★Welcome to our shop★We are a professional manufacturerWe are committed to providing you with quality products and quality services.Product name: Salinity meterTDS measurement range: 0-9999 ppmEC measuring instrument range: 0-9999 us/cmTemperature measurement range: 0-80 degrees Celsius (32.0-176.0 dF)Accuracy: -/+ 2%Battery: 1 CR2032 (included), 3V, can be used continuously for 1000 hoursProbe: Titanium alloy electrode probeProduct size: 154x30x14 mmWeight: 55 gramsApplicable to: drinking water, water storage tank, washing machine, swimming pool inspection, washing vegetables and fruits, natural water, flower fertilizer, fish farming, pure alcoholGuideline0-100 ppm ------- ideal drinking water100-500 ppm------ acceptable tap waterMore than 500 ppm --- bad conditionTDS water hardness standard0-89 ppm --------- 0-4 dh (strongly soft water)90-159 ppm ------ 5-8 dh (soft water)160-229 ppm ----- 9-12 dh (medium hard water)230-339 ppm ----- 13-18 dh (medium hard water)340-534 ppm ------19-30 dh (hard water)535 ppm or more --- 30 dh or more (strong water)Package:1* Salinity meter (without battery)■ Tips:◆ Due to problems such as light and display, the color difference of the product is normal.◆ If you have any questions about the product, please leave us a message and we will reply you within 24 hours.