A-6 Visit www.GemsSensors.com for most current information.
LEVEL SWITCHES – SINGLE POINT
Type 3
Internal Mounting
Type 5
External Mounting
Type 7
External Mounting
Type 10
External Mounting
Type 12
Internal Mounting
Type 13
Internal Mounting
Polypropylene, Nylon or Versaplast™. Polypropylene, Nylon or Versaplast™. Polypropylene or Nylon;
conduit connection.
Externally mounts through and seals non-threaded
holes using a HNBR compression gasket.
Side mount “Drop Down” design for calcifying hot
water applications. NSF compliant Noryl®.
Polypropylene or Nylon.
Note: Recommended hole size =
7/8˝ dia. x 1/32˝ - 5/32˝ thick panel.
Media Compatibility
Media LS-7
Compatible Types
Oil, Fuel, Hydrocarbons Nylon
Broad Range of
Chemicals and Water Polypropylene
Limited Chemicals and Water Noryl®
Oil, Antifreeze, High
Temperatures, Corrosive Fluids,
Various Chemicals
Versaplast™
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ZIP CORD
LEADWIRES,
24˝
EXTENDED
5/8˝ -11
THREAD
2-3/4˝
(69.8 mm)
LOCKING NUT
(NYLON)
3.84˝
(97.5 mm)
GASKET
(WHITE BUNA N
INCLUDED)
ZIP CORD STYLE
24˝ LEADWIRES
5/8˝ HEX
1/2˝ NPT
2-7/8˝
(73 mm)
5/8˝
(16 mm)
4-1/4˝
(108 mm)
N.O.
N.C.
LEAD
WIRES,
24˝
EXTENDED
1/2˝ NPT
5/8˝ (16 mm)
WRENCH FLAT
19/64˝
(7.5 mm)
2-7/8˝
(73 mm)
4-1/2˝
(114 mm)
N.C. ACTUATION RANGE
25˝ to .50˝
MAGNET
45/64˝ REF.
WATER
FLOAT PIVOTS STAY ABOVE WATER
LS-7 Series / p1of4 / 23-MAR-15
Small Size – Engineered Plastics
LS-7 Series–Compact Side Mounts
are the Solution to Many Small Tanks
These low-cost units are ideal for high volume use in small tanks and vessels. Engi-
neered plastics construction offers broad compatibility in water, oils and chemicals.
Common Specifications
Switch Rating*: SPST, 20VA
Lead Wire Gauge: No. 22 AWG
Mounting Attitude: Horizontal.
RoHS: In compliance with EU-direc-
tive 2011/65/EC requirements for
chemicals and substances.
* See “Electrical Data” on Page X-5 for
more information.
Approvals
Material CE
UL
Recognized
File No.
E45168
cUL
Recognized
CSA Listed-
File No.
30200
NSF
Listed
Mat.
Std. 169
Nylon X X X X
Polypropylene X X X X X
Noryl®X X X X
Versaplast™ X X X
Food
Warmer
Switch Operation
Depending on the mounting position, the float on these switches can rise or lower with the liquid level.
By rotating the switch 180°, the switch operation can be Normally Open or Normally Closed (except Type
12).
Normally Open
FLOAT ARC
ENVELOPE
Normally
Closed
When the switch is mounted so
that the float lowers with the
liquid level, the switch is N.O.
When the switch is mounted
so that the float rises with the
liquid level, the switch is N.C.
Types 3, 5, 7, 10 and 13 Type 12 – N.C. “Drop Float” Design
The LS-7 Type 12 is ideal for use on food warmers, hot
water heaters, steam cookers, small boilers or wherever
water evaporation occurs. The switch is used effectively
for either high fluid level alarms or water make up
systems. The units are made of Noryl®, which carries NSF
approval for use in potable water, and are supplied with
FDA-approved Buna gaskets.
A-7
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LEVEL SWITCHES – SINGLE POINT
Type 3
Internal Mounting
Type 5
External Mounting
Type 7
External Mounting
Type 10
External Mounting
Type 12
Internal Mounting
Type 13
Internal Mounting
Polypropylene, Nylon or Versaplast™. Polypropylene, Nylon or Versaplast™. Polypropylene or Nylon;
conduit connection.
