![HM Digital pH 80 Meter](http://goodgrow.com/cdn/shop/products/HGC716155-01_b2bd18c1-ba91-4806-b331-4f4089e46e60_{width}x.jpg?v=1632665671)
Resolution: pH 0.1 pH, 0.00–14.0 pH. Accurate to +/-0.1 pH. Hold button and auto shut-off. Automatic calibration: Auto-ranging to 4, 7 or 10 pH. Very reliable and long lasting. Low battery indicator. Clear cap to notice moisture (or lack of) on probe. Glass encased reference electrode helps retain moisture. Batteries included.