https://www.eci.us/products/valves-actuators-and-regulators/controllers-and-instruments/switches-position-sensors/topworx-go-k1p/
TopWorx GO K1P
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https://www.lordelec.com/product_categories/topworx-go-switch/
TopWorx Go Switch - Lord ElectricalLord Electrical
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https://www.valve-indication.com/product/topworx/dxs-l21gnpb/
Topworx DXS-L21GNPB - Valve Indication
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