Moisture Sensor Probe

  • 28092: Moisture Sensor Probe - front view
  • 28092: Moisture Sensor Probe - back view with cable
  • 28092: Moisture Sensor Probe - back view
Product ID: 28092
In Stock: 56


The Moisture Sensor Probe is a fork-like physical package that easily inserts into soil or other soft, non-corrosive media. This sensor uses conductivity to detect the amount of moisture between the probes. The likely use of this sensor is in potted plants, micro-farming research and with some non-soil environments.

The single analog output may be directly connected to the Propeller Activity Board 4-channel A/D converter or easily interfaced with the MCP3002 A/D with a FLiP Multicore Microcontroller.

The quickest way to connect these to your microcontroller is using the Parallax 3-pin cables, available in a set or as individual lengths.


  • 1.5 inch detection depth reaches below the top layer of media
  • 2 to 5 volt analog output is easy to read by many controllers or A/D converters
  • 9 inch (22 cm) 3-pin female-female extension cable included

Application Ideas

  • Flower and plant soil moisture measurement
  • Automatic watering system — combine with the Mini Liquid Level Sensor for a watering system
  • Non-soil applications are possible with sponges, damp paper towels and other materials


Key Specifications

  • Detection depth: 1.5 in (38 mm)
  • Power: 2.0 V to 5.0 V
  • Dimensions: 0.8 x 2.0 in (20 x 51 mm)
  • Mounting holes size: 0.8 in (2.0 mm)

Downloads & Documentation

Product Specific Downloads
Download Details More Info
Moisture Sensor Probe User Manual - 62.27 KB | updated: 11 Sep 2019 - 1:25 pm

Additional Resources