Today, even a cheap meter ... your probes back in time, few people would notice them. One problem is that those probes are usually good enough. We’ve all clipped an alligator clip to a test ...

Equipped with high-quality titanium alloy probes, this TDS meter ... three test modes- on/off, temperature function and hold function. It instantly tells the condition of the water.

The latest solution comes courtesy of [Keilin Bickar], who’s using the ESP8266 and a serial TTL camera module to read the characters from the LCD of his water meter. With a 3D printed enclosure ...