Bluelab Truncheon

The Bluelab Truncheon is the most rugged and best selling conductivity meter on the international market.

It has truly stood the test of time and is a popular choice for commercial growers and hobby growers alike.

The meter is fully waterproof, doesn’t require any calibration, and has a simple to read display with no on or off switch.

Simply dip the tip of the meter into your nutrient solution and the LED’s will light up alongside your reading.

The Bluelab Truncheon measures conductivity (nutrient strength) in the values of CF, EC & ppm.

Growers requiring a pH measurement typically purchase a Bluelab pH Pen to complement the Truncheon.

Even better, if you want the whole lot in one professional meter then check out the Bluelab Combo meter.


  • EC (0.2 – 3.6), CF (2 – 36) and ppm scales (TDS and 700 scale)
  • Fully waterproof
  • No calibration required
  • Auto sense on and off
  • No external switches or adjustable buttons
  • Battery life minimum 1 year (or shelf life of battery)
  • Meter Length: 407mm
  • The Bluelab French-English Truncheon® Nutrient Meter is available with Canadian-French / English labels and instructions.
  • 5 year Bluelab Guarantee

Retail Price NZ$165.00 + GST

Wholesale Pricing is Available for Retailers 

Bluelab Truncheon Instruction Manual

Bluelab Truncheon Probe Care Instructions