laboratory equipment, namely, electrode sensors used for measuring PH levels

Measuring, detecting and monitoring instruments, indicators and controllers, namely, gauges and sensors for measuring, testing and checking the temperature, [ pressure, ] quantity, composition and concentration of gas and liquid; electrodes for sensors; cathodes; pH and oxidation reduction potential (ORP) sensors, [ conductivity sensors, optical sensors, ] electrochemical sensors and gas sensors for measuring gas concentration; diaphragms for scientific apparatus, namely, diaphragms for pH an...