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Dr.meter 27CM Soil Moisture Meter, Plant Watering Indicator & Hygrometer Sensor for Gardening Gift, Indoor & Outdoor Plants, No Battery Needed

Dr.meter 27CM Soil Moisture Meter, Plant Watering Indicator & Hygrometer Sensor for Gardening Gift, Indoor & Outdoor Plants, No Battery Needed

Q: Why it still reads dry even when I just watered my plant?

I’m having the same problem. I’ve waited and even measured the next day. I can feel the soil is still wet and it reads dry. I don’t get it.

Q: Can I put this item into the water to test the accuracy?

Please could not put this item into the water. Thanks! Here is some notes for your reference, thanks! -Don't measure liquids especially water, it is only used to test the soil moisture. -Choose a soft soil, forbid to force the metal probe into the hard soil. -Please don't put the probe pen for a long time in the soil (no more than one hour), otherwise it will damage the pen. -Don't use the measuring pen near the magnetic material and away from other metal objects. -Don't hold the metal part of the measuring pen by hand. Fingerprints have grease that reduces the accuracy of their measurements. -Don't try to remove the metal tip of the tester. If the tip becomes loose, tighten it clockwise.

Q: Can this be left permanently in a potted plant? Or must it be inserted and then removed each time I want to take a measurement?

It's not entirely accurate to say that it will "melt," but not far off. This device has no battery to insert, but the tip is of a different metal from the long sleeve. Likely the sleeve is copper or brass (a copper alloy), and the tip is probably zinc. When placed in moist soil, the two metals form a difference in electrical potential, essentially a battery. The electrical potential will corrode, dissolving the zinc tip over time. The same mechanism is used in ships, rocks, and bridges: they attach replaceable zinc electrodes to the steel, to make the zinc corrode instead of the steel. If you leave this in the soil, the corroding zinc from the tip will be electrodeposited on the sleeve, reducing the electrical potential, and eventually making the current stop flowing. You will then have to rub the zinc off the sleeve to make the meter work again. Over time the zinc tip would disappear. So, the answer is NO, you can't leave it place. You should get a reading, then remove it from the soil and wipe it clean and dry each time. ...and now you know WHY you have to do it.

Q: Can I use one to take readings on all my plants without having to leave it in

You have to insert it in the plant soil and it will give you the reading right away. You then can take it out and go to the next plant to get a reading. You only leave it long enough to get the reading then take it out. Do not leave it in the soil all the time. That's the way I use it.

Product ID: 195966244

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Details

Colour
Green
Brand
Dr.meter
Product dimensions
10.2W x 4.1H
Item weight
0.17 Pounds
Battery description
No batteries

🌱Single probe, root-friendly

📏10-scale precision readout

🔋No batteries required

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Description

🌿 Water smarter, not harder—never guess your garden’s thirst again!

ROOT SAFE DESIGN - Single probe technology ensures minimal disturbance to delicate plant roots.
COMPACT PORTABLE - Lightweight and easy to carry, perfect for garden, farm, lawn, or indoor plants.
USER FRIENDLY INTERFACE - No expertise required—clear red, green, and blue indicators make soil care effortless.
ECO FRIENDLY HASSLE FREE - Zero batteries or electricity needed—just plug in and know exactly when to water.
PRECISION AT YOUR FINGERTIPS - 10-scale color-coded meter for instant, foolproof soil moisture readings.

The Dr.meter S10 Soil Moisture Sensor Meter is a compact, battery-free hygrometer designed for precise soil moisture measurement. Featuring a 10-scale color-coded display and a gentle single probe, it offers an easy, eco-friendly way to optimize watering for gardens, farms, lawns, and indoor plants—helping you keep your greenery thriving with zero guesswork.

Specifications

Product Dimensions	33.02 x 10.16 x 4.06 cm; 77.11 g
Part number	S10-V
Material type	ABS
Power source type	Manual
Manufacturer	Dr.meter
Item model number	S10
ASIN	B00PTLGKSQ

Have a Question? See What Others Asked

Why it still reads dry even when I just watered my plant?

Can I put this item into the water to test the accuracy?

Can this be left permanently in a potted plant? Or must it be inserted and then removed each time I want to take a measurement?

Can I use one to take readings on all my plants without having to leave it in

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