Beakers + Measuring Glasses

Nutrient measuring equipment turns a label rate into an exact dose, so every reservoir mixes the same way. Pipettes suit sub-3 ml additives, syringes the larger shots, and scales the dry salts. Test sap and finished flower with Brix and potency readers.

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Beakers + Measuring Glasses

Nutrient Measuring Equipment: Syringes, Scales and Testers

Nutrient measuring equipment covers the small tools that get the right dose into the tank and the right reading out of the crop. This collection holds graduated pipettes and syringes for liquid additives, Gro1 digital scales for powders, and testing instruments from Milwaukee, Purpl and Valenveras....

Nutrient measuring equipment infographic: pipettes, syringes, digital scales, Brix refractometer and potency readers

For pH and EC readings, see our pH, PPM and EC meters. Both sit under grow tools and gear.

Types of Measuring Tools

Pipettes and Syringes

Disposable 3 ml pipettes are graduated from 0.5 to 3 ml, which covers most additive rates in a small reservoir. Use one per product so a pH adjuster never meets a microbial inoculant. Grow Crew 10 and 20 ml syringes handle larger doses without pouring.

Digital Nutrient Scales

The Gro1 Nutrient Digital Scale weighs up to 1,000 grams in 0.1 gram steps, with a removable bowl and tare. For bigger batches of dry nutrients, the Grow1 scale reads up to 5 kg in 0.5 gram steps.

Brix and Potency Testers

The Milwaukee MA871 reads Brix from 0 to 85% with automatic temperature compensation. Purpl PRO screens ground medicinal flower for potency in under ten seconds, within about 2%. The Valenveras portable lab uses near-infrared scans and returns readings in 30 seconds.

How Growers Dose and Test

Work out the dose for the whole reservoir once and write it on the lid. Add each part to moving water, never on top of another concentrate. In-house potency readers are for screening; labels and shipments still need a licensed lab.

Frequently Asked Questions

How to measure nutrients in hydroponics?

Measure liquids by volume and powders by weight, then check the mixed tank with a meter. A 3 ml pipette covers small additive doses. Syringes handle 10 to 20 ml, and a Gro1 scale weighs dry salts to 0.1 gram. Finish with a pH and EC reading before feeding.

What does a Brix refractometer measure?

It measures dissolved solids as a percentage, read from how light bends through a sample. The Milwaukee MA871 needs two or three drops and reads within 0.2% Brix. Zero it with distilled water, then squeeze sap from a few balled-up leaves onto the prism. On plant sap the figure moves with time of day and leaf age, so compare a plant against itself.

How to measure small amounts of liquid?

Use a graduated pipette for anything from 0.5 to 3 ml. Draw past the mark, then release slowly back to the line with the pipette upright. Read at eye level, since looking down at the meniscus reads high. Above 3 ml, switch to a graduated syringe.