Each part of this set can be sold separately: KL920, KL921, and KL922pH range: -2.000 to 16.000pH, -2.000 to 16.000pH, -2.000 to 16.000pH pH accuracy: ±0.005pH, ±0.002pH, ±0.002pH mV range: 0 to ±1,999.9mV, 0 to ±1,999.9mV, 0 to ±1,999.9mVmV accuracy: ±0.2mV, ±0.2mV, ±0.2mVORP range: 0 to ±1,999.9mVORP accuracy: ±0.2mV Temperature range: 0 to 100˚C, 32 to 212˚FTemperature accuracy: ±0.3˚CpH calibration points: 2 pointsSet buffer: NIST, pH4.00/6.86/9.18 or USA, pH4.01/7.00/10.01Temperature compensation: 0 to 100˚C, 32 to 212˚F, automatic or manual Memory: 99 data sets with date/time stampingOutput: USB communication interfaceDisplay: 6.5-inch LCDPower requirements: 9V DC, using AC adapters, 220V AC, 50HzDimensions: 210 x 188 x 60mmWeight: 1.5kg