Bluelab Truncheon Nutrient Meter

Stir and Measure Nutrient Strength in One Motion, 0.2–3.6 EC

Mixing a reservoir and then checking its strength usually takes two tools and two steps. The Truncheon's long-format wand lets you stir the solution and read conductivity at the same time. It detects liquid automatically and lights a temperature-compensated reading on its LED scale.

It suits home growers who want a durable meter with no setup and commercial staff checking many reservoirs a day. The 0.2–3.6 EC range covers typical feeding strengths; for stronger solutions, see the Commercial Truncheon.

Key Features & Benefits

• No calibration required — ready to use and easy to clean and disinfect.
• All conductivity scales — EC 0.2–3.6, CF 2–36, ppm 500 100–1800 and ppm 700 140–2520.
• Waterproof construction — robust body built for daily reservoir use.
• Automatic liquid detection — bright LEDs show the reading as soon as the tip is submerged.

Who Should Use the Truncheon

Growers who want a durable, no-fuss nutrient meter for daily reservoir checks, from home hydroponic setups to commercial mixing stations. It is a strong fit where meters get dropped, splashed or shared.

About Bluelab Truncheon Nutrient Meter

The Truncheon is Bluelab's long-format nutrient meter. It runs on 3x AA alkaline batteries, measures with ±0.1 EC accuracy at 25°C / 77°F, and carries a 5-year limited warranty.

Frequently Asked Questions

Why does the Truncheon need no calibration?

Bluelab designs the Truncheon's conductivity sensor to hold its accuracy without user calibration. Keeping the sensor clean is the main maintenance task. You can confirm accuracy with a 2.77 EC conductivity standard if you want a check.

What EC range does it cover?

The standard Truncheon reads 0.2–3.6 EC (2–36 CF, 100–1800 ppm 500, 140–2520 ppm 700). If you run stronger nutrient solutions, the Bluelab Commercial Truncheon reads up to 6.0 EC.

How do I read an LED scale?

The Truncheon lights LEDs along its scale to show where your solution sits. You read the value beside the lit LED in your chosen unit. The display is easy to read at a glance during mixing.

Is the Truncheon waterproof?

Yes. The Truncheon is fully waterproof, so it can be used to stir solution and can be cleaned and disinfected easily. Its robust construction is built for long-term use.