This user-friendly and hardy handheld pen will take measurements in increments of 0.1 pH and is fully temperature compensated, so you can expect accurate readings every time.
 
Fully waterproof - not just water resistant
Simple two-point calibration process for accuracy
One-year peace-of-mind warranty
Automatic temperature compensation for accurate readings everywhere
Auto-off function to extend battery life
1 AAA battery included - simply power on and go