This waterproof EC meter measures the Electrical Conductivity (EC) in a solution and provides results in microSiemens per centimetre (μs/cm), the commonly measured unit. EC measures the ability of a material to conduct electric current. It has the measuring capability range from 0 to 1999μs/cm, an Automatic Temperature Compensation (ATC) to automatically adjust to the current temperature environment as conductivity is highly temperature dependent. Electrical conductivity is correlated with purity and quality of water of applications like Aquarium, Hydroponics, Water Systems, Aquaculture, Pools, Spas and many other water applications. Special Features * Waterproof design, 100% tightly & securely sealed * Automatic Temperature Compensation (ATC) * Pocket size & light, carry-anywhere design * Simple to use and provides instant measurement results * High accuracy with ±2% full scale * Quick & highly accurate measurement * Factory Pre-calibrated, ready to use it right away * Large and clear LCD display with 1μs/cm resolution * Wide range of water quality testing applications Specifications * Measure Range : 0 ~ 1999μs/cm * Resolution : 1μs/cm * Accuracy : ±2% F.S. (Full scale) * Automatic Temperature Compensation : 0 ~ 50°C (32 ~ 122°F) * Operating Temperature : 0 ~ 50 °C (32 ~ 122 °F) * LCD display : 4 digits * Power Supply : 4 x 1.5 V button cell batteries (included) * Factory Pre-calibrated * 1-point calibration if necessary * Size: approx. 165 x 26 x 26mm (or 6.50' x 1.02' x 1.02' inch) (LxWxD) * Item weight : approx. 49.5g (including batteries) One Set Includes * 1 x Waterproof EC meter * 1 x mini-screw driver (for 1-point calibration, if necessary only) * 4 x 1.5V Button Cell Batteries (Installed) * 1 x Instruction Manual * Frosted White Plastic Carrying Case