Application: Pools, Aquariums, Labs, Aquaculture, Car washes, Water testing and Waste water treatment. Features: IP67 waterproof & dustproof housing Automatic Calibration Easy 3 points Calibration Can measure alkaline solution Display Temperature & pH simultaneously Switchable °C and °F Data Hold & ATC Auto Power off Pen size Low battery indicator Specifications: Measuring Range : 0~14pH Accuracy : ±0.2pH Resolution : 0.1pH Calibration Point : 4, 7, 10 Temperature Accuracy : ±1°C Temperature Resolution : 0.5°C/°F Temperature compensation : 0~50°C Operating Condition Temperature : 0°C~50°C (32°F~122°F) Humidity : 0~80%RH Auto Power Off (Sleep Mode) with disable feature (idle for 20min) Self Calibration Display : 4-digit display Dimension : 150 x 36 x 25mm (L x W x T) Set Includes: 1 x pH meter 3 x pH powder (pH4.01, pH7.00 & pH10.01) 4 x Button Battery English Operation Manual Standard Factory Package