I2C Interface For Smart Home 400-2000 Ppm Range Built-in Temperature Detection

Waterproof TDSTestr11 Dual Range 2000ppm 10.00ppt

Compact SCD40 SCD41 Sensor with Integrated Temp Humidity for 400 2000 ppm

400-2000 Ppm Range Built-in Temperature Detection Built-in Humidity Detection

SCD40 SCD41 Carbon Dioxide Sensor with Temp Humidity Detection 400 2000ppm

Digital PPM Meter for Home Water Safety Checks Including Scale Risk Indication

PPM Meter for Drinking Water Testing 4-in-1 Digital Pen Style Water Analyzer