TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc.

actually works and does what its supposed to do.

works better than i expected

Works well. Some tips...- Download and Use the GravityTDS.h library instead of using the sample code. MUCH simpler and easier to implement.- Remember to pull off the cover from the tip of the probe! I didn't even notice the probe cover for the first 20 mins of trying to get it to work.- For most accurate results, buy a separate temperature probe and code your project to have the temperature sensor provide the temperature compensation value for the TDS sensor.

I've had this connected to an esp32 to monitor my fish tank. Helps give me a nice reminder if my tank is really dirty and needs a cleaning. 24/7 use for the last 2 years, no issues, and still going strong.

Plugged this into my arduino uno, copied the code from cqrobot.wiki and it seems to be working great. Tap water reads 180 ppm. Purified drinking water reads 0. Was a little worried by some of the other reviews, but I'm impressed.

i have bougt 2 of these sensors and spent countless hours adjusting code for these to calibrate, and they are just total junk.

All as described . Thank you

I found this TDS sensor to be quite well constructed. It is also easy to get working, you just plug a few cables in and submerge the two metal pins (revealed when you take the white cap off the unit). I found that this meter measured 100 ppm for my tap water and 111 ppm for coffee I made with this tap water. The problem is, I do not know if this is an accurate measurement as I do not know what the actual measurement of either my tap water or coffee made with my tap water should be. I can only note that the unit returned different measurements. I also note that there is an error in the code which is easy to fix.the code;if (millis() - analogSampleTimepoint > 40U) //every 40 milliseconds,read the analog value from the ADC {should have the { moved from within the comment to to the right of the 40U)like soif (millis() - analogSampleTimepoint > 40U) { //every 40 milliseconds,read the analog value from the ADCI also note that, if you uncomment the following code, you can get the voltage reading also:from//Serial.print("voltage:");//Serial.print(averageVoltage,2);//Serial.print("V ");toSerial.print("voltage:");Serial.print(averageVoltage,2);Serial.print("V ");