Test Tube pH Pen, Sper Scientific

Fits standard test tubes 16×50 mm or larger.

• Designed for simple one-hand operation
• Highly stable and accurate readings with a large LCD display
• Hold function, and auto power off with low battery indicator

Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize some other non-standard buffers as well.

Certifications: The case is IP 65 waterproof and will float if accidentally dropped into the water.

Delivery information: Comes with two button-cell batteries and a built-in electrode kept moist with a protective cap and included solution.