Reviews for Water Probes and Sensors


Reviews For Water Probes And Sensors

These reviews for water probes and sensors list a lot of very simple, easy-to-use garden tools for determining soil moisture – some also include measurements for pH, Nitrogen, Phosphorus, and Potassium (N-P-K).

Here are some of the best options available on the market today.

Woodstream WW-100DSP Wormie The Water Sensor (Pack of 24)


Sold in a pack of 24, Wormie The Water Sensor eliminates over or under watering.  This terra cotta (clay) probe can be used in backyard gardens, raised bed gardens, and containers.

It changes color, getting lighter if the soil is too dry and turning darker if the soil is wet.

  • Your plant’s favorite pet
  • A unique decorative accent

Besides…it’s kinda cute, too…isn’t it?

I could use an adorable little Wormie The Water Sensor.


Dr.meter S30 3-in-1 Soil Moisture Meter Indoor Outdoor

Using two 20 cm probes and a light sensor, the Dr.meter S30 3-in-1 Soil Moisture Meter gives an accurate readout on 3 calibrated tables of:

  • Soil moisture – With a moisture range from 1 to 10 (1-3 = dry, 4 to 7 = normal, and 8 to 10 = wet), the meter will alert you when your plants need more water.
  • pH level – The pH level shows readings from 3.5 pH to 8 pH, and tells you whether the soil is acidic (3.5 to 6.5) or alkaline (7 to 8).
  • Sunshine – The meter also tests whether the plants are getting adequate sunshine.

No battery is needed.

Just plug it into your backyard garden or container soil.

Downside:  Readings are more accurate with clay-type soil.  The silver-tipped probes are more durable when used in soft, loamy soil.

Dr.meter will tell you a lot more than sticking your finger in the soil.

You should definitely check out the Dr.meter S30 3-in-1 Soil Moisture Meter Indoor Outdoor.


Rapitest 1818 Mini 4-in-1 Soil Tester Ph NPK Light Moisture Meter

The Rapitest 1818 Mini 4-in-1 offers the same readings as Dr.meter (i.e. Sunshine, pH, and moisture levels) plus an additional readout detailing soil fertility…to ensure that there is enough nourishment for the veggies in your garden.

Used per instructions, this tester will analyze the nitrogen, phosphorus, and potassium content in the soil and tell you if you have too little, too much…or just right.

The instructions also outline recommended actions to take in order to ensure the health and welfare of your veggies.

No batteries needed.

Downside:  The Rapitest 1818 will give you a general idea of the soil’s pH but, you have to make sure to follow the instructions.  Also, you may need use a little trick to activate the pH probe by rubbing a piece of wool across the tip of the probe.  Readings are inaccurate in hard clay soils or shallow pots such as those used for Bonsai trees because, you need to insert the probes a full 3.5 inches into the soil to get an accurate reading.

This tester is a helpful tool that every home garden enthusiast can be pleased about!

I am interested in the Rapitest Ph NPK Light Moisture Meter.

Don’t these reviews for water sensors and probes make perfect sense? 

How could one or more of these sensors help you ensure that your plants are getting enough moisture, pH, or N-P-K?  Comment below or email me:


Jim, the Lifelong Gardener

2 thoughts on “Reviews for Water Probes and Sensors

  1. Steve & Kris Reply

    I have to say, Wormie the Water Sensor grabbed my attention right away. I really need to invest in a water sensor. I keep thinking about it, but just haven’t done it. It would certainly take the guess work out of watering. I live in the desert, so we have some interesting challenges with gardening. We can grow most of the year, but you have to be careful when the weather starts to heat up. It’s amazing how quickly the soil can dry out. Thanks for this great information on water sensors. I will have to pick one up soon.

    • Jim Reply

      Yep!  A good, reliable water sensor is a smart move in any environment…but, especially in a desert.  In the heat of the day, those poor plants could face drought conditions in a matter of hours.

      Thanks, for stopping by and commenting on my water sensors and probes.  You might also want to check out the pages on pressure gauges and regulators, as well as water timers!


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