Bluelab Commercial Truncheon
 
EC(0.4-6.0), CF(4-60) and ppm scales (TDS and 700 scale) 
Fully waterproof 
Factory calibrated 
Auto sense on and off 
No external switches or adjustable buttons 
Battery life minimum 1 year (or shelf life of battery) 
5 year Bluelab guarantee 
The Bluelab Commercial Truncheon® Nutrient Meter measures the strength of a nutrient solution, just like the Bluelab Truncheon® Nutrient Meter. The Commercial Truncheon Nutrient Meter however, has been designed for hydroponic crops that require a higher than normal EC or CF requirement during their growing cycle. A reading of up to 6.0 EC or 60 CF is available.