TDS value represents the total soluble solid contents in water. The lower the TDS value, the lower the solubility of heavy metal ions in water, the less salt, and the purer the water. This practical water quality monitor is specially designed for testing TDS value of solution level, which is suitable for drinking water, laboratory, aquarium, pool and rice fields. (NOT included), large capacity & long service life & easy to replace.[Wide Applications] Suitable for drinking water, laboratory, industrial waste water, aquarium, swimming pool, aquaculture, rice fields, etc.Specifications:Material: ABS + titanium alloy probeColor: whitePower Supply: 1 * 3V CR2025 button cell (NOT included)Detection Range: 0~4999ppmMeasurement Accuracy: ±1.5%Automatic Shutdown: √ (within 1 minute)Data Hold: √Item Size: Approx. 150*30*15mm / 5.91*1.18*0.59inItem Weight: Approx. 45g / 1.59ozPackage Size: Approx. 15.5*3.2*1.5cm / 6.1*1.26*0.59inPackage Weight: Approx. 50g / 1.76ozNote:The solution should not over the immersion line.Packing List:1 * Water Quality Analyzer1 * Users Manual (English)