2pcs Digital Water Quality TDS pH Tester Pen Water Purity for Aquarium Pool

Description 2pcs Portable Pen Type 0-9990PPM Digital Water Quality TDS pH Tester with Backlight Measurement Detection Water Purity Monitor for Aquarium PoolFeature:1. The pH pen of this set of products adopts one-key automatic calibration and manual calibration of the calibration solution. which solves the problem of long storage time for automatic calibration and cannot be accurately calibrated;2. The top of the pH pen adopts a good sealing process to prevent self-consumption in a humid environment;3. The TDS pen screen has dual backlights. the screen with a TDS value of 40 and below displays green. and the screen with a TDS value of 40 and above displays red. Specification:Material: ABS plastic shellTDS detector size: 155*25*14mmPower supply: 2*LR44 button batteryTest item: TDS valueMeasuring TDS range: 0-9990PPMResolution: 1PPMError: 2%PH detector size: 155*30*15mmPower supply: 2*LR44 button batteryOperating temperature: 0-80Test item: PH valueMeasuring range: 0.0-14pHResolution: 0.01pHError: 0.05%Applicable industries: Households. hospitals. swimming pools. disease control centers. water plant laboratories. aquaculture Product description: TDS refers to the total dissolved solids in water. which can be measured by an instrument or test paper.Generally speaking. 0-50 is “ideal drinking water” and 50-100 is “mineral water”. The higher the TDS reading of tap water. the more likely the water is to have problems. Note:Due to the different monitor and light effect. the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.