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Single & Multi Float Level Switches
From simple, high-volume reed switches to specialist technologies designed for more challenging environments, Gems Sensors & Controls offer an extensive choice of float-type level switches.
The company has a strong reputation for collaborating with in-house engineering teams, bringing a detailed understanding of the design and operational factors involved with each application.
Often, the choice of sensor is dictated by the media to be measured, such as its specific gravity, viscosity or corrosiveness. Sometimes, design constraints relate to the best way to integrate the sensor, including its position, mounting and size within a restricted space.
Gems offer hundreds of single- and multi-point models, including specialist options for food use, ultra-pure liquids or hazardous chemicals. Components can also be custom designed or modified using 3-D modelling or integrated into subassemblies.
To discuss a project requiring liquid level measurement, or to request a test sample of a float switch for your product design, call +44 (0) 1483 869 700 or email sales@hawco.co.uk.
Downloads
Single Point: Side Mounted (Horizontal) Float Switches
Side-mounted reed-style float switches which rise or lower with liquid level for either normally open or normally closed operation. ‘Drop down’ design for calcifying hot water applications (NSF approval)
| Part | Material | Mounting | Compatible Media | |
|---|---|---|---|---|
| LS7-165570 | Nylon | Internal (Type 3) | Oil, Fuel, Hydrocarbons | Datasheet |
| LS7-164520 | Polypropylene | Internal (Type 3) | Chemicals, Water | Datasheet |
| LS7-131100 | Polypropylene | External (Type 5) | Chemicals, Water | Datasheet |
| LS7-140620 | Nylon | External (Type5) | Oil, Fuel, Hydrocarbons | Datasheet |
| LS7-177100 | Versaplast | External (Type 5) | Oil, Antifreeze, High Temp Corrosive Fluids, Chemicals | Datasheet |
| LS7-160450 | Polypropylene | External (Type 7) | Chemicals, Water | Datasheet |
| LS7-160460 | Nylon | External (Type 7) | Oil, Fuel, Hydrocarbons | Datasheet |
| LS7-165800 | Polypropylene | External (Type 10) | Chemicals, Water | Datasheet |
| LS7-191080 | Noryl | Internal (Type 10) | Portable Water, Limited Chemicals | Datasheet |
| 'Drop Down' Type 12 | ||||
| LS7-191080 | Noryl | Internal (Type 12) | Portable Water, Limited Chemicals | Datasheet |
For oils and fuels, select Nylon.
For potable water and broad chemicals, select NSF Standard 169 polypropylene.
For corrosive fluids, hot water, antifreeze, chemicals and oils, select Versaplast™.
Also available for rugged environments with stainless steel or zinc bodies
Single Point: Top or Bottom Mounted (Vertical) Float Switches
Top or bottom mounted reed-style float switches which rise or lower with liquid level for either normally open or normally closed operation. ‘Drop down’ design for calcifying hot water applications (NSF approval)
| Part | Material | Mounting Type | Compatible Media | |
|---|---|---|---|---|
| LS3-42295 | Polysulfone | 1/8" NPT | Water Based | Datasheet |
| LS3-142505 | Polypropylene (Hollow) | 1/8" NPT | Chemicals | Datasheet |
| LS3-171517 | Polypropylene (Hollow) | 3/8"-16 | Chemicals | Datasheet |
| LS3-116826 | Polypropylene (Solid) | 1/8" NPT | Chemicals | Datasheet |
| LS3-171514 | Polypropylene (Solid) | 3/8"-16 | Chemicals | Datasheet |
| LS3-162745 | Nylon/Buna | 1/8" NPT | Oils, Fuels | Datasheet |
| LS3-173250 | PVDF | 1/8" NPT | Ultra-Pure | Datasheet |
Also available for NSF approved water use using Polypropylene NSF Std. 169 material
Large and alloy versions also available plus miniature and micro floats
Single Point: Electro-Optic Solid State Fluid Sensors
Electro-optic sensors are designed to detect rising liquid by using light from an infrared LED and a light receiver. When the LED is covered, light no longer reaches the receiver. These sensors are used in a wide variety of applications including medical laboratory equipment, food and beverage systems, hydraulic reservoirs, petrochemicals and pharmaceutical production. Low-cost, compact and easy to install, optical level sensors have no moving parts making them highly reliable.
| Part | Input Power | Probe Condition at Current Sink |
Mounting Type | |
|---|---|---|---|---|
| ELS-1100-142700 | 10-28 VDC | Wet | 1/4" NPT | Datasheet |
| ELS-1100-143585 | 10-28 VDC | Wet | 1/4" NPT & 3/8" Conduit | Datasheet |
| ELS-1100-169555 | 10-28 VDC | Wet | M12X1-8G | Datasheet |
| ELS-1100-143570 | 10-28 VDC | Dry | 1/4" NPT | Datasheet |
| ELS-1100-143590 | 10-28 VDC | Dry | 1/4" NPT & 3/8" Conduit | Datasheet |
| ELS-1100-148973 | 10-28 VDC | Dry | 'Fish' Pull Ring | Datasheet |
Electro-optic sensors are not recommended for use in any liquid that crystallizes or leaves a solid residue. Available in engineered plastic, stainless steel, alloy or Opto-Pak materials.
