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Bluelab Commercial Truncheon Digital Nutrient Meter

  • Based on 1,055 reviews
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Availability: In Stock.
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Arrives Tuesday, Oct 27
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Style: Truncheon (Tighter Measurement Increments)


Features

  • Quickly monitor for precise up and down adjustment of your nutrient (TDS) level in solution to maximize your grow and ensure plants get the balanced feed they need; Measures while mixing nutrients in your tank
  • Measurement Range: 2 to 36 CF, 0.2 to 3.6 EC, 140 to 2520 ppm (EC x 700), 100 to 1800 ppm (EC x 500); General uses include gardening, hydroponics growing tent and reservoir
  • Comes factory calibrated (no calibration required) and is fully waterproof; Automatic Temperature Compensation provides consistent reading regardless of any fluctuations in temperature
  • Combine with pH tester and other meters for full garden nutrients monitoring in water; Other features: Auto off function, no buttons or switches; KIT INCLUDES: AA batteries, Truncheon case, probe care kit sold separately
  • Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for growers; 5-Year Limited Warranty with proof of purchase

Description

What is the difference between the Bluelab Truncheon and the Bluelab Commercial Truncheon? Both items measure conductivity across all scales: EC, ppm 500, ppm 700 & CF. The Commercial Truncheon (the page you are on) measures a wider range (up to 6.0 EC), while the original Truncheon (the other option) measures in tighter increments. Who is this for? The Bluelab Truncheon has been tailor designed for growers who hand-mix their nutrient solutions. It's rugged design allows you to use it as a stir stick while you mix your solution, getting instantaneous conductivity readings at the same time. Who designed the Truncheon? We did! This is an original proprietary design by Bluelab, built on our over 30 years of growing & hydroponics experience. Each Truncheon is built, calibrated and tested by our trained technicians in New Zealand. Please beware of imitations. You say that this is a nutrient meter designed to last a lifetime. Can you tell me more? The Bluelab Truncheon has been built tough to withstand the day to day rigors of growing and is virtually indestructible. It is fully waterproof, does not need to be calibrated, and only needs a simple rinse after each use. There doesn't seem to be an "on" button. How do I turn it on? The Bluelab truncheon was designed to work effortlessly right out of the box. It auto detects when placed in liquid, with bright LED lights showing the measurement. No calibration is required, and the Truncheon is super easy to clean & disinfect.

Brand: Bluelab


Item dimensions L x W x H: 15.94 x 1.18 x 1.18 inches


Item Weight: 1.6 ounces


Style: Truncheon (Tighter Measurement Increments)


Measuring Range: 2 - 36 CF, 0.2 - 3.6 EC, 140 - 2520 ppm (EC x 700), 100 - 1800 ppm (EC x 500)


Measuring Range: 2 - 36 CF, 0.2 - 3.6 EC, 140 - 2520 ppm (EC x 700), 100 - 1800 ppm (EC x 500)


Output Type: Digital


Specific Uses For Product: gardening, hydroponics


Style Name: Truncheon (Tighter Measurement Increments)


Item Dimensions: 15.94 x 1.18 x 1.18 inches


Item Weight: 1.6 ounces


Brand Name: Bluelab


Model: TRUNV2


Number of Items: 1


Global Trade Identification Number: 12


Manufacturer: Bluelab


Item Highlight: Digital Conductivity Tester in Water - Scales Include EC, Ppm 500, Ppm 700, CF and TDS - Tool for Hydroponics - TRUNV2


Unit Count: 1 Count


Item Type Name: Truncheon Nutrient Meter


Part Number: 716050


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Very sturdy. Well worth the price!
Style: Truncheon (Tighter Measurement Increments)
The meter feels solid and well constructed. The plastic is thick and study (no creaking or flimsiness). The battery compartment has a proper O-ring and the rest of the unit looks to be sealed with glue/silicone. Nice Japanese OEM batteries are included so it's ready to go out of the box. It's a bit larger than other meters, but that makes it easier to handle. The lanyard very convenient when taking direct measurements inside larger reservoirs such as 50 gallon drums. Even if you do drop this meter into your reservoir it'll be fine because it's fully waterproof. This meter does not provide exact numeric measurements on a display like some others, but the LED indicators are easy to read and intuitive. If one indicator blinks, then your nutrient concentration is at that level. If two LEDs alternate blinking then the measurement is about halfway between those values. The precision should be enough for any hydroponics system. The meter turns on automatically when it detects water above the minimum PPM and turns off automatically after displaying the reading for a while. There are no controls on the meter. It doesn't turn on when immersed in common tap water, so accidental battery drain isn't a problem. The detector element itself is also very sturdy and easy to clean. I usually rinse it off every few measurements and store it in the protective case. Buy it! ... show more
Reviewed in the United States on October 23, 2015 by P

  • Great for stirring too
Style: Truncheon (Wider Measurement Range)
Its nice out of the box. I got accurate reading from this right away comparing it to two separate meters. I always wanted one and I'm glad I got it now. I still don't know if this is something you would only wanna use with large volumes or if its the perfect grow accessory for everybody. Its already better than a pen just for the fact that you can ditch one for button battery device as this uses a battery's but I can't remember if its triple or double. ... show more
Reviewed in the United States on August 16, 2025 by Adam G

  • Works Great
Style: Truncheon (Tighter Measurement Increments)
Works awesome, so easy to use and super accurate
Reviewed in the United States on January 7, 2026 by Brian

  • Best one around
Style: Truncheon (Wider Measurement Range)
Best!
Reviewed in the United States on January 6, 2026 by Jeff F

  • My favorite garden toy!
Style: Truncheon (Wider Measurement Range)
This product is a joy to use! Upgrading from a cheap Chinese-made digital meter, the experience is night and day different. The readings are quick, CONSISTENT, and super easy to read. I love that this doubles as a nutrient stir stick, and the no button/no switch design makes it effortless to use. Here's the difference between this product (commercial) and the standard truncheon: the commercial has a wider measurement range, from 0.4 EC to 6.0 EC. That's it. The standard truncheon goes from 0.2 EC to 3.6 EC. The standard model is fine for any hobbyist, but you may want the commercial if you are going to mix up nutrient liquid concentrates, and then add them to your nutrient reservoir through an automated measuring and dosing system. I purchased the commercial model because it was on sale for the same price as the standard model, and I thought "commercial" must equal "better." I probably don't need the increased range, but I have no regrets: it works perfectly fine for my purposes, and I can upgrade later to an automated dosing system if I choose. Whichever model you get, the Truncheon is absolutely worth the price of entry. It's so easy and intuitive, and cleanup is just a spritz of tap water or a dab with a towel. Nutrient testing is now my favorite part of the routine. ... show more
Reviewed in the United States on November 8, 2022 by Dave B.

  • Handy and gives you a quick reading
Style: Truncheon (Wider Measurement Range)
Very good strong product, I use it several times a day to stir my nutrients and get a quick assessment of my EC. Functions well and fast
Reviewed in the United States on February 6, 2026 by John

  • Excellent Purchase
Style: Truncheon (Tighter Measurement Increments)
01-12-26 I have been using this Bluelab Truncheon since November 2023 and it is still working great, I dip it in clean water after every each use and it has worked excellent since purchased. I feel comfortable knowing the readings are true and my hydroponics are thriving.
Reviewed in the United States on January 12, 2026 by Me Me

  • great buy
Style: Truncheon (Wider Measurement Range)
great buy
Reviewed in the United States on January 7, 2026 by william

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