The Moisture Sunlight PH Meter 3 In1 PH Tester is a handy tool for monitoring the acidity, humidity, and light levels in your garden soil. It features a green color and compact design, with a probe size of 10mm 4mm 4mm and a probe length of 180mm. The product size is 255mm 62mm 36mm, and it weighs only 58g. Soil pH, also known as soil reaction, refers to the acid-base reaction of the soil solution. It is measured using a pH value, with 7 being neutral. A pH value less than 7 indicates an acidic reaction, while a pH value greater than 7 indicates an alkaline reaction. The Moisture Sunlight PH Meter can measure soil pH in the range of 3.5-8, allowing you to adjust the pH level according to the needs of your plants. In addition to measuring pH, this meter also measures soil moisture and light levels. The humidity range is 1-10, with 1-3 indicating dry soil, 3-7 indicating static soil, and 7-10 indicating wet soil. The relative light range is 0-2000lux, with higher values indicating stronger illumination. With these measurements, you can ensure that your plants are getting the right amount of moisture and light. Using the Moisture Sunlight PH Meter is easy. Simply insert the probe into the soil as deep as possible and turn the key on the pen to select the desired measurement. The moisture key allows you to determine if watering is needed, the pH key helps you adjust the soil pH, and the light key helps you decide if shading is required. After use, remember to wash the electrode to keep it in good condition. The package includes 1 soil meter, providing you with a convenient and reliable tool for maintaining the health of your garden plants. With the Moisture Sunlight PH Meter, you can easily monitor and adjust the acidity, humidity, and light levels in your soil, ensuring optimal conditions for your plants to thrive. Key Features: Measures soil pH, moisture, and light levels PH range: 3.5-8, Humidity range: 1-10, Relative light: 0-2000lux Compact design with a probe size of 10mm 4mm 4mm Easy to use with a simple key selection Helps adjust soil pH and determine watering and shading needs Includes 1 soil meter for convenient monitoring Ensures optimal conditions for garden plants Promotes healthy growth and development