HR202 Humidity Sensor Relay Module DC 5V 12V 1-Channel

BS HR202 Humidity Sensor Switch Relay Module – DC 5V / 12V, 1-Channel Control Board

Take precise control of your humidity-dependent systems with the BS HR202 Humidity Sensor Switch Relay Module. This compact, single-channel control board automatically triggers connected devices when a set humidity threshold is reached — ideal for DIY electronics, automation projects, greenhouse monitoring, server rooms, and more. Powered by either DC 5V or DC 12V, it fits seamlessly into a wide range of circuits and enclosures.

Made in Mainland China.

Key Features

• Dual Voltage Support: Compatible with DC 5V and DC 12V power supplies for flexible integration.
• 1-Channel Relay Output: Switch a single load on or off based on detected humidity levels.
• HR202 Humidity Sensing Element: Reliable and responsive humidity detection for accurate switching.
• Wide Operating Temperature: Functions from -40°C to +85°C, suitable for demanding environments.
• Low Power Consumption: 150mA dissipation keeps your project efficient.
• SMD Package: Compact surface-mount design for space-saving builds.
• Customizable Threshold: Set the humidity trigger point to suit your specific application.
• Condition: Brand new.

Specifications

Ideal Applications

• DIY home automation and smart environment control
• Greenhouse and grow-room humidity management
• Server room and electronics cabinet monitoring
• Arduino / Raspberry Pi and microcontroller projects
• Ventilation