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.

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 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 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 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. 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. 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 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 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. 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.