Luster Leaf® Rapitest® Digital 3-Way Analyzer

The Luster Leaf® Rapitest® Digital 3-Way Analyzer gives you the most complete picture of your soil’s condition available in a single tool — simultaneously measuring nitrogen, phosphorus, and potassium (NPK) levels, pH, and soil temperature, with readings automatically adjusted based on temperature for greater accuracy. No guesswork about what your plants need. Just push the probe into the soil and read the digital display. Works for garden beds and container-grown plants alike. Designed and engineered in the USA. Batteries included.

Five Readings in One Tool — NPK, pH, and Temperature

Most soil meters measure one thing. The 3-Way Analyzer measures five. Combined NPK nutrient levels, pH, and soil temperature readings give you a comprehensive understanding of what’s actually happening in your soil — and critically, what needs to be corrected before plant problems develop rather than after. Knowing whether deficient growth is caused by low nitrogen, wrong pH locking out nutrients, or cold soil temperatures changes what you do about it. This tool tells you all three at once.

Temperature-Adjusted Readings — More Accurate Results

Soil nutrient availability and pH effectiveness both change with temperature — a cold soil with adequate nutrients can still leave plants struggling because uptake is limited by temperature. The 3-Way Analyzer automatically adjusts its nutrient and pH readings based on the measured soil temperature, giving you results that reflect what your plants can actually access rather than just what’s theoretically present in the soil.

Complete With Guide and Cleaning Pad

The 3-Way Analyzer includes a comprehensive informative guide with walkthrough instructions and tips for amending soil based on your readings — not just the numbers but what to do with them. The included cleaning pad keeps the probe in optimal condition for accurate ongoing readings. Designed and engineered in the USA with batteries included so it’s ready to use immediately.

Why Growers Choose the Rapitest® 3-Way Analyzer

• Five readings in one — NPK, pH, and soil temperature simultaneously
• Temperature-adjusted accuracy — readings reflect actual plant-available nutrients
• Digital display — easy-to-read results without interpretation charts
• Works for containers too — not just in-ground garden beds
• Includes guide with amendment tips — tells you what to do with the readings
• Designed and engineered in the USA — batteries included, ready to use