Designed to test the water quality in 3 different parameters. It measures EC, CF and TDS without the need to purchase many different meters. Electrical conductivity (EC) and Conductivity Factor (CF) measures the ability of a material to conduct electric current while TDS is an expression of mobile charged ions (such as minerals, salts, metals, cations and anions) dissolved in a particular amount of water. The lower the EC, CF and TDS level in water, the higher its purity. In addition, the meter has a replaceable electrode that can be replaced anytime and 100% waterproof design that can withstand the wet environment. A very useful meter to measure the TDS level in various industries and applications such as aquarium, swimming pool, spa, nutrient, water hardness, hydroponics and laboratory. Special Features * 3 parameters: EC, CF, TDS with one electrode * Fully Waterproof design to withstand wet environment * Replaceable electrode * Large and clear LCD display * Data Hold function saves measured values for later use * Quick & highly accurate measurement * Built-in Automatic Temperature Compensation (ATC) * Factory pre-calibrated (mini-screw driver is included for re-calibration if necessary) * Brand new in box ready to be operated upon arrival Specifications * Measuring range: ** EC: 0.00 ~ 19.99 EC ** CF: 0.0 ~ 199 CF ** TDS: 10 ~ 19990 ppm * Resolution: ** EC: 0.01 EC ** CF: 0.1 CF ** TDS: 10 ppm * Accuracy: ±2% Full Scale (F.S.) * Automatic Temperature Compensation: 0 ~ 50°C (32 ~ 122°F) * Operating Temperature: 0 ~ 50°C (32 ~ 122°F) * Power supply: 4 x 1.5 V (AG13) Button Cell Batteries (Included and installed) * Size: approx. approx. 185 x 38 x 38mm (7.28' x 1.50' x 1.50' inch) (L x W x D) * Weight: approx. 84g (batteries included) One Set Includes * 1 x 3-in-1 EC / CF / TDS Meter * 4 x 1.5 V (AG13) Button Cell Batteries * 1 x Instruction Manual * 1 x Mini screwdriver * Protective Carrying Case