SPECIFICATIONS         MODEL                                          IOPH-10               Range   -2.00 to 16.00 pH     pH Resolution   0.01   pH Accuracy   ± 0.01pH

Specifications – DP 505: Table Top Model: DP 505 pH Mode mV Mode Range 0.00 to 14.00 pH 0 to ±1999 mV Resolution 0.01 pH ± 1 mV Accuracy 0.01 pH ± 1 digit