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An Electronic Water Controller Again!

Jan 15, 2011 by Jerry H

I hold your company in the highest regard as far as customer service goes. You folks are top notch. Thanks again!


Mar 17, 2015 by Dan - Fountain Supplier in Los Angeles

Wow! I was just on a job that had one of your controls on it for the past 10 years and it looks like it has never been in the water, it was so clean!

Waterline Controls 1-888-905-1892 1930 E 3rd St, Suite 8 Tempe AZ, 85281 USA 0.0 0.0 0 0 Reviews for my site

Where to Buy

Contact Us

Explore Your Options

  • Ametek Solidstate Controls are not engineered for specific applications like ours.
  • We suggest solid state sensor probes which are usually lower cost, not electric float switches like Dwyer Instruments.
  • We designed and manufacture our own UL and CSA listed Water Level Controls, Evapco - Cooling Towers is a reseller providing third-party non-UL, non-CSA devices.
  • Flowline uses Ultrasound technology, but the reflective nature of the fuels, water or walls can create false levels and indications unlike physical probes.
  • We provide complete kits of engineered products for the application, not individual items for client configuration like Gems Sensors.
  • Honeywell makes temperature sensors. We make a software operated advanced control panel with a temperature sensor to operate a cooling tower basin heater.
  • Madison Float Switch Madison produces rudimentary float switches. We manufacture more advanced electronic level controls with multiple set points.
  • Marley Cooling Towers is a reseller of Water level controls and is in the business of heat transfer. We are in the water level control business.
  • We offer a larger selection of products for whole commercial building or industrial application , plus we cost less than SJE Rhombus and have a tank alert for high and low levels.
  • Warrick Controls sells to value added fabricators that assemble and resell. We produce fully engineered product packages for specific applications and we sell to the installer directly.

Industry Leading Experience

After more than 20 years revolutionizing the recreational water industry with our low-maintenance water level controls and supremely accurate liquid level sensors and level switches, Waterline Controls is now applying its design knowledge, manufacturing experience and customer service expertise to the electronic level switch for commercial and industrial applications where water level management is critical. Our controls unit comes as a kit with an electronic water level controller, sensor and the mounting assemblies. They can be customized to fit your specific needs.

Features and Benefits


No moving parts or mechanical floats to break or rust.

Built to Last

Makes it easy to integrate with existing Building Management Systems and has an expected useful life of fifteen years.

Dry-contact Digital Circuitry

Quickly view the status of all functions.

LED Indicator Lights

An LED indicator light for each output and fault conditions for easy testing and evaluation.

“Press to Test” feature

One push of the button starts a complete validation cycle to ensure all systems are working properly.

Advanced Modular Design

Save money by easily replacing individual parts instead of replacing the entire unit.

Reliably Accurate

Compensates for wave action and manages water levels to within 1/8” of operating range.

Best Tech Support in the Industry

No runarounds, no guessing, no stupid answers – you’ll be talking directly to the guy who’s been designing & installing these units for more than 20 years.

Best Warranty in the Industry

Every unit is backed by our 100% Satisfaction Guarantee.


When you are ready to buy, visit our Where to Buy page to locate your local distributor, or call 888-905-1892.

Project Examples

If you're still not sure about Waterline Controls Technology just ask some of our clients. Here are a few unique projects we've done over the last five years where water level control can be mission critical:

  • We are on the majority of data centers for:
    • Microsoft
    • Apple
    • Google
    • Dell
    • Facebook
  • Gallo wine bottle production factory which has 2 different bottle production lines
  • A Salt Water Fishery in Hawaii (where conductivity technology could not survive due to the saltwater)
  • A Nuclear Facility in Wisconsin (contained eight separate water silos)
  • Rainwater harvesting tanks for two high-rise residential buildings in Minneapolis
  • We are not just another product, but a revolutionary technology designed for all of your water level control means.

    Satisfaction Guaranteed

    With over 150,000 successful installations of our technology, our modular liquid level sensors guarantee trouble-free level control. These water level controls will eliminate the hassle and frustration normally associated with existing float switches, ultrasonic or other electric level controls.

    See our Lifetime Limited Warranty. All our models are backed by a 100% Satisfaction Guarantee - IF IT DOESN"T WORK WE WILL TAKE IT BACK - PERIOD.

    The liquid level sensors we use completely eliminate the chance of injury due to electrical shock during installation or maintenance, and are Listed to UL508 Standard by ETL. There is no need for calibration unlike a great deal of our competitors because it is designed for use in water.

    Made in the U.S.A.

    All of our liquid level controls and liquid level sensors are assembled right here in the U.S.A. where we monitor every step of the manufacturing process. That gives us the confidence to guarantee your satisfaction. Once you experience the accuracy and reliability of our water level sensor and control unit in the field, you'll be convinced that their easy installation, superior performance and long-term durability compared to float switches make them the right choice for any situation. We guarantee it!

    You can use our Application Matrix to find which product fits your application best.

    Additional Industry Applications

    Virtually any industry will have to store significant volumes of water for either their production operations or various plant management systems. Many of those industries are using seriously out-dated technology and making due with components that are expensive and difficult to maintain.

    A Complete Solution

    What Waterline Controls offers is a complete, simple, and reliable solid state electronic level control system, following a modular design that allows for easy maintenance, while insuring that all your components will happily work together. When you start mixing components from third party manufacturers (a float switch, extra level switch, liquid level sensor), mysterious problems have a habit of cropping up. Save yourself a huge headache, and go with the complete system that has a 100% guarantee, backed by over 20 years of experience in the field.