Externally mounts through and seals non-threaded
holes using a HNBR compression gasket.
Side mount “Drop Down” design for calcifying hot
water applications. NSF compliant Noryl®.
Polypropylene or Nylon.
Note: Recommended hole size =
7/8˝ dia. x 1/32˝ - 5/32˝ thick panel.
Mounting
Type
Materials* Min.
Liquid
Sp. Gr.
Operating Temperature Operating
Pressure, Max.
Float
Arc
Envelope
Part
Number
Stem and
Mounting Float Lead Wire
Jacket
3
Nylon
TPE†
.65 -40°F to +250°F (-40°C to +121.1°C)
100 psi @ 70°F
(6.8 bar @ 20°C) 2.20
165570
Polypropylene .55 -40°F to +225°F (-40°C to +107.2°C) 164520
Versaplast™ .80 -40°F to +250°F (-40°C to +121.1°C) 182600
5
Polypropylene TPE†.55 -40°F to +225°F (-40°C to +107.2°C)
100 psi @ 70°F
(6.8 bar @ 20°C) 1.25
131100
Nylon .65 -40°F to +250°F (-40°C to +121.1°C) 140620
Versaplast™ Teflon®.80 -40°F to +300°F (-40°C to +148.9°C) 177100
5 - BSP Versaplast™ TPE†.80 -40°F to +250°F (-40°C to +121.1°C) 100 psi @ 70°F
(6.8 bar @ 20°C) 1.25 189422
7Polypropylene TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 100 psi @ 70°F
(6.8 bar @ 20°C) 1.50 160450
Nylon .65 -40°F to +250°F (-40°C to +121.1°C) 160460
10 Polypropylene TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 50 psi @ 70°F
(3.4 bar @ 20°C) 2.08 165800
Nylon .65 -40°F to +250°F (-40°C to +121.1°C) 165900
12 Noryl®TPE†.80 -40°F to +225°F (-40°C to +107.2°C) 100 psi @ 70°F
(6.8 bar @ 20°C) .70 191080
13 Polypropylene TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 100 psi @ 70°F
(6.8 bar @ 20°C) 2.20 197050
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N.O.
N.C.
GASKET, HNBR (FDA Compliant)
NUT, 5/8˝-11
.85˝ DIA.
(21.6 mm)
.90˝
(23 mm)
.10˝
(2.5 mm)
1.48˝
(37.6 mm)
3.85˝
(97.8 mm)
4.093˝
(104 mm)
.33˝
(8.4 mm)
11/16˝ DIA.
(18 mm)
1-5/64˝
(27 mm)
BUNA
GASKET
3-59/64˝ REF.
(100 mm)
2-23/32˝ REF.
(69 mm)
5/8˝-11
THREAD
ZIP CORD
LEAD WIRES
24˝ - 26˝
EXTENDED
LOCKING
NUT
3-51/64˝
(94 mm)
ZIP CORD
LEADWIRES
24˝
EXTENDED
1/2˝ WRENCH FLATS
9/16˝-24 THD.
JAM NUT (NYLON)
GASKET (BUNA 'N')
2-43/64˝
(69 mm)
1-1/8˝
(29 mm)
N.O. N.C.
LS-7 Series / p2of4 / 23-MAR-15
Nylon is ideal for oils and fuels.
NSF Standard 169 polypropylene is ideal for potable water and broad chemicals.
Versaplast™ is ideal for corrosive fluids, hot water, antifreeze, chemicals and oils.
How To Order – Select Part Number based on specifications required.
* Polysulfone and Ryton® R-4 are available upon request.
† Thermoplastic Elastomer Zip Cord, 22 AWG.
Note: NSF 169 Versions available. Contact factory.
– Stock Items.
See alloy versions on next page.
FLOAT TYPE
A-8 Visit www.GemsSensors.com for most current information.
LEVEL SWITCHES – SINGLE POINT
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LEAD WIRES,
24˝ EXTENDED 1.40˝
(36 mm) REF.
3.38˝
(86 mm) REF.
11/16˝
(17 mm) REF.
