Sper Scientific water quality pens or testers are easy to carry, simple to operate and sufficient for most field pH tests. Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. The cases are IP65 waterproof, and will float if accidentally dropped into the water. They are ideally suited for the food and beverage industry especially the Test Tube pens.
Large Display Salinity Pen - 850036
Large Display Conductivity Pen - 850037
Test Tube pH Pens - 850062,63,65,66,67
Large Display pH Pens - 850050,51,52