Level Sensors & Switches

LS-52100 Single-Point Level Switch

Part Number: 116971
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LS-52100 Series Single-Point Level Switch solve the problem of point level sensing in tanks with inaccessible tops or bottoms, or at intermediate locations in larger tanks. Installation is through the tank side at the detection point. Rugged, all stainless-steel unit offers broad chemical compatibility at temperatures to 300°F (149°C). Explosion-proof models are available.

  • Large Size
  • All Stainless Stee
  • Temperatures


  • Large Size
  • All Stainless Steel
  • High Temperatures
Sensor Type
Float Type
Primary Material Of Construction
Wetted Materials
316 Stainless Steel, 304 Stainless Steel, 430 Stainless Steel, Teflon, Ceramic
Stem Material
Stainless Steel
Float Material
304 Stainless Steel
Actuation Level
Min. Liquid SG
Maximum Pressure
500 psi
Minimum Temperature
Maximum Temperature
Mounting Size
1" NPT Male
Mounting Style
Electrical Termination
24" Long, 18 AWG, Polymeric Leads
Switch Type
SPST (100 VA)
Switch Operation
Normally Open (Non-Reversible)

Reed Switch Protection

Format .pdf
Size 56 KB

Gems Sensors Instructions, LS-2050 and LS-52100

Format .pdf
Size 293 KB

Gems Sensors Catalog, Alloy Side Mount Level Switches

Format .pdf
Size 672 KB
  • Alt Energy Equipment
  • General Industry
  • General Industry - Environmental
  • General Industry - Hydraulics
  • General Industry - Machine Tool
  • General Industry - Other
  • General Industry - Tanks
  • Marine - Commercial - Aftermarket
  • Marine - Commercial - Container Ships
  • Marine - Commercial - Cruise Ships
  • Marine - Commercial - Other
  • Marine - Commercial - Pleasure Craft
  • Marine - Commercial - Repair Yard
  • Marine - Commercial - Ship Owner
  • Marine - Commercial - Ship Systems
  • Marine - Commercial - Shipbuilder
  • Marine - Commercial - Workboats
  • Marine - Commercial - Yachts
  • Marine Vessels
  • Oil & Gas - Extraction & Distribution Equip.
  • Oil & Gas - Other
  • Oil & Gas Equipment
  • Power Gen Equipment
  • Power Generation - Green Energy
  • Power Generation - Other
  • Power Generation - Power Generating Facilities
  • Process Applications
  • Process Industry - Other
  • Process Industry - Process Tanks
  • Process Tanks
  • Storage Tanks
  • Waster Water Applications
  • Water & Waste Water - Other
Is there a minimum current flow requirement for a standard 20VA reed switch?

Yes, very low currents (< 5ma) can prevent “cleaning” of the contacts or not have enough energy to maintain low contact resistance. 5ma is likely a good minimum for our standard 20 VA switch. But you also want enough voltage. Approximately, 5V, 5ma is a good minimum. For low current switching we recommend a 10 VA reed switch which can better handle lower loads. (1ma for example).

What is the life expectancy of a reed switch?

A reed switch is extremely rugged and designed to operate reliably for many years, under ideal conditions, up to about 2 million cycles. To achieve maximum service life, reed switches benefit from protected electrical supply.