Gems LS-7 Series Single-Point Type 3 Level Switches are ideal for high volume use in small tanks and vessels. Polypropylene, Nylon or Versplast options are available. Polypropylene is ideal for potable water and broad chemicals, Nylon is ideal for oils and fuels and Versaplast is ideal for corrosive fluids.
Gems Sensors LS-7 Type 3 Series Single-Point Level Switch
| Gems LS-7 Series Compact Side Mount Level Switches Technical Specifications | |
|---|---|
| ● GENERAL | |
| Description | Low-cost, compact side-mount float level switches for high-volume use in small tanks and vessels. Available in engineered plastics (broad compatibility with water, oils and chemicals) or stainless steel / zinc alloy construction (for rugged environments). |
| Operating Principle | Depending on mounting position, the float rises or lowers with liquid level. Rotating the switch 180° changes operation between Normally Open and Normally Closed (except Type 12, which is a fixed N.C. “drop float” design). |
| ● PRODUCT TYPES — ENGINEERED PLASTICS | |
| Type 3 — Internal Mounting | Polypropylene, Nylon or Versaplast™. 5/8″-11 thread with nylon locking nut; Buna N gasket; zip cord leadwires, 24″ extended. |
| Type 5 — External Mounting | Polypropylene, Nylon or Versaplast™. 1/2″ NPT, 5/8″ hex; zip cord style, 24″ leadwires. |
| Type 7 — External Mounting | Polypropylene or Nylon; conduit connection. 1/2″ NPT, 5/8″ wrench flat; 24″ extended lead wires. |
| Type 10 — External Mounting | Externally mounts through and seals non-threaded holes using an HNBR (FDA-compliant) compression gasket, 5/8″-11 nut. Recommended hole size: 7/8″ dia. x 1/32″–5/32″ thick panel. |
| Type 12 — Internal Mounting | Side mount “Drop Down” design for calcifying hot water applications. NSF-compliant Noryl® construction with FDA-approved Buna gasket; ideal for food warmers, hot water heaters, steam cookers, small boilers, high fluid level alarms or water make-up systems. N.C. actuation range 0.25″ to 0.50″. |
| Type 13 — Internal Mounting | Polypropylene or Nylon. 9/16″-24 thread, nylon jam nut, Buna ‘N’ gasket, 1/2″ wrench flats; zip cord leadwires, 24″ extended. |
| ● PRODUCT TYPES — ALLOYS | |
| Type 6 — External Mounting | Zinc alloy body with polypropylene or nylon float. SAE mounting, 7/8″-14 UNF thread with jam nut. |
| Type 8 — External Mounting | Zinc alloy body with nylon or polypropylene float, or 316 Stainless Steel body with 316 SS, nylon or polypropylene float. 1/2″ NPT, 1″ hex. |
| Type 9 — External Mounting | 316 Stainless Steel body with 316 SS, nylon or polypropylene float. 1/2″ NPT, 5/8″ flats. |
| Type 11 — Internal Mounting | 316 Stainless Steel body. 5/8″-11 thread with jam nut and Viton® gasket. All-stainless steel construction of Types 9 and 11 is generally recognized as safe with FDA for food contact regulations. |
| ● ELECTRICAL / COMMON SPECIFICATIONS | |
| Switch Rating | SPST, 20 VA (both plastics and alloy series). |
| Lead Wire | No. 22 AWG. Plastics series: standard length. Alloy series: 24″–27″ extended. |
| Mounting Attitude | Horizontal. |
| RoHS Compliance | In compliance with EU-directive 2011/65/EC requirements for chemicals and substances. |
