The soil detector only tests soil and soil, and is not suitable for dry flour/small stones/organic wood/sawdust/liquid particles, etc. When inserting the probe into the soil, please try to maintain a depth of 10cm or more. To improve the accuracy of measurement results, please use the method of taking the average of multiple point tests when measuring. When using, be careful not to touch stones when inserting the electrode, and do not apply too much force, otherwise it may damage the electrode. The detector should not be inserted into the soil for a long time as it is prone to oxidation and damage to the electrode.<br><br>Hign-concerned Chemical:None DIY Supplies:ELECTRICAL Colour:As Shown Material:ABS<br><br>Package Contents: 1 * Soil Humidometer<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.