Click to expand Tap to zoom UP AQUA D-815 PH replacement Probe by UP Aqua Save $-74.80 $74.80 | / SKU UPD815 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Success! We will notify you when stocks are back! There was an error signing up for restock notifications. Please try again. Features: Resolution value (reading value): 0.1pH. Error value (accurate): plus or minus 0.1pH. Can be used directly, directly connected to the pH monitor!Ā Super accurate!