Function: You know when to water, and if there is enough sunlight, you can test the pH in the soil. You can use this 3 in 1 hygrometer to adjust the pH to a suitable level. Easy to use: The 3-in-1 Hygrometer has light and pH testing capabilities and does not require batteries for indoor or outdoor use. Insert the probe into about 2-4 inches of soil and switch the switch to the tester for measurement. Accuracy readings: Moisture range: 1-10 (1-3 dry, 4-7 Nor, 8-10 wet) Relative light: 0-2000 lux (0-200 low, 200-500 low + 500-1000 Nor, 1000- 2000 high), pH range: 3.5-8 ph (3.5-6.5 acid, 7-8 alkaline). Indoor / Outdoor Design: Lightweight and portable design for indoor and outdoor use. Widely used: This triple moisture meter is ideal for soil testing kits for plant care, home and garden, lawn, farm.
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