Resolution 0.01pH
Accuracy ?0.01pH
Reading mode: auto-read and continuous-read
Automatic/manual temperature compensation
Auto-hold feature senses and locks the measurement endpoint
1 or 2 points calibration with standard recognition
Data capacity up to 200 sets for each parameter

3M 49492, Rugged Comfort Quick Latch Half Facepiece Reusable Respirator 6503QL/49492, Large, 7000128241, 10 EA/Case 