ShropsWindowCleaner
Well-known member
- Messages
- 152
- Location
- midlands
Just received my HM digital TDS meter. I’ve been using a cheap one off ebay for some time now, which has been reading my tap water as 270ppm. Just tried my new HM digital TDS meter in the same water and it measures 430ppm! Could this be correct? That’s a HUGE difference ??