4 in 1 tds ph Meter,EC Temperature Meter, PPM Meters,TDS Water Tester for tap Drinking Water,Digital PH Pen lab pH Tester for Water hydroponics Aquarium Pools Spas
【Backlight】Both PH Meter and TDS&EC Meter have backlight function.
【PH calibration powder】The PH meter is equipped with 2 sets of PH calibration powder.Each package of calibration powder needs to be mixed with 250ml of purified water or distilled water.
【Power supply】TDS&EC pen powered by 1 CR2032 battery.The pH meter is powered by 2 LR44 batteries.
【Immersion line】When measuring, do not exceed the immersion line
【Low electricity】If the instrument shows an automatic shutdown or low battery prompt within a few seconds, please replace the battery.
【PH calibration step】The pH meter shall be calibrated in the order of 6.86, 4.01 and 9.18.
【Easy to use】When in use, it can be read by inserting it into water.
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