Hanna GroLine HI98331 Direct Soil EC Tester | Penetration Probe Compost Teas The spring-loaded antidraft damper can

The spring-loaded antidraft damper can be fully or partially inserted into your duct work using the rubber rings to hold itself in place

Multi functional packaging

500 Packets Per Master Case: One case

The integrated reflectors push photons toward the canopy edges

For nutrient solutions correction: 5 mL per Liter to address deficiencies

Hanna GroLine HI98331 Direct Soil EC Tester | Penetration Probe Compost Teas The spring-loaded antidraft damper canWhat a Direct Soil EC Meter Saves You The old routine was a slurry. Take a sample, mix it with distilled water at a set ratio, wait, filter, then read the extract. It works, and it takes long enough that most people skip it. The HI98331 puts a stainless steel penetration probe into the substrate and reads it where it sits. Range runs 0 to 4000 uS cm, resolution 1 uS cm. One button, one point calibration, done automatically against a 1413 uS cm