TRUNCHEON EC METER BLUELAB
Brand:
Analog meter conductivity whose reading is determined with flashing lights that indicate the level of nutrients in various ranges. Completely waterproof and factory calibrated. With sensor for auto-on and auto-off and without external plugs or buttons. Presents the information in EC (from 0.2 to 3.6), CF (2-36) and ppm (in TDS 500 scale and 700 scale). Recommended for horticulture, hydroponics and floriculture.
No need be calibrated. Requires 3 AA batteries.