The new soil moisture sensor uses Immersion Gold which protects the nickel from oxidation. Electroless nickel immersion gold (ENIG)  has several advantages over more conventional (and cheaper) surface platings such as HASL (solder), including excellent surface planarity (particularly helpful for PCB's with large BGA packages), good oxidation resistance, and usability for untreated contact surfaces such as membrane switches and contact points.

A soil moisture sensor can read the amount of moisture present in the soil surrounding it. It's a low tech sensor, but ideal for monitoring an urban garden, or your pet plant's water level. This is a must have tool for a connected garden!

This sensor uses the two probes to pass current through the soil, and then it reads that resistance to get the moisture level. More water makes the soil conduct electricity more easily (less resistance), while dry soil conducts electricity poorly (more resistance).

It will be helpful to remind you to water your indoor plants or to monitor the soil moisture in your garden. The IO Expansion Shield is the perfect shield to connect this sensor to the Arduino.

Specification

  • Power supply: 3.3v or 5v
  • Output voltage signal: 0~4.2v
  • Current: 35mA
  • Pin definition:
  • Analog output (Blue wire)
  • GND (Black wire)
  • Power (Red wire)
  • Size: 60x20x5mm
  • Surface finish: Immersion Gold

Parts List

Soil Moisture Sensor Immersion Gold

  • Brand: DFRobot
  • Product Code: DFR-SEN0114
  • Reward Points: 5
  • Availability: 2
  • £6.53

  • Ex Tax: £5.45
  • Price in reward points: 100

  • 5 or more £5.64

Immersible Water Pump

Immersible Water Pump

£15.42

Immersible Water Pump is an immersible pump used to water your plants, make a fountain or waterfall, ...

Qty: 1

Soil Moisture Sensor (Grove)

Soil Moisture Sensor (Grove)

£4.50

This Moisture Sensor can be used to detect the moisture of soil or judge if there is water around ...

Qty: 46

Moisture Sensor

Moisture Sensor

£4.96

Moisture Sensor

Qty: 8

Botanicalls Kit [KIT10334]

Botanicalls Kit [KIT10334]

£105.53

This kit comes with everything you need to get your plant tweeting.

Qty: 2

Soil Moisture Sensor [SEN13322]

Soil Moisture Sensor [SEN13322]

£6.53

Simple breakout for measuring the moisture in soil and similar materials

Qty: 3