7/8˝ (22 mm)
-14UNF THD
7/8˝ (22 mm)
-14 JAM NUT #22 AWG ZIP CORD
LEAD WIRES
24˝ EXTENDED
5/16˝ REF.
(8 mm)
1.00˝
HEX
1/2˝ NPT
3-29/32˝ REF.
(99.2 mm)
1-1/32˝ REF.
(26.2 mm)
LEAD
WIRES,
24˝
EXTENDED
1/2˝ NPT
5/8˝ WRENCH
FLAT
5-5/16˝ REF.
(135 mm)
1-5/8˝ REF.
(41.3 mm) 5/8˝ DIA. REF.
(15.9 mm) LEAD WIRES,
24˝ EXTENDED
.83 REF.
(21 mm)
4-9/16˝ REF.
(116 mm)
5/8˝ (16 mm)
DIA. REF.
5/8˝ (16 mm)
-11 JAM NUT
WITH VITON GASKET
5/8˝ (16 mm)
-11 THD
LS-7 Series / p3of4 / 23-MAR-15
Small Size - Alloys
LS-7 Series - Compact Alloy and Alloy/Plastics Side Mounts
Built for durability, our LS-7 Series switches utilize stainless steel, or zinc
bodies. Ideal for any small tank or vessel destined for a
rugged environment.
All-stainless steel material of construction of Types 9 and 11 is generally recognized
as safe with FDA for food contact regulations.
Type 6 – External Mounting Type 8 – External Mounting
Zinc alloy body with polypropylene or nylon float. SAE
Mounting.
Zinc alloy body with nylon or
polypropylene float.
Type 9 – External Mounting
316 Stainless Steel body with 316 SS, nylon
or polypropylene float.
Type 11 – Internal Mounting
316 Stainless Steel body with
316 SS float.
Dimensions
Type 6 Type 8
Common Specifications
Switch Rating*: SPST, 20VA
Lead Wire Gauge: No. 22 AWG
Mounting Attitude: Horizontal.
RoHS: In compliance with EU-directive
2011/65/EC requirements for chemicals and
substances.
*See “Electrical Data” on Page X-5 for more information.
Type 9 Type 11
A-9
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LEVEL SWITCHES – SINGLE POINT
Mounting
Type
Materials Min.
Liquid
Sp. Gr.
Operating Temperature Operating
Pressure, Max.
Float Arc
Envelope
Part
Number
Stem and
Mounting Float Lead Wire
Jacket
6Zinc
Alloy*
Nylon TFE†.65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.36 155660
Polypropylene .75 -40°F to +225°F (-40°C to +107°C) 150 psi @ 70°F 1.36 179870
8Zinc
Alloy*
Nylon TFE†.65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.40 160950
Polypropylene .55 -40°F to +225°F (-40°C to +107°C) 150 psi @ 70°F 1.40 162795
9
316
Stainless
Steel
316 S.S.
TFE†
.80 -40°F to +250°F (-40°C to +121°C) 300 psi @ 70°F 1.43 164870
Nylon .65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.40 164850
Polypropylene .55 -40°F to +225°F (-40°C to +107°C) 100 psi @ 70°F 1.40 164860
11 316 Stainless Steel Teflon®.80 -40°F to +250°F (-40°C to +121°C) 300 psi @ 70°F 1.65 179445
LS-7 Series / p4of4 / 23-MAR-15
Switch Operation
Depending on the mounting position, the float on these switches can either rise or lower with
the liquid level. By rotating the switch 180°, the switch operation can be Normally Open or
Normally Closed.
Normally Open
FLOAT ARC
ENVELOPE
Normally
Closed
When the switch is mounted so
that the float rises with the liquid
level, the switch is N.C.
When the switch is mounted so
that the float lowers with the liquid
level, the switch is N.O.
How To Order – Select Part Number based on specifications required.
†Thermoplastic Elastomer Zip Cord.
– Stock Items.
*Zinc Alloy Material Note:
When mounted in certain cathodic metals, including stainless steel, and used in water-
based liquids, galvanic corrosion may occur. Consult factory for information.
FLOAT TYPE
