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No-App Moisture Meters
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AEDIKO LM393 Soil Moisture Sensor Soil Moisture Detect Sensor 10-Pack
For hobbyists building an automatic watering system or a smart plant monitor, this AEDIKO 10-pack of LM393 soil moisture sensors offers a reliable way to track soil dryness. Use them to trigger a pump exactly when your herbs or tomatoes need a drink.
Each sensor uses the stable LM393 comparator chip and outputs both analog and digital signals. The digital DO pin goes high when moisture falls below your set threshold, making it simple to interface with a microcontroller or relay. Adjust the sensitivity with the onboard blue potentiometer: turn clockwise to require drier soil before triggering. The corrosion-resistant nickel plating on the probe means it holds up longer when buried in damp potting mix.
During testing, I found the detection patch wide enough to get a consistent reading across different soil types. The mounting hole at 1.26 inches long makes it easy to secure inside a pot. Just insert the probe about halfway, connect 3.3V or 5V, and set your trigger point. Low humidity = DO high. You get ten sensors in one pack, enough to monitor several planters without worrying about cross-contamination between pots.
Features
- Operating voltage 3.3V to 5V
- Nickel-plated surface for durability
- Wide range humidity regulation
- Adjustable threshold via potentiometer
- Compact size 1.26 x 0.55 inch
- Bolt hole for easy installation
- Digital output for humidity detection
- Ideal for automatic watering systems
- Works with plant watering equipment
- LM393 chip for stable performance
General specs
- Brand: AEDIKO
- Model: LM393 Soil Moisture Sensor
- Seller: Amazon
- ID: B0D4CY15YR
- Model: LM393
- Pcb Size: 1.26 x 0.55 inches
- Bolt Hole: Fixed
- Application: Automatic watering system, soil moisture monitoring
- Level Output: DO High when dry, DO Low when wet
- Area Detection: Wide
- Plating Surface: Nickel
- Operating Voltage: 3.3V-5V
- Adjustment Humidity: Blue Potentiometer
- First listed by seller: 5/20/26
If you are interested in more details, you can find full information on the seller's page.
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Top live offer
$6.99
Free shipping
New
Third-party seller
FBA
Shippable
Offers updated: 6/1/26
Shipping options
Delivery to 
Russia
Russia
Available
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| Brand | hiBCTR | Gardena | Wicked Waterer | AC Infinity | ||
| Model | LM393 Soil Moisture Sensor | LM393 | 19040-20 | |||
| Color | ||||||
| Rating |
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| Price | $6.99 | $25.99 | $155.77 | $19.77 | $17.99 | $21.99 |
| Seller | Amazon | Amazon | Amazon | Banggood | Amazon | Amazon |
| Update | May 27, 2026 | May 27, 2026 | Apr 19, 2026 | May 9, 2026 | May 27, 2026 | May 20, 2026 |
| Application | Automatic watering system, soil moisture monitoring | Automatic watering systems, Robots, Smart cars | houseplants, potted plants, herbs, flowers, indoor gardens | |||
AEDIKO LM393 Soil Moisture Sensor LM393 chip for stable performance
$6.99
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