Hãng sản xuất: HANNA - ÝRange 0 to 300 µg/LResolution 1 µg/LAccuracy ±10 µg/L ±3% of reading @ 25°CLight Source Tungsten LampLight Detection silicon photocell with narrow band interference filter @ 525 nmBattery Type / Life 9V / approx. 40 hours of ...