Replacement sensor for handheld pH meter PHP-31 1 piece

This is a sensor for the handheld pH meter SK-620PHⅡ and the tabletop pH meter SK-650PH. The internal liquid KCL cannot be refilled. Model number: PHP-311 Measurement range pH: 0.00 to 14.00 pH (operating temperature range 0 to 50°C) Temperature: 0.0 to 50.0°C Measurement accuracy: pH/±0.28pH (0~2pH), ±0.08pH (2~12pH), ±0.38pH (12~14pH), temperature/±0.3℃ (at 20~30℃), ±0.5℃ (other than those listed on the left) Sensor: pH/glass electrode, temperature/thermistor Liquid junction: Sleeve type Internal liquid 3.3mol/L KCl (cannot be refilled) Material: Electrode support tube: glass (lead-free), cord: PVC Replacement Sensor 1m cable Size: φ12×135mm Mass: Approx. 76g Accessories: Glass electrode protection bottle x 1 *To prevent the sensor from drying out, fill it with phthalic acid or water and attach it to the sensor. Code number: 6400-30 *Depending on the substance being measured, such as organic solvents, oil, strong acids, strong alkalis, and surfactants, the glass electrode may deteriorate and its lifespan may be significantly shortened.