Portable Digital pH & mV & Temperature Meter, Lightweight and ergonomical, with waterproof housing, Large LCD display. Simple to calibrate by one keyboard. Supplied complete in a carring case, with instruction manual and calibration buffers set. pH Range: -2.00 / 16.00 pH ; accuracy: ± 0.01+1 digit ; resolution: 0.01. Temperature Range: 0 / 90°C ; mV Range: 1000 / 1000. Isolab Germany