Accuracy: ± 0.2ph-suitable for agricultural and educational experiments. The precision of pH 8 electronic uses the field effect of the earth on two different metals; the probe is 12 inches long for larger flower pots. This meter can measure pH and humidity at depths of up to 12 inches. No batteries are required. With special magnetic steel head, this pH tester guarantees the stability of the measurement Use: to measure the pH value and humidity of different types of soils. Directions for use: step 1: Switch humidity / PH / light position. step 2: stick the probe in the soil approximately 2-10.2? cm. Step 3: Adjust the position of the probe until the pointer on the dial swings slightly. Step 4: After 10 minutes, note the humidity / PH / light level in the dial. step 5: remove the probe in the soil and wipe clean after each use. speciation ?: Soil pH meter technical parameters: pH range ?: PH 3-8 ?; Moisture range: 1-80% pH precision: ± 0.2? PH ?; humidity accuracy: ± 1% Ambient
