AP71 Meter Features:
Measures pH, mV, and relative mV to 0.01 pH and 0.1 mV
Dual display shows pH or mV, and temperature
Push-button pH calibration with auto-buffer recognition
Manual or automatic temperature compensation
Store and recall 16 readings with corresponding temperature
AP72 Meter Also Features:
Real-time clock stamps stored data and calibration data with date and time
Expanded memory stores up to 50 readings
Selectable pH buffer sets: Standard US, NIST, and DIN buffers
Selectable automatic endpoint freezes reading when stable
ºC/ºF selectable