Mechanical Level Switches

A reliable source for Level Switch information and leading Level Switch Companies & Manufacturers.

Mechanical level switches are distinct from non-mechanical utilities like ultrasonic level sensors, optical level switches and capacitance level sensors in that they are always meant to make direct, physical contact with the materials they are used to measure. There are many different mechanical level switch varieties. For example, float level switches, which are used primarily to measure liquid levels in storage enclosures, involve buoyant bulbs that raise and lower based on material levels. Read More…

Mechanical Level Switches Mechanical level switches are material volume measurement and control utilities that measure volume by way of a mechanical process.

Leading Manufacturers

Monterey, CA  |  800-866-0200

Sierra`s Innova-Switch&trade electronic instruments and devices represent the state-of-the-art in gaseous and liquid flow switching or liquid level control. All of our products, like the standard level switches, meet a broad range of performance and environmental application requirements. Our switches are easy to install and work reliably long term, which means you can depend on them.

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Sierra Instruments $$$

McDonough, GA  |  800-780-3776

We provide a full line of glass solutions including redline heavy wall glass, high pressure gage glass, clear heavy wall gage glass, and more. Our teams go out of our way to find the best products for your needs. Please give one of our representatives a call today to learn more information!

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BoilerSupplies.com $$$

Eagan, MN  |  800-852-9984

FPI Sensors manufactures standard and custom liquid level sensors. Our capabilities include single and multi-level float sensors, side mount, leak detection, continuous measurement, field adjustable products and custom applications. We have technology in capacitance, optical sensing and float type switches. We have the ability to modify standard products and to build complete custom designs.

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FPI Sensors International $$$

Oxnard, CA  |  800-562-2447

Since 1956, Harwil Corporation has been providing quality design and manufacturing of electro mechanical fluid flow and liquid level switches as well as pump emergency shutdown controllers. All of Harwil’s level switches are designed with a focus on producing simple, reliable, low cost units with broad operating flexibility in a multitude of physical, thermal and chemical operating environments.

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Harwil Corporation $$$

Detroit Lakes, MN  |  218-847-1317

The pioneering efforts 30 years ago made the first Tank Alert® alarm and Sensor Float® control switch. Today, SJE-Rhombus has become a leading manufacturer of reliable, trouble-free liquid level controls for the water, wastewater and sewage industries. Our complete product line includes Build-A-Panel™ control panels, engineered custom systems, Tank Alert® alarm systems, pump and control switches.

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SJE Rhombus $$$
placeholder image Sierra Instruments BoilerSupplies.com FPI Sensors International Harwil Corporation SJE Rhombus

Paddle or rotary level switches transmit information about material levels when their rotation is interrupted by contact with the materials they measure. Such systems are simple, accurate tools that can be used in all kinds of contexts. Float level switches are widely used in wastewater treatment plants, agricultural settings, in fuel and other chemical storage systems in many other settings. Rotary and paddle level switches are employed in grain silos, road salt storage systems and in many other contexts in which bulk granular solids are stored. Displacer level switches are also mechanical, and they can be applied in a wide range of contexts.

All level control utilities, mechanical and non-mechanical, can be used for level sensing or for both sensing and control. The simplest level sensors only detect and report levels in an enclosure or transmission system. For example, a simple float level switch may involve only a moving part that changes position as it comes into contact with rising materials; if sufficiently displaced, the circuit in the switch closes, indicating that the material level has reached a certain point.

The same can be true of other simple mechanical level switches like paddle and rotary switches. More complicated systems involve both reporting equipment and control equipment. Once a level is measured in such systems, a signal can be sent to control equipment that prevents the level from rising further. Such systems are very valuable in liquid enclosures, because they can prevent overfilling or other problems. Mechanical level switches offer a few advantages over non-mechanical switches.

In terms of design and construction, they are often much simpler, which means that they can be less expensive and easier to replace. That said, non-mechanical level switches, which are usually not intended to come into direct contact with the materials they measure, are less likely to become damaged or degraded by the materials they measure precisely because they are isolated from them.