TDS Meter

i need sensor to find ppm of nutrition water (around 1500 ppm), but TDS meter range is 0-1000 ppm. is there another sensor i can use for detect 1500 pmm ?

No problem - except for the ppm part as what you're measuring is of course conductivity, and it depends on the actual minerals how that relates to ppm.

See this github repository for how I do it. I normally calibrate with NaCl solutions of roughly 0.5-5 mS/cm (250-2500 ppm NaCl in water, nominal at 25°C). If you want to replicate this, make sure you use a good quality film capacitor. Polyester works fine, PP is best. Ceramic is too unstable.

Can't offer ready-made boards for sale just yet. Still fighting with the interaction between it and the pH sensor. Getting close, though. Sensors are monitoring my hydroponic setups already, basically working fine, as long as you can keep the interaction under control.

These $10 TDS meters have a range of 0 to 9990 ppm (or 0 to 9990 uS) and work quite well.