TDS Digital Salinity Tester/Meter for Salt Water Pool & Fish/Koi Pond Testing

I have a Hayward saltwater chlorine generation system in my pool.This is a must have to do spot checks on the system to assist in proper calibration of the Hayward.This may help someone.Before you replace your board. A question for you. !!! Are your display lights and numbers fidgeting ? If the are replace the display first. Its much cheaper than the board about $115 vs $400. If not try this also my own pool did this.I put an old board in that I had replaced the thermistor in. After a new aftermarket board lasted 2 days.I was confused about the salt level numbers saying 2.7 and red lights were on after 30 seconds or so.Turns out I needed to check all my settings. It was in metric was set for t-3 cell mine is t-15 and had to calibrate the salt level. I have a hand held electronic salt meter and it’s normally very close to the Hayward reading. I had to toggle it from off to auto a few times to get it to start counting down like you’ve seen in calibration videos then flip it up to super chlorinate and back to auto to hold the setting. But now lights are green and everything it good in the pool.

I assume this works fine in the parts per million range, but I have a mixture I know is at least 9 parts per thousand and it told me it was 2.4 parts per thousand (displaying 240x10 ppm)!

Doesn’t work

Salinity reading was way off. Cheap not accurate junk

readings not close , told seller & never heard back

Wasn't as accurate as test strips

Cheap