| ● APPROVALS BY MATERIAL (PLASTICS SERIES) | |||||
| 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 | — | — |
| ● MEDIA COMPATIBILITY (PLASTICS SERIES) | |
| Media | LS-7 Compatible Material |
| 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™ |
| ● ORDERING INFORMATION — ENGINEERED PLASTICS SERIES | ||||||||
| Mounting Type | Stem and Mounting | Float | Lead Wire Jacket | Min. Liquid Sp. Gr. | Operating Temperature | Operating Pressure, Max. | Float Arc Envelope | Part Number |
| 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 | TPE† | .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 | |
| 7 | Polypropylene | 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 | |
| Notes: ⚡ = Stock item. Polysulfone and Ryton® R-4 are available upon request. †Thermoplastic Elastomer Zip Cord, 22 AWG. NSF 169 versions available — contact factory. | ||||||||
| ● ORDERING INFORMATION — ALLOY SERIES | |||||||
| Mounting Type | Stem and Mounting | Float | Lead Wire Jacket | Min. Liquid Sp. Gr. | Operating Temperature | Operating Pressure, Max. | Float Arc Envelope |
| 6 | Zinc Alloy* | Nylon | TPE† | .65 | -40°F to +250°F (-40°C to +121°C) | 100 psi @ 70°F | 1.36 |
| Polypropylene | .75 | -40°F to +225°F (-40°C to +107°C) | 100 psi @ 70°F | 1.36 | |||
| 8 | Zinc Alloy* | 316 S.S. | TPE† | .80 | -40°F to +250°F (-40°C to +121°C) | 300 psi @ 70°F | 1.43 |
| Nylon | .65 | -40°F to +250°F (-40°C to +121°C) | 100 psi @ 70°F | 1.40 | |||
| Polypropylene | .55 | -40°F to +225°F (-40°C to +107°C) | 100 psi @ 70°F | 1.40 | |||
| 316 Stainless Steel | 316 S.S. | .80 | -40°F to +250°F (-40°C to +121°C) | 300 psi @ 70°F | 1.43 | ||
| Nylon | .65 | -40°F to +250°F (-40°C to +121°C) | 100 psi @ 70°F | 1.40 | |||
| Polypropylene | .55 | -40°F to +225°F (-40°C to +107°C) | 100 psi @ 70°F | 1.40 | |||
| 9 | 316 Stainless Steel | 316 S.S. | TPE† | .80 | -40°F to +250°F (-40°C to +121°C) | 300 psi @ 70°F | 1.43 |
| Nylon | .65 | -40°F to +250°F (-40°C to +121°C) | 100 psi @ 70°F | 1.40 | |||
| Polypropylene | .55 | -40°F to +225°F (-40°C to +107°C) | 100 psi @ 70°F | 1.40 | |||
| 11 | 316 Stainless Steel | Teflon® | — | .80 | -40°F to +250°F (-40°C to +121°C) | 300 psi @ 70°F | |
| †Thermoplastic Elastomer Zip Cord. *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. | |||||||
| ● ORDERING — ALLOY SERIES PART NUMBERS | ||||||||
| Type | Body | Float | Part Number | |||||
| 6 | Zinc Alloy | Nylon | 155660 ⚡ | |||||
| 6 | Zinc Alloy | Polypropylene | 179870 | |||||
| 8 | Zinc Alloy | 316 S.S. | 249315 | |||||
| 8 | Zinc Alloy | Nylon | 160950 ⚡ | |||||
| 8 | Zinc Alloy | Polypropylene | 162795 ⚡ | |||||
| 8 | 316 Stainless Steel | 316 S.S. | 249315 | |||||
| 8 | 316 Stainless Steel | Nylon | 247390 | |||||
| 8 | 316 Stainless Steel | Polypropylene | 247380 | |||||
| 9 | 316 Stainless Steel | 316 S.S. | 164870 ⚡ | |||||
| 9 | 316 Stainless Steel | Nylon | 164850 ⚡ | |||||
| 9 | 316 Stainless Steel | Polypropylene | 164860 ⚡ | |||||
| 11 | 316 Stainless Steel | Teflon® | 179445 | |||||
| ⚡ = Stock item. | ||||||||
Download Gems Sensors LS-7 Type 3 Series Single-Point Level Switch information here
Datasheet: Gems_LS-7-Series-Datasheet
Manual: Gems_LS-7-Plastic_Manual
