Test Tube pH Pens

Fits standard test tubes 16 x 50 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 some other non-standard buffers as well. Features hold function, and auto power off with low battery indicator. General Purpose Glass Probe: EPA compliant for labs and wine Penetration Probe: for food & soil Flat Tip Probe: for meat, leather, paper, skin, and other surface pH measurements Dimensions: 9" × 1⅜" × 1" (225 × 35 × 20 mm)Weight: 2.3 oz (66 g)< Specifications Model: 850062 850063 850065 850066 850067 Tip: General Purpose Glass Flat Penetration Range: 0 to 14 0 to 14 0 to 14 2 to 12 2 to 12 Resolution: 0.01 0.01 0.01 0.01 0.01 Accuracy: ±0.2 pH ±0.1 pH ±0.1 pH ±0.1 pH ±0.1 pH Auto 3pt Calibration: IP65 Waterproof: Indicates Low Battery: Auto Power Off: Auto Buffer Recognition: Hold: