Gems Sensors & Controls Datasheets for Liquid Level Switches

Liquid level switches are used to detect specific liquid levels or interfaces between liquids. These level measurements are indicated via an electrical switching action.
Liquid Level Switches: Learn more

Product Name Notes
These polysulfone level switch units are both compact and economical. They feature a variety of mountings, power requirements and electrical terminations to make it easy to find a perfect match...
These units solve the problem of point level sensing in tanks with inaccessible tops or bottoms, or at intermediate locations in larger tanks. Operation is positive and dependable. The float...
49-Inch (1245 mm) Range 2" (51 mm) Dead Band and Beam Width Optimized for Small Tank Applications 1" NPT Mounting Non-Contact Alternative To Float and Conductivity Level Sensors The UCL-510...
All Plastic Material Resists Build-Up Ideal for Viscous or Corrosive Liquids When all-plastic material is desirable and tank space is not restricted. Resists build-up of foreign material or sticky media.
All Stainless Steel FDA Compliant for Contact with Food High Temperatures and Pressures Ideal for shallow tanks or restricted spaces, or for low-cost, high volume use. Rugged construction suitable for...
All Stainless Steel FDA Compliant for Contact with Food High Temperatures and Pressures Rugged construction suitable for most corrosive liquids, and for high temperatures and pressures. All-stainless steel material of...
All-Plastic Wetted Parts - PVC, Polypropylene or PVDF 1 to 6 Actuation Levels Lengths to 70 Inches (1778 mm) Specifically designed for corrosive liquids and vapors. Three standard model types...
All-Plastic Wetted Parts 1 to 4 Actuation Levels Lengths to 20" (508 mm) U.L. Recognized; CSA Listed Versions Available Gems™ complete line of small, polysulfone liquid level switches are designed...
Bent Stem / Side Mount Design Specific Gravity as low as .45 Stainless Steel or Brass Type II version shown. These units perform in liquids with specific gravities as low...
Controls Two Independent Loads up to 5 Amps Each A single pole double throw relay enables this level switch to control two independent loads up to 5 amps each, switching...
Dependable Long Service Life Fits Small, Interstitial Spaces Easy Maintenance The Gems™ LS-10 liquid sensor accurately detects the presence of liquid in fiberglass double-wall tanks, containment sumps and double-wall pipes.
Durable sealed design – IP67, IP6K9K Developed for the most rugged coolant applications Tolerates coolant coating Small size – 2˝ (51 mm) long The CAP-300 capacitive level sensor is one...
Engineered Plastics Ideal for Shallow Tanks Low Cost/High Volume Use The durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration...
External Mounting 1/2" NPT Ideal for Small Tanks Built for durability, our LS-7 Series switches utilize stainless steel, or zinc bodies. Ideal for any small tank or vessel destined for...
External Mounting 7/8" - 14UNF Thread SAE Mounting Built for durability, our LS-7 Series switches utilize stainless steel, or zinc bodies. Ideal for any small tank or vessel destined for...
External Mounting Stainless Steel Construction Complies with FDA Food Contact Regulations Built for durability, our LS-7 Series switches utilize stainless steel, or zinc bodies. Ideal for any small tank or...
Flange Mounting No Threads Needed Ideal for Thin Wall Tanks The easy solution for thin wall tanks 1/4" thick (6 mm): ELS-1100FLG Series Level Switch. No threads needed with these...
Float Design Eliminates Problems Associated With Liming, Calcifying Applications NSF and WRC Material Compliant This compact Side Mount Level Switch is optimized for calcifying hot water applications. The Drop Float...
Fused Glass Prism for High Pressures Excellent Price-to-Performance Ratio Ideal for Corrosive Environments The enhanced ELS-1150 series is the highest performing electro-optic level switch from Gems™ Sensors. At just 1.38"...
High Temperature/Pressure Capabilities Materials of Construction Comply with FDA Food Regulations For high performance applications, these models provide high temperature and pressure capabilities. Materials of construction comply with FDA food...
Ideal for Controlling Filling Operations and Preventing Overflow Ideal in Oils and Water These units are ideal for use in oils and water. Precisely monitors liquid level and is ideal...
Ideal for Large or Small Tanks Compact Aluminum Housing Inline NPT Ports Bottle type level switches are ideal for large or small tanks or where access to the inside is...
Ideal for Large or Small Tanks Mounts Outside the Tank 3/4" Brass or Stainless Steel NPT Ports Bottle type level switches are ideal for large or small tanks or where...
Ideal for Potable Water Broad Chemical Compatibility This compact Side Mount Level Switch is optimized for calcifying hot water applications. The Drop Float design keeps critical sensor elements out of...
Ideal for Use in Oils and Water Slosh Shield Supplied with Waterproof Cable These units are ideal for use in oils and water. With a compact-sized float, slosh shield and...
Ideal for Viscosity Fluids Withstands Rough Service Intermediate Size Excellent stability for general use in oils and water. With large float displacement, switch withstands rough service; suitable for high viscosity...
Ideal in Oils and Water Level Monitoring and Temperature Switch in a Single Unit Intermediate Size These units are ideal for use in oils and water. Level monitoring and temperature...
Internal Mounting Stainless Steel Construction Complies with FDA Food Contact Regulations Built for durability, our LS-7 Series switches utilize stainless steel, or zinc bodies. Ideal for any small tank or...
Large Size 1" NPT High Pressure/Temperatur These units solve the problem of point level sensing in tanks with inaccessible tops or bottoms, or at intermediate locations in larger tanks. Operation...
Lightweight Stable in Non-Static, Highly Contaminated Liquids Bracket Mounted These units are ideal for use in oils and water. Small, lightweight, and extremely stable in non-static, highly contaminated liquids. Slosh...
Low Particle Generation-One piece Molded Design Corrosion Resistant 1 to 4 Actuation Levels in a Single Unit Lengths to 24" (610 mm) Applications: Semiconductor Process Equipment Pure Chemical Delivery System...
Low Particle Generation Corrosion Resistant PTFE Offers broad chemical compatibility for general purpose use. Also ideal for oils and water. A medium-size solution for ultra-pure liquid level sensing. Made of...
NSF Approved All-PVC Wetted Parts Available 1 to 7 Actuation Levels Lengths to 60 Inches (1524 mm) Inexpensive, all-PVC LS-800PVC Series switches bring reliable level sensing to corrosive liquids. These...
NSF-Approved Polypropylene Ideal for Potable Water and Broad Chemicals These low-cost units are ideal for high volume use in small tanks and vessels. Engineered plastics construction offers broad compatibility in...
Nylon is Ideal for Oils and Fuels NSF-Approved Polypropylene is Ideal for Potable Water and Broad Chemicals Versaplast is ideal for corrosive fluids These low-cost units are ideal for high...
Nylon is Ideal for Oils and Fuels NSF-Approved Polypropylene is Ideal for Potable Water These low-cost units are ideal for high volume use in small tanks and vessels. Engineered plastics...
Overfill protection for refrigerant tanks U.L. Recognized Provides 80% Full Shutoff Capability Overfill protection for refrigerant tanks. The LS-700F enables safe compliance with EPA directives to recover refrigerants. These units...
Particularly well suited for rough service. Ideal for use in chemical and plating applications. When all-plastic material is desirable and tank space is restricted this large size float is ideal...
Rugged brass housing Smallest Size TPE Over-Molded Electronics Durable Enough to Handle Harsh Environments The ELS-950M Series represents Gems™ smallest electro-optic level sensor developed to monitor a broad range of...
Rugged Durability Ideal for Oils and Water Broad Heat and Pressure Capabilities Small compact level switches combines reliability with low cost. The unit is equipped with a hermetically sealed SPST...
Slosh Shield Bottle Level Low Level 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...
Small Size Cushioned Float Ideal for Oils and Water These units are ideal for use in oils and water. Cushioned float and switch for turbulent liquids or excessive vibration. Easily...
Smallest Size TPE Over-Molded Electronics Durable Enough to Handle Harsh Environments Not only is the ELS-950 the smallest electro-optic liquid level sensor in our arsenal, but it also carries the...
Stainless Steel or Brass Mountings and Stems 1 to 5 Actuation Levels Lengths to 48 Inches (1219 mm) U.L. Recognized; CSA Listed Versions Available These compact units feature the rugged...
Stainless Steel or Brass Mountings 1 to 6 Actuation Levels Lengths to Over 11 Feet (3.35 m) U.L. Recognized; CSA Listed Versions Available Rugged construction and multiple options provide the...
Teflon® Body and Prism Ideal for Ultra-High Purity Applications Chemically Resistant When high purity or resistance to chemical attack is vital, ELS-1100TFE sensors are the ultimate solution. They feature...
Temperatures to 212°F HTS Version - 1/2" Long UL Approved Slightly larger than the ELS-1100, the "HT" or High Temperature version is made from high performance Isoplast plastic. While maintaining...
Up to 4 Actuation Levels Integral Siphon or Fill Tube Customized Mountings Custom Configurable Save valuable space and costly installation/maintenance time with these highly customizable sensors. LS-350 units combine siphon...
Withstands Rough Service Intermediate Size Excellent Stability Excellent stability for general use in oils and water. With large float displacement, switch withstands rough service; suitable for high viscosity liquids. Intermediate...