HI2620 Features
pH Resolution: 0.01 pH
Calibration Points: Up to 3
Data Logging: No
PC/USB Data Export: No
Standard Mode (Full Features): No
HI2621 Features
pH Resolution: 0.01 / 0.001 pH
Calibration Points: Up to 5
Data Logging: Yes (up to ~1000 logs)
PC/USB Data Export: Yes
Standard Mode (Full Features): Yes