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The Bluelab Truncheon Nutrient Meter is the industry standard for measuring EC, PPM, and TDS in hydroponics. It is waterproof, requires no calibration, and uses LED lights for accurate, instant nutrient strength readings in the reservoir.
The Bluelab Truncheon Nutrient Meter is the original, industry-standard tool for monitoring the nutrient strength of your hydroponic solution. Renowned globally for its unparalleled durability and brilliantly simple operation, the Truncheon takes the guesswork out of EC, PPM, and TDS management. This rugged, waterproof meter ensures your plants receive the exact food required for maximum health and yields. Simply dip the Truncheon into your reservoir, and the flashing lights will instantly provide a precise, temperature-compensated reading, making it the most hassle-free and reliable meter for any grow room. Pair with the Bluelab pH Pen for a complete measurement system.
Key Benefits of the Bluelab Truncheon Nutrient Meter
- No Calibration Required: The Truncheon is factory calibrated and maintains its accuracy without the need for manual adjustment, ensuring reliable readings with zero maintenance time.
- Built to Last: Features robust, waterproof construction and is backed by a generous 5-year guarantee (for the meter, 6 months for the probe), making it one of the toughest instruments available for water quality testing.
- Automatic Temperature Compensation (ATC): Readings are automatically adjusted for solution temperature, guaranteeing precision and eliminating conversion errors.
- Simplified Reading: Bright, intuitive LED lights clearly indicate the precise nutrient level across four popular scales (EC, CF, PPM 500/TDS, and PPM 700).
- Long-Format Design: The meter's unique, long "truncheon" shape is specifically designed for stirring and measuring deep nutrient reservoirs simultaneously.
How to Use the Bluelab Truncheon Nutrient Meter
The Bluelab Truncheon is designed for ultimate simplicity and durability. No buttons are necessary—it turns on automatically when immersed:
- Preparation: Ensure the measuring tip is clean and free of salt build-up.
- Measurement: Dip the electrode end of the meter deep into your hydroponic nutrient solution (reservoir) up to the handle.
- Reading: Use the Truncheon to gently stir the solution for a moment. Once the meter is stable, the LED lights will flash up to the level that matches your solution's EC/PPM reading.
- Cleaning & Storage: Rinse the Truncheon under clean running water immediately after use to prevent salt accumulation. Store the meter dry in a safe location.
Grow Room Setup: For practical advice on setting up and maintaining your environment, explore 5 Essential Tips for Setting Up a Hydroponics Grow Room.
Frequently Asked Questions
Why does the Bluelab Truncheon not require calibration?
The Truncheon's electronic design and sealed probe are robust enough to maintain accuracy over its lifespan without requiring user calibration. This makes it an exceptionally reliable and low-maintenance option compared to digital meters which require monthly checks with buffer solutions.How do I read the different scales (EC, PPM 700, etc.) on the Truncheon?
The long side of the Truncheon features different columns of LED lights marked EC, CF, PPM 500 (TDS), and PPM 700. When you dip the meter, the lights will illuminate up to the corresponding level on each scale, allowing you to instantly read the nutrient strength in your preferred unit.Why is the Truncheon long/stick-shaped?
The unique, long design is intentional for use in deep hydroponic reservoirs and buckets. It allows the grower to quickly measure the nutrient solution and use the meter itself as a sturdy stirring rod to ensure an even mix, guaranteeing a consistent reading.How should I clean the Bluelab Truncheon Nutrient Meter?
Cleaning is essential to prevent salt build-up on the probe tip. After each use, simply rinse the meter under clean, running water. For a deeper clean (recommended monthly), use a specialised probe cleaner and a soft brush to gently remove any residue from the two sensor pads.SKU: 1107- Fully waterproof
- Auto on/off function
- No calibration required
- Daylight readable blue LED’s
- Battery operated
- No buttons, switches or knobs
- Provided with EC, CF, ppm 700 and ppm 500 scales
- 5 year warranty (6 months for the probe)
Free delivery on orders over £60*
- UK Mainland onlyStandard Delivery £4.95
- Heavy / Large item surcharge £2 per item
- 1-3 Days**
- UK Mainland onlyExpress Delivery £8.95*
- Next Working Day**
- UK Mainland onlyScottish Highlands £15.95*
- 2-5 Days***Can not be used with Heavy / Large items
**If ordered on a working day before 2pm cut off (Saturday and Sunday are not classed as working days).Please See Delivery and Returns page for more details.