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Series Specials Level Switch LS-3 Gem Sensors

Gem Sensors Series Specials Level Switch

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The durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration are minimized, these hermetically sealed switches provide precis
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Gem Sensors Series Specials Level Switch

 Unique Features Make these LS-3 Models Special

Quick Specs... 

  • P/N 142545 - with Slosh Shield: Compact, all-polypropylene switch with slosh shield is ideal for use with turbulent liquids in small tanks. FDA approved materials. 
  • P/N 46999 - Bottle Level: For external mounting on tanks too small to accommodate internally mounted switches. (See note below) 
  • P/N 76707 - For Low Level: For detecting levels as low as 5/8" from tank bottom. Use in water, gasoline, some oils and chemicals

Overview / Design Principle: 

The durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration are minimized, these hermetically sealed switches provide precise repeatability with no more than 1% deviation. The switch actuation points remain constant over the life of the unit.  

Gems level switches operate on a direct, simple principle. In most models, a float encircling a stationary stem is equipped with powerful, permanent magnets. As the float rises or lowers with liquid level, the magnetic field generated from within the float actuates a hermetically sealed, magnetic reed switch mounted within the stem. The stem is made of non-magnetic metals or rugged, engineered plastics.

Dimensions:

 Part Number - 142545
 LS3Special1 
A  .1/8" NPT 
B  1/2" HEX (12.7 mm) 
C  1-1/4" Dia. (31.7 mm) 
D  9/16" (14.3 mm) * 
E  1-9/16" (39.7 mm) 
F  1-9/16" (39.7 mm) 
G  1-9/16" (39.7 mm) 

* L1 = Switch actuation level, nominal (based on a specific gravity of 1.0). 

 Part Number - 46999
 LS3Special2 
A  1-13/16" (46.1 mm) * 
B  1/4" NPT 
C  1-9/16" Dia. (39.6 mm) 
D  1/4" NPT 
E  3-15/32" (88.1 mm) 
F  1-1/4" (31.7 mm) 
G  1/8"-27 NPSM THD 

* L1 = Switch actuation level, nominal (based on a specific gravity of 1.0). 

 Part Number - 76707
 LS3Special3 
A  .1/8" NPT 
B  1/2" HEX 
C  Collar 
D  15/16" (23.7 mm) Ref. 
E   1-7/8" Dia. (47.6 mm) 
F   15/16" (23.7 mm) * 
G   1-9/16" (39.7 mm) 
H   2-3/32" (53.1 mm) 
I   17/32" (13.4 mm) 

* L1 = Switch actuation level, nominal (based on a specific gravity of 1.0). 

Specifications: 

Part Number 

142545 

46999  

76707  

Materials Stem & Mounting 

All Polypropylene (including Shield) 

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 +65.6°C)  

-40°F to 120°F (-40°C +48.9°C)  

-40°F to 180°F (-40°C +82.2°C)  

 Pressure, Max 

150 PSI (10.3 bar) 

50 PSI (3.4 bar) 

50 PSI (3.4 bar) 

Switch, SPST 

20 VA, N.C./N.O. Dry 

20 VA, N.C. Dry 

  20 VA, N.C. Dry 

Electrical Termination 

No. 22 AWG, 22" L., PVC Lead Wire 

No. 22 AWG, 72" L., Polymeric Lead Wires 

No. 22 AWG, 72" L., PVC Lead Wires 



 IMPORTANT REED SWITCH PROTECTION INFORMATION: Read before installing.

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LS-3 Series-Specials
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