Dwyer Instruments, Inc. offers a variety of level switches, including: tilt, optical, displacer, conductivity, and capacitive. Switches have a variety of feature options, including: compact, LED indication, non-mercury probes, adjustable time-delay, fixed/adjustable deadband, hermetic sealing, multiple stages, differential level service, tank high/low control, etc. Sensors are made from 316 stainless steel, PFA, and polysulfone materials. Other products offered by Dwyer include: ultrasonic, tuning fork, inductive, float, diaphragm, etc.

Thomas Products, Ltd. offers side mounted, pancake, and bottle level switches. Switches have operating pressures ranging from 50 to 2500 PSIG, operating temperatures ranging from -40 to 450°F, and mounting sizes ranging from 1/8" to 1" NPT. Switches are made from the following materials: PVC, stainless steel, cunife magnet, hysol epoxy, beryllium copper, 316 stainless, etc. Switch applications include: leak detection, viscous liquids, contaminated/dirty liquids, etc. Other switch products offered by Thomas include: liquid level indicators, single level, custom level, and associated accessories.

Omegan Engineering, Inc. offers a variety of level switches, including: ultrasonic point, tuning fork, solid state RF, optic & leak detection, and buoyancy. LVU-A700 Series solid state liquid level switches have temperatures ranging from -20 to 160°F, an input power range from 6 to 24 VDC, and pressures up to 1000 PSIG. Other product features include: ultrasonic technology, solid state integral electronics, full epoxy-sealing, etc. Other switches offered by Omegan include: relays, dry material switches, horizontal/slide mount, vertical mount float, controllers, etc.

Madison Co. offers level float and liquid level switches. Switch configurations include: conductivity, hydrostatic pressure, radar level, ultrasonic, level switch & temperature combinations, continuous level float, and custom configured multi-level float. Stainless steel full size liquid level switches allow temperatures up to 200°C, they have float sizes ranging from 1/2" to 2" in diameter, and a maximum pressure of 500 PSIG. Applications include: wastewater, water, petrochemical, medical, appliance, food, etc.

Advanced Control Technology offers horizontally and vertically mounted liquid level float switches. Product options include: high buoyancy, universal, miniature (modified stem), micro-miniature, custom assemblies, continuous output, universal mountings, removable tank exterior, miniature side entry float, etc. Continuous output liquid level sensors feature a 1/2" accuracy, they can be customized to customer applications, and come complete in a plug in package. Optional features include: up to 33-240 ohms, a 4-20 mA output, accuracy up to 1/4", and up to 1-10 volts.

Harwil Corp. offers L Series level switches for the truck/automobile, fluid handling, water treatment, carpet cleaning machinery, scrubber, and chiller industries. Switches have electrical ratings up to 250 VAC, temperature ratings up to 250°F, and pressure ratings up to 300 PSI. Wetted switch materials include: Fortron, Noryl, Hastelloy C-276, 316 stainless steel, red brass, etc.

Innovative Solutions LLC offers ultrasonic liquid level switches, liquid level interface switches, and float liquid level switches. U002/U003 Ultrasonic level switches have maximum pressures of 1500 psig, process temperatures ranging from -40 to +185°F, and input voltage ranging from 10-35 VDC. L170 Series compact/alloy level switches have pressure ranges from 150 to 1000 PSIG, maximum currents to 120 VAC, and can withstand temperatures to 500°F. L500S Series adjustable suspended level switches have maximum pressures of 150 PSIG and temperatures up to +300°F. Switches are made from brass, Buna-N, PVC, stainless steel, PVC, and Teflon materials.

BlueLevel Technologies, Inc. offers bin level switches in the following configurations: Model VHS "Fork" style vibrating, Model VHS vibrating element "Rod", high temperature bin level indicators, Model CPH capacitive proximity, and Model RH/RHX rotary bin level indicators. Model RH/RHX rotary bin level indicators can detect the absence and presence of bulk solids ranging in density from 5 to over 100 lbs per cubic ft. Other features include: high intensity LED's, temperature allowances up to 750°F, a four shielded bearing design, and a heavy-duty synchronous drive motor.

Fluid Components International offers level switches and fluid level switches for automation and industrial process management. Switches have applications for: premium level monitoring, general purpose monitoring, flow monitoring, fast response monitoring, multipoint level monitoring, ultra-fast response level monitoring, etc. FLT93S FLexSwitch level switches have operating temperatures ranging from -100°F to +850°F, operating pressures to 3500 PSIG, and an accuracy rating of ±0.25".

Cole-Parmer offers a variety of liquid level float switches and controllers. Switches accept 120/240 VAC, they operate as normally open or closed, and are hermetically sealed for durability/long life. Other features include: a mount size up to 5/8", a maximum PSI of 300, and an operating temperature range of 40 to 225°F. Switches are constructed from the following materials: CPVC, 316 stainless steel, Buna-N, brass, epoxy, Kynar PVDF, 304 stainless steel, polycarbonate, beryllium, copper, polypropylene, etc.