LS-7

LS-7

LS-7

Product catalog summary
Overview: The document provides detailed specifications and operational guidelines for the LS-7 Series single-point level switches by Gems Sensors. These switches are designed for use in small tanks and vessels, offering compatibility with various liquids including water, oils, and chemicals.
Types and Mounting: The LS-7 Series includes several types of switches with different mounting options:
  • Type 3, 12, 13: Internal mounting with materials like Polypropylene, Nylon, or Versaplast™.
  • Type 5, 7, 10: External mounting, suitable for non-threaded holes using HNBR compression gaskets.
Materials and Compatibility: The switches are made from materials such as Polypropylene, Nylon, and Versaplast™, each offering different compatibility:
  • Nylon: Ideal for oils and fuels.
  • Polypropylene: Suitable for potable water and a broad range of chemicals.
  • Versaplast™: Suitable for corrosive fluids, hot water, antifreeze, and various chemicals.
Specifications: Common specifications include:
  • Switch Rating: SPST, 20VA
  • Lead Wire Gauge: No. 22 AWG
  • Mounting Attitude: Horizontal
  • RoHS Compliance: Meets EU directive 2011/65/EC
Operational Details: The switches can be configured as Normally Open (N.O.) or Normally Closed (N.C.) depending on the mounting position. The float's movement with the liquid level determines the switch operation.
Approvals: The materials used in the switches have various certifications including CE, UL, cUL, and CSA listings.
Ordering Information: Part numbers are provided based on specific material and operational requirements. Additional options like Polysulfone and Ryton® R-4 are available upon request.
Additional Notes: The document includes warnings about potential galvanic corrosion when using zinc alloy materials in certain environments.
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Catalog excerpts

LS-7-1

Sensors & Controls These low-cost units are ideal for high volume use in small tanks and vessels. Engineered plastics construction offers broad compatibility in water, oils and chemicals.LEVEL SWITCHES - SINGLE POINT Type 3 Internal Mounting External Mounting External Mounting Polypropylene, Nylon or Versaplast™. Polypropylene or Nylon; conduit connection. 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. Approvals Media Compatibility Material 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). When the switch is mounted so that the float rises with the liquid level, the switch is N.C. 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. Visit www.GemsSensors.com for most current information.

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LS-7-2

FLOAT TYPE Nylon is ideal for oils and fuels. Polypropylene is ideal for potable water and broad chemicals. Type 10 External Mounting Type 12 Internal Mounting LEVEL SWITCHES – SINGLE POINT Versaplast™ is ideal for corrosive fluids, hot water, antifreeze, chemicals and oils. Type 13 Internal Mounting Externally mounts through and seals non-threaded holes using a HNBR compression gasket. 4.093˝ (104 mm) ZIP CORD LEADWIRES 24˝ EXTENDED ZIP CORD LEAD WIRES 24˝ - 26˝ EXTENDED Side mount “Drop Down” design for calcifying hot water applications.. GASKET, HNBR (FDA Compliant) Note: R ecommended hole...

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LS-7-3

Small Size - Alloys LS-7 Series Compact Alloy and Alloy/Plastics Side Mounts LEVEL SWITCHES – SINGLE POINT 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. Common Specifications Switch Rating*: SPST, 20VA Lead Wire: 22 AWG, 24˝-27˝ Extended Mounting Attitude: Horizontal. RoHS: In compliance with EU-directive 2011/65/EC requirements for chemicals and substances....

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LS-7-4

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. How To Order - Select Part Number based on specifications required. LEVEL SWITCHES - SINGLE POINT 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 for information. Visit www.GemsSensors.com for most current information.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.