Switches • Level Switches • Liquid Level Switches

Liquid level switches are operated by the presence of a liquid. When the volume of the liquid reaches a certain point, the switch is activated.

Liquid level switches are operated by the presence of a liquid. When the volume of the liquid reaches a certain point, the switch is activated.

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  • Madison Co.

    Madison Co. manufactures a number of single-point liquid level float switch types including stainless steel full-size, miniature and side-mounted; plastic full size, miniature, side-mounted and subminiature; brass full size, miniature and side-mounted; metric full size, miniature and compatible side-mounted; HVAC series condensate; and many liquid level switches.

  • ACT (Advanced Control Technology)

    Advanced Control Technology Inc. manufactures liquid level float switches including horizontally-mounted and vertically-mounted configurations. The horizontal liquid level switches include tank exterior removable, universal mountings, and miniature side entry, while the vertical switch types include continuous output, micro miniature, miniature, universal, and high buoyancy.

  • Fluid Components International

    Fluid Components International LLC designs and manufactures liquid level switches for industrial process measurement and automation-monitoring applications. The three series of liquid level switches feature thermal dispersion technology.

  • Cole-Parmer

    Cole Parmer manufactures liquid level float switches including standard switches, hinged float switches, and heavy-duty controllers. The standard switches are a LS-3 level switch that feature an operating temperature of -40 to 225F, maximum pressure of 50 psig, and 1/8" NPT. The hinged liquid level float switches feature a 1/2" x 1/2" conduit connection.


  • Gems Sensors & Controls

    Gems Sensors & Controls manufactures compact, optical water level switches that offer plus or minus 1mm repeatability. Features include: solid-state electronics, no moving parts, and one-unit installation. The company's level switches are used for medical laboratory, food and beverage system, pharmaceutical, petrochemical, leak detection, hydraulic reservoir, and machine tool applications.

  • Thomas Products, Ltd., Flow Switch Div.

    Thomas Products Ltd. manufactures level switches including custom, bottle, side-mounted, single-level, pancake, and liquid level indicators. The company's liquid level indicators are for use in hazardous locations and feature 3/4" NPT mounting sizes, operating temperatures of -40 to 225F, and operating pressures of up to 400 psi.

  • Automation Products Group, Inc. (APG SENSORS)

    Automation Products Group Inc. supplies pneumatic liquid level switches/ideal point-level switches for viscous liquid. The mechanically-activated liquid level switches feature a detection range of 8 to 200 in, shock resistance of maximum 10 g, and output contact ratings of 1 SPDT, 250 V, 10 A AC, 115 V, 0.5 A DC.

  • Omega Engineering, Inc.

    Omega Engineering manufactures two-wire liquid level float switches for use in chemicals with a specific gravity of 0.75 or higher. The switches feature stainless steel construction, a NEMA-4X or NEMA-7 rating, and can continuously monitor liquid levels with proportional 4-20mA output.

  • Dwyer Instruments, Inc.

    Dwyer Instruments manufactures a number of liquid level switch types including: capacitive, conductivity, diaphragm, displacer, float, inductive, optical, paddle, tilt, tuning fork, and ultrasonic.

  • FPI Sensors Inc

    FPI Sensors Inc. manufactures liquid level switch types including single and multi-level float sensors, side mount, leak detection, continuous measurement, temperature, optical, capacitance, 90-degree side mount and customized. The various switches are used to regulate single and multiple levels, and provide low level sensing, high level alarm, leak detection, overfill shut off, and level and temperature control.

  • Chicago Sensor

    Chicago Sensor designs and manufactures liquid level switches that utilize magnetic reed, conductivity and ultrasonic technologies. The company's line of level switch types includes miniature vertical mount, miniature horizontal mount, horizontal-mount specialty, low-level and adjustable, and heavy-duty. The company also produces stainless steel level switches for applications that involve high pressure or corrosive conditions; and side-mounting liquid level switches that come in tapered NPT and bulkhead-style fittings.

  • Harwil

    Harwil designs and manufactures a range of liquid level switches for chillers, scrubbers, carpet cleaning machinery, water treatment, fluid handling, and truck/automobile washing equipment. The switches feature electrical ratings from dry circuit to 15 amp 125/250 VAC; and temperature/pressure rating to 250F/300 psi.

  • Innovative Components

    Innovative Components manufactures vertical, horizontal, and special liquid level switches. The vertical switches are available with 1/4" NPT or 1/8" NPT mounting threads. Both the vertical and horizontal switches include a choice between a SPST or SPDT reed switch, and 24" or 20awg PVC lead wires. The special switch types include: temperature/level, bilge, high temperature/slurry, external bottle, and thermal well. The company also produces liquid level indicators/tank gauges.

  • Innovative Solutions, LLC

    Innovative Solutions LLC manufactures liquid level float switches and liquid level ultrasonic switches. The float switches are single or multi-level, with some of multi-level switches used for dirty and viscous locations or hazardous locations. The single-level switches can feature vertical or horizontal mountings; with types including stainless steel, compact, intermediate size, shielded, sub-compact, ultra low-level, and hazardous location.

  • Whitman Controls Corporation

    Whitman Controls manufactures side-mounted level switches and vertical-mounted level switches with 1/2" NPT, 1/8" NPT, or 1/4" NPT fitting types. The switches are used in liquid process systems including drinking water systems, and within the oil and gas industries.

  • Babbitt International, Inc.

    Babbitt International manufactures liquid, point level switches used in the petrochemical, food processing, water/wastewater, and OEM industries. The point level switches can feature normally open, normally closed or DPDT contacts, along with flanged process connections, low specific gravity floats, high pressure floats, or stilling wells. The switches have a maximum voltage of 100 VDC, and current of 0.5A switching/1.2A carry.

  • AMETEK Drexelbrook

    Ametek Drexelbrook designs liquid level float switches and liquid level conductivity switches. The float switches provide mechanical control for clean liquid applications, and are available for single or multiple control points. The conductivity switches are used for measuring conductive liquids that don't leave coatings.

  • Automated Products Inc

    Automated Products Inc. develops and manufactures Dynatrol liquid level control switches used for high or low point level detection of liquids or slurries. The switches feature a pressure rating of 3000 psig @ 100F, and temperature rating of 300F.

  • Global Water Instrumentation, Inc.

    Global Water Instrumentation manufactures liquid level float switches that feature current/voltage ratings of 0.14A @ 220 VAC, 0.28A @ 110 VAC, 0.07A @ 120 VDC, or 0.28A @ 24 VDC. The fully submersible and self-weighted switches include 20 feet or 22 AWG, and normally closed operation or normally open operation. Used for high level or low level operation the switches also feature a built in slosh shield that reduces false trips.

  • PGK, Inc.

    PGK Inc. produces multi-switch liquid level switches that are available with 1 to 7 switches. Designed to be used with an existing PLC controller, the switch is available as normally open or normally closed.