Level Sensors & Switches

LS-1750 Single-Point Level Switch

Part Number: 79990
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LS-1750 Series Single-Point Level Switches are ideal for shallow tanks or restricted spaces, or for low-cost, high volume use. Rugged construction suitable for most corrosive liquids, and for high temperatures and pressures. All-stainless steel material of construction complies with FDA food contact regulations.

  • All Stainless Steel
  • FDA Compliant for Contact with Food
  • High Temperatures and Pressures


  • All Stainless Steel
  • FDA Compliant for Contact with Food
  • High Temperatures and Pressures
Sensor Type
Float Type
Primary Material Of Construction
Wetted Materials
316 Stainless Steel
Stem Material
Stainless Steel
Float Material
316 Stainless Steel
Float Diameter
1 1/2"
Actuation Level
Min. Liquid SG
Maximum Pressure
100 psi
Minimum Temperature
Maximum Temperature
Mounting Size
1/8" NPT Male
Mounting Style
Electrical Termination
24" Long, 22 AWG, Polymeric Leads
Switch Type
SPST (20 VA)
Switch Operation
Normally Open (Reversible)

Reed Switch Protection

Format .pdf
Size 56 KB

Gems Sensors Instructions, Level Switches

Format .pdf
Size 553 KB

Gems Sensors Catalog, Small Alloy Float Level Switches

Format .pdf
Size 2 MB
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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.