You are using aggressive feeding programs because your standard meter keeps hitting the max reading before you reach your target nutrient levels.
You are managing large-scale nutrient reservoirs because manual stirring is a waste of time and you need a tool that handles both mixing and measurement.
The extra length allows you to stir the reservoir floor without needing a separate tool in your hand.
The lack of calibration buttons is a win because it removes the risk of drift during a busy work week.
Commercial growers who switched to this unit report they finally have a reliable way to verify high-concentration batches without guessing.
Operators say they stopped breaking their meters because this design handles drops into the tank better than the glass alternatives.
Bluelab Commercial Truncheon Nutrient Meter (0–6 EC)
Standard nutrient meters top out well before commercial-strength feeding programs need them to — leaving growers guessing during high-EC growth stages. The Bluelab Commercial Truncheon Nutrient Meter solves this with a larger measurement scale built for hydroponic setups that require stronger nutrient solutions, reading up to 6.0 EC, 60 CF, 3,000 ppm 500, or 4,200 ppm 700.
Built on the same trusted no-calibration design as the
original Truncheon Nutrient Meter, it's fully waterproof for splashing, submersion, or a sink to the bottom of your reservoir. Automatic liquid detection triggers bright LED readouts, and the long-format body lets it double as a stirring tool while you mix and measure at the same time.
Robust, easy to clean and disinfect, and backed by an industry-leading 5-year warranty, the Commercial Truncheon is built for daily use across demanding commercial operations. To ensure long-term precision in high-strength environments, we recommend verifying the device periodically with
Bluelab 2.77 EC Conductivity Standard Solution. For those needing to track acidity alongside conductivity, the
Bluelab pH Pen offers a compact, waterproof companion for complete reservoir management. Note: packaging may vary.
Features
📈
Larger Measurement Scale
Reads up to 6.0 EC, 60 CF, 3,000 ppm 500, or 4,200 ppm 700.
🛡️
Fully Waterproof
Splash, submerge, or sink it — built to handle it all.
💡
Automatic Liquid Detection
Bright LEDs indicate readings automatically for simple, glanceable results.
📏
Long-Format Design
Doubles as a stir stick, so you can mix and measure at once.
✅
No Calibration Required
Skip the setup — easy to clean and disinfect between uses.
🔢
All Conductivity Scales
Measures in EC, CF, PPM 500 (TDS), and PPM 700.
Specifications
Specification
Value
Conductivity (EC) Range
0.2–6.0 mS/cm
Conductivity (EC) Resolution
0.1
Conductivity (EC) Accuracy
±0.1
CF Range
4–60
CF Resolution
1
CF Accuracy
±1
TDS (ppm 500) Range
200–3,000
TDS (ppm 500) Resolution
50
TDS (ppm 500) Accuracy
±50
ppm 700 Range
280–4,200
ppm 700 Resolution
70
ppm 700 Accuracy
±70
Operating Environment
Nutrient solution, 32–122°F (0–50°C) — do not use or store outside this range
The Bluelab Commercial Truncheon Nutrient Meter is covered by a 5-year limited warranty.
Frequently Asked Questions
What's the measurement range on the Commercial Truncheon?+
It reads up to 6.0 EC, 60 CF, 3,000 ppm 500 (TDS), or 4,200 ppm 700 — a larger scale than the standard Truncheon, built for stronger commercial nutrient solutions.
Does the Commercial Truncheon need calibration?+
No. Simply dip it into your nutrient solution and read the result directly off the LED display — no calibration step required.
How waterproof is this meter?+
Fully waterproof — it's built to handle splashing, full submersion, or sinking to the bottom of a reservoir without issue.
What's the difference between this and the standard Bluelab Truncheon?+
The Commercial Truncheon reads a much wider range — up to 6.0 EC versus 3.6 EC on the
standard Bluelab Truncheon model — making it suited to stronger nutrient solutions used at certain growth stages.
Can I stir my reservoir while measuring?+
Yes. Its long-format design lets you mix and measure your nutrient solution at the same time.
What battery does it use?+
It runs on 3x AA alkaline batteries.
Happy To Help
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
