Four-in-one test pen: pH/EC/TDS/Temperature test pen PH: 0.00~14.00pH TD:< /p> 0~ 1999ppt 0~ 19.99ppt Temperature: 0~50°C/ 32~122°F CE: 0~1999uS/cm 0~1999mS/cm Easy to use: 5 seconds to know the quality of water, precise and fast. A combination of this TDS PH EC temperature set. Pocket size and portable: small but suitable for testing pH balance in drinking water, swimming pools, aquariums, water systems reverse osmosis, hot tubs or hydroponics.
