Specification: Item Type: PH Electrode Material: ABS, glass Electrode Length: Approx. 19cm/7.48in (not including cable) (shipped with liquid) Interface: BNC interface Application: Suitable for drinking water, laboratory, freshwater fish culture, swimming pool, marine fish culture, hydroponic culture Package List: 1 x PH Electrode 1 x Electrode Liquid  1 x User Manual  Features High Precision Measurement: PH electrode ensures reliable and correct measurement of PH values, ensuring the accuracy of experimental results. Unique Design: Using composite electrode technology to extend electrode life and improve performance stability and reliability. BNC Interface: With a user friendly BNC interface, the PH electrode can be quickly and easily connected for seamless operation. Easy Charging: Designed with rechargeable batteries for quick and convenient battery replacement, enabling prolonged usage. Multiple Use: Widely applicable in various fields, including laboratories, schools, and workshops, catering to the PH testing needs of different environments.