The NovoBlue TDS Meter is a large tool for home and professional use to determine the ppm -LRB- parts per million -RRB-, -LRB- physical phenomenon conductivity -RRB-, water hardness, and temperature of liquids. for a variety of professional and home uses such as as drinking water, hydroponics, aquariums, aquaculture, pool & hot bathtub, spa, car wash, food & beverage, coffee, kombucha, laboratory & knowledge domain, mixture metallic, ecology testing, laboratory & knowledge domain, and more ! . This CE-certified instrument Automatic Temperature Compensation -LRB- ATC -RRB-. It factory calibrated, but can also be calibrated by the user. The titanium probe on the sensor for accurate and speedy readings. Data function allows you to saves measurements for convenient reading and recording. Auto-off function batteries by shutting down after 5 minutes of inactivity. is TDS ? . TDS for entire melted Solids, which are the inorganic salts and structured matter in a limpid. This calcium, magnesium, sodium, etc.. Specifications TDS : 0 - 9990ppm -LRB- mg/L -RRB- Temperature Range : Fahrenheit -LRB- 32-210 °F -RRB- ; Celsius -LRB- 0-99 °C -RRB- Automatic temporary worker Compensation -LRB- ATC -RRB- : YES Accuracy : + / - 2 % Battery : 1x 3V CR2032 Dimensions : 5.9 x 1 x 0.5 inches Weight : 1.3 oz Precautions ? . Do not meter in limpid beyond the largest immersion point of 2 inches. . Do not meter in high-topped temperatures or in matrilineal sunlight. Package 1x TDS/Temp Meter 1x CR2032 Battery 1x Instruction blue-collar Bonus We 've enclosed bonus easy-to-use charts in the instruction blue-collar to help you with hi-fi PPM to EC conversion. Ever if the water in your house is considered `` hard '' or `` squishy '' as classified by the US Department of national ? . We 've you mantled with our unsubdivided charts.