Humidity Sensor with Relay 24V

Description

24 V Humidity Sensor with Relay

Purpose:
Humidity test, humidity sensor, humidity test, with relay output, direct control of equipment related to power supply

Module Features:
1, using a high-quality HR202 humidity sensor;
2, the comparator outputs directly control the relays or other devices connected to 220 V AC;
3, adjust the threshold of detection for temperature distribution bits
4, the sensor interface can be installed by pin, in addition to the humidity sensor with cables;
5, external card dimensions: 50x26mm, thickness 19mm, 3mm screws with four holes for easy installation

Electrical Parameters:
Supply Voltage: 5 V DC or 12 V DC (default 5 V, please leave a message if 12 V is required)
Current: more than 150 mA
Maximum load: 250 V 10 A AC or 30 V 10 A DC, this power supply can be used for small

Module for use:
1, the most sensitive humidity sensor to ambient humidity is generally used to detect ambient humidity;
2, when the ambient humidity module exceeds the set threshold, the relay, normally open and connected to the public, when the external humidity is below the set threshold, the relay is off, the common terminal and normally closed terminal are connected;
3, common, normally open, three normally closed ports are equivalent to a double pole switch, relay coil power supply, often starting with common terminal conduction, absence of electricity, common terminal and normally closed terminal conduction;

When the ambient temperature is higher than the set humidity, relay, light bulb, below the set humidity, relay off, the light does not turn on (the icon indicates only that wiring method) to share power connections.

Tutorial: How to Use Humidity Sensor with 24V Relay

The humidity sensor with 24V relay is ideal for monitoring and automatically controlling humidity in domestic or industrial environments. It is perfect for beginners who want to create an intelligent irrigation system.

What you need

• Arduino Uno
• Data Connection
• 24V Relay
• 5V Power Supply

Steps

1. Connect the sensor to the digital pin of the Arduino (check the datasheet for specific pins).
2. Power the relay with 24V voltage.
3. Connect the system power supply to be controlled to the relay.
4. Download and upload the provided Arduino sketch.
5. Configure the digital pins in the code to match the physical connections.
6. Test the sensor by verifying that the humidity reading is consistent with the environment.
7. Program the relay to activate when the humidity is too low (check the datasheet for operating limits).
8. Verify that the system activates correctly and adjust the humidity threshold if necessary.

Example code

const int umiditaPin = 2; // Verifica sul datasheet
const int relePin = 3;
void setup() {
pinMode(umiditaPin, INPUT);
pinMode(relePin, OUTPUT);
}
void loop() {
int valUmido = digitalRead(umiditaPin);
if (valUmido == LOW) {
digitalWrite(relePin, HIGH); // Attiva il relè
} else {
digitalWrite(relePin, LOW); // Disattiva il relè
}
delay(1000);}

Mini project

Create an automatic irrigation system for potted plants based on soil moisture. Connect a water pump to the relay and program the Arduino to spray water when the humidity is too low.

Common mistakes

• Incorrect connection between Arduino and sensor
• Power supply voltage not conforming to the relay specifications
• Humidity threshold improperly configured in the code

Recommended accessories

• Arduino Uno R3
• 24V Relay with Arduino Mounting Base
• Additional Humidity Sensors
• Water Pumps Compatible with the Relay

Frequently asked questions

Does the sensor work outdoors as well?
Check the datasheet for the environmental specifications of the sensor.

How can I adjust the humidity threshold?
Modify the trigger value in the Arduino code.

Can the relay handle loads up to 24V?
Check the relay specifications on the datasheet.