Electronic Control Boards for Reverse Osmosis Water Purification Systems

Building a Reverse Osmosis Water Purification System?

Choose the best controller for your system.

ESDI control boards are easy to use and easy to install. They are accurate, very reliable and come with a two year warranty.

ESDI Model 250C R.O. Controller

for 24VAC 5W Valves
for O.E.M. Manufactures of RO Systems

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ESDI Model 258 R.O. Controller

*Our most popular RO Cotroller
for 115/230VAC Valves
for O.E.M. Manufacturers of RO Systems

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ESDI Model 500 R.O. Controller

for 115/230VAC Valves

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ESDI Model 503 R.O. Controller

for 115/230VAC Valves

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ESDI Model 190100 R.O. Controller

(Uses our popular Model 258)
with Continuity Monitor & Hour Meter

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Reverse osmosis: the process of purifying water