Madison manufactures a variety of liquid level sensors and switches: single point liquid level float, optical level and single point conductivity sensors, multi-point level and multi-point conductivity sensors, radar level and ultrasonic, pressure and continuous read sensors. The MAD4500 and MAD4510 represent Madison's submersible pressure sensors line. The MAD4520, a hydrostatic submersible pressure sensor. is ideal for vessel applications involving viscous material and turbulent conditions.

Automation Products Group manufactures liquid level sensors including switches for single point and multiple point applications, as well as continuous level sensors for continuous reading of liquid levels through an analog output. Continuous level sensor models include self-contained ultrasonic sensors, remote controlled ultrasonic sensors and submersible liquid level transmitters.

Advanced Control Technology designs and manufactures electronic liquid level sensors for monitoring fluid level and temperature in a single assembly. The 4000 series liquid level sensors feature field adjustable level switches, rugged solid cellular or stainless float design, temperature switch with 1°C repeatability, 5° C accuracy and up to 15 ampere heavy duty switch. Options include custom lead wires, custom molding, female threads, jacketed cable and metric-British threads.

SAP Con is a manufacturer of level measurement instruments including a variety of liquid level sensors such as tuning/vibrating fork level measurement sensors for accurate level measurement of liquids of solids in vessels, capacitive level measurement sensors for rf capacitance level measurement, rf admittance level switches and conductivity level switches for measure water and liquid level sensors and indicators that work on the conductivity based level measurement principle.

Ametek Drexelbrook is a manufacturer of a wide range of level measurement equipment including point level sensors and various continuous level measurement senors. Ametek Drexelbrook's continuous level measurement products come in a variety of configurations with models including smart check well, drop-in-displacer, desalter and RCT RF.