The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value).

In a way, the magic of a soil moisture sensor’s functionality boils down to a simple RC circuit. But of course, in practice there is a bit more to it than that. [rbaron] explains exactly how ...

Soil Moisture Measurement and Sensor Calibration Publication Trend The graph below shows the total number of publications each year in Soil Moisture Measurement and Sensor Calibration.

The circuit described here might be very simple, but it’s a very useful soil moisture tester. Two electrodes are stuck in the soil and the moisture level is shown on an LED display. The LEDs have been ...

Soil moisture sensors can help farmers save water, by letting them know when their crops actually need to be watered. An experimental new sensor could be particularly helpful, as it incorporates a ...

The soil sensor switches half of an etched PCB bowtie antenna in and out of a circuit at a frequency proportional to soil moisture.

BEAVERTON, Oregon — Vernier Science Education recently launched the Go Direct ® Soil Moisture Sensor to help high school and college-level students easily and accurately collect data during soil ...

My soil-moisture reading was in the low 700s in soil that had around 30 percent moisture (according to a comparison with a commercial soil-moisture sensor), and 661 in a drier pot.

Monnit launches its new ALTA® Soil Moisture Sensor to alert you on your mobile device or computer how much, when, and where to water your crops.

Go Direct Soil Moisture can be used wired via USB or wirelessly via Bluetooth ® wireless technology, enabling educators to choose the solution that fits best for their classroom or laboratory. The ...