Looking for a water hardness sensor

Hardware
1

Hi everyone. I recently noticed that the hardness(TDS) of city water fluctuates between 20ppm to 140ppm, meaning that the city must be changing water sources. Just curious is there a device that I can install to my main water line to monitor the water hardness? I’ve been searching on Amazon or eBay but didn’t find anything other these TDS test pens.

Thanks!

2

Water hardness is really hard to measure correct and fast methods like strips and pens are really not reliable. Especially with the lower values the fluctuation can be huge.

3

There are devices doing this job automatically, expensive, but reliably. Way too much for a household. But if your mission is critical, have a look… :wink:

I operate 4 of these at work and can say, they are good :slight_smile:

1 Like
4

I have two tester pen and they both show consistent test result so I guess their accuracy is good “enough” to tell the fluctuation. And it’s not a surprise that professional test equipments are super super expensive.

5

They are, way overkill for home use :joy:

1 Like