Test Tube pH Pens Please Select an Option::850066 | Test Tube pH Pen w/Flat Tip offering up to 3 hours

offering up to 3 hours of continuous water diffusion

Each tray has built-in channels to accommodate drip irrigation (optional)

it ensures a safe growing environment for organic and sustainable gardening

and IP66 waterproof

Storing hydrogen peroxide in a cool

Test Tube pH Pens Please Select an Option::850066 | Test Tube pH Pen w/Flat Tip offering up to 3 hoursFits 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