coulometer
/kuːˈlɑmɪtər/
noun
- An instrument used to measure the amount of electric charge (in coulombs) that passes through a circuit, often by measuring the chemical effect of the current.
- Modern coulometers are often digital and give precise readings.
- In the lab, a coulometer helped us measure the efficiency of the electrolysis process.
- The technician used a coulometer to determine the total charge in the battery.