˝ L., Polymeric Lead Wires No. 22 AWG, 72˝ L., PVC Lead Wires
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
3/8˝-24 NPSM THD.
1-13/16˝
(46.1 mm)
†
3-15/32˝
(88.1 mm)
1-1/4˝
(31.7 mm)
1/8˝ NPT
(3.2 mm)
1/2˝ HEX
(13 mm)
1.86˝ DIA.
(47.4 mm)
25/64˝
(10 mm)
2.09˝
(53.1 mm)
15/16˝
(23.8 mm)
1-15/32˝
(37.3 mm)
0.250˝
(6.4 mm)
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
3/8˝-24 NPSM THD.
1-13/16˝
(46.1 mm)
†
3-15/32˝
(88.1 mm)
1-1/4˝
(31.7 mm)
1/8˝ NPT
(3.2 mm)
1/2˝ HEX
(13 mm)
1.86˝ DIA.
(47.4 mm)
25/64˝
(10 mm)
2.09˝
(53.1 mm)
15/16˝
(23.8 mm)
1-15/32˝
(37.3 mm)
0.250˝
(6.4 mm)
1/8”-27 NPSM TH’D
STEM
FLOAT
ACTUATION
LEVEL
L1=3/4”
#22 AWG WIRE,
POLYMERIC
72”-78” EXT.
1 9/16”
DIA. REF.
1/4” NPT REF.
(2) PLACES
3 1/2” REF.
LS-3 Series / p3of3 / 26-APR-16
Unique Features Make These LS-3 Models Special
These small switches feature unique
configurations for special applications.
Part No. 142545
With Slosh Shield
Part No. 46999
Bottle Level
Part No. 76707
For Low Level
Compact, all-polypropylene
switch with slosh shield is
ideal for use with turbulent
liquids in small tanks. FDA
compliant materials.
For external mounting on
tanks too small to accom-
modate internally mounted
switches. (See note
below)
For detecting levels as low
as 5/8˝ from tank bottom.
Use in water, some oils and
chemicals.
Cut-away version shown
Notes:
1. See “Electrical Data” on Page X-5 for more information.
2. Switch operation is selectable, N.O. or N.C., by inverting the float on the unit stem.
3. Maximum pressure at 70°F (21°C).
4. Consult factory for other available materials.
† L
1
= Switch actuation level, nominal (based on a specific gravity of 1.0).
Note: LS-3 Series Bottle Level Switch is also available with any of the float materials shown on opposite
page. Contact GEMS for correct part number.
– Stock Items.
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