Bluelab pH Pen – Waterproof Handheld pH & Temperature Meter | Double-Junction Probe | Made in NZ ASP-20 300 hours of continuous use

300 hours of continuous use (battery included)

Sachets per box: 25

Add the pre-measured reagents to your water sample

Submerge the probe in MA9070 zero oxygen solution and stir for about 2-3 minutes

Bluelab pH Pen – Waterproof Handheld pH & Temperature Meter | Double-Junction Probe | Made in NZ ASP-20 300 hours of continuous useBluelab pH Pen Waterproof Handheld pH & Temperature Meter The go to pH pen for growers worldwide. The Bluelab pH Pen (SKU: PENPH) is a compact, hardy, and easy to use handheld meter that delivers accurate pH and temperature readings in any nutrient solution. With a double junction pH probe, 0. 1 pH resolution, simple 2 point calibration, and a fully waterproof design that floats its the essential measurement tool for every growing setup, from home