The Rapitest 4-Way Analyzer offers the best value, but featuring (4) premium meters in one. This multi-purpose meter allows you to monitor the conditions of soil pH, soil moisture, light quantity and total combined Nitrogen (N), Phosphorus (P) and Potash (K) levels. The extensive instructions guide you through the use of each function and also provide recommendations based on your results. A cleaning pad is also included which allows you to properly scrub the probes between uses. No batteries required.
The meter is also calibrated to the Mean Solar Table developed by USDA. It is designed and engineered solely to measure sunlight for plants.