We acquired an Accu-Trol unit and have evaluated it in our offices. The results are here:
Disclaimer: The trade names in this page are owned by their respective companies or are the same name as the company. They are mentioned for comparison purposes only. They are in no way affiliated with System Dynamics, Inc. or WaterLine Controls™.
PROUDLY 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 process.
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We offer products comparable to the products offered by the above companies. See our website pages for further information on the products. The tradenames and trademarks in this page are owned by their respective companies or are the same name as the company. They are mentioned for comparison purposes only. They are in no way affiliated with System Dynamics, Inc or WaterLine Controls.