Sper Scientific 850062 Test Tube pH Pen
Fits standard test tubes 16x50 mm or larger.
Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize any buffer. Features hold function, and auto power off with low battery indicator. The case is IP65 waterproof and will float if accidentally dropped into the water. Comes with 2 button-cell batteries and a built-in electrode kept moist with a protective cap.
Dimensions: 9¼" × 1¼" × 1" (245 × 35 × 22 mm) Probe: 5" × ½" (120 mm × 12 mm)
Weight: 2.5 oz (71 g)
