a coulometer which measures the product (unit: C = A.s) of the intensity of the current produced in the photo-electric cell in proportion to radiation intensity (unit: A) and the duration of radiation (unit: s).
kulonmeter, ki meri produkt (enota: C=A.s) intenzivnosti proizvedenega toka v fotoelektrični celici v razmerju z intenzivnostjo sevanja (enota: A) in trajanjem sevanja (enota: s).