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.

RS Hydro is a manufacturer of level sensors and transmitter for various pressure, ultrasonic, open channel, radar and capacitance level measuring applications. Hydrostatic pressure level sensors from RS Hydro are submersible sensors used for measuring the level of liquids (including corrosive liquids) in deep tanks or water in reservoirs. RS Hydro's capacitance level sensors are rugged and contain no moving parts making them easy and simple to use and maintain.

Innovative Solutions design and manufacture level sensors for a variety liquid level measuring applications. These include capacitance sensors, float level sensors and guided wave radar level transmitters. The CS01 capacitance transmitter features a simple four button calibration to set for whatever media it is measuring. Its 316 stainless steel probe comes in lengths up to 60" and is available in NEMA 4 or explosion-proof housings.