The soil moisture sensor is commonly used in smart agriculture or other garden automation projects to measure the moisture content present in the soil. It consists of 4 pins in which two pins, Vcc and Gnd are connected to supply voltage. The remaining two pins are digital (D0) and analog (A0) are the output pins. When the moisture content present in the soil goes beyond the threshold level, the output of the digital pin (D0) will go low (the output of the digital pin is either logic 0 or 1). The threshold value of the sensor module can be set by varying the onboard potentiometer. The analog output pin can be used to calculate the approximate level of moisture content present in the soil.
When purchased, a single unit of soil moisture sensor module will be shipped with the sensor probes and the measurement module. The sensor probe will be dipped in the soil and connected to the measurement module. The measurement module will compare the measured value with the set threshold value (can be set using 10k pot) using the LM393 OP-Amp comparator and provide output on the digital pin. Both the sensor probe and measurement module is shown below.
Specifications of the Soil Moisture Sensor
- Operating voltage (Vcc): 3.3V to 5V
- Analog Output voltage: 0 to 4.2V@ Vcc = 5V
- Digital Output Voltage: 0V or 5V @ Vcc=5v
- Current consumption: 32mA
Because of the presence of the onboard Lm393 comparator circuit, you can also directly use the soil moisture sensor in your project without connecting a microcontroller unit (MCU) to it. When the moisture content of the soil is higher than the threshold value, the digital output of the moisture sensor is logic 0 (0V). The output from the digital pin can be used to drive an LED or a buzzer circuit.
You can also connect the Digital and Analog Output pins with a microcontroller like Arduino to built measure and monitor the soil moisture sensor and build interesting projects.
Dimensions of the Soil Moisture Sensor
Additional Resources
Returns Policy
Due to the type of products we sell, we accept limited returns. Below are the conditions where we can accept a return request.
1. Damaged During Shipment
If you receive a product damaged during shipment, please notify us within the 3 days of you receive the product, supported by the proper pictures and description. Once our support team accept the return, we will provide a replacement or a complete refund including the return shipping cost.2. Wrong Item Shipped
If your item looks different from what is shown in the image on our website, we will take the item back and provide a refund or replacement as per your choice.
Limitation of Returns
We don't accept the returns for the products damanged by improper use of the product. Moreover we don't accept the return, if the ordered product is not fit for any specific application. Please read the product specifications and datasheet before selecting and ordering a product. Returns are accepted only with 3 days from the date of delivery.Shipping
We ship to all over India with free shipping on all prepaid orders above 500. For Cash on Delivery orders INR 80 will be charged for orders below INR 599 and INR 30 will be charged for the orders above 599. Please contact to our support team at support@quartzcomponents.com for any question related to shipping.
Please note that the Minimum Order Value is INR 500 for COD orders.