This professional & practical pH meter is accurate and perfect tool for testing pH of the water level. Suitable for aquarium pool, drinking water and environment water. Very convenient to change its electrode, and completes with various industry test needs. ? ? ? Features: Widely used to test the pH of solution/water. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Separated pH and temperature sensor probes pH meter. Low battery indication and 30 minutes auto power off. Data hold, Max & Min measurement function. Large & clear LCD display with bright backlight and °C/°F switch, easy to read and accurately testing. Electrode probe can be replaced - Replaceable BNC pH sensor probe. NOTE: The calibration powder is NOT included! Specifications: Brand Name: SMART SENSOR ? ?? Color: Black Material: ABS Plastic Range: pH 0.00 ~ 14.00 ? ? ? ? ? ? TEMP: -10°C ~ 60°C (14°F ~ 140°F) ? ? ? ? ? ? mV: -1400mV ~ +1400mV Resolution: pH 0.01 ? ? ? ? ? ? ? ? ?