Aquarium Hydroponic Electrode PH Monitor Probe Smart Sensor Digital Meter BNC Connector Features: 1. Function: pH meter is an electronic device used for measuring the pH which is either the  concentration of hydrogen ions in an aqueous solution or the activity of the hydrogen ions in an  aqueous solution.  2. The pH will indicate if the solution is acidic or basic, but is not a measure of acidity or alkalinity.  3. Work in liquids though special probes are sometimes used to measure the pH of semi-solid substances. A pH meter consists of a special measuring probe (a glass electrode) connected to the body which measures and displays the pH reading. 4. BNC Connector, suitable for most pH meter and controller with BNC connector.  5. Suitable for wide range of application: aquariums, hydroponics, laboratory etc.  Specification: Material: ABS Color: As Pictures Shown Measuring Range: 0.00~14.00pH Response Time: ≤1min Solution Temperature Compensation Range: 0°C~60°C Cable Size: approx.70cm/27.6in Weight: Approx.74g/2.6oz Package list:  1 * PH Electrode Probe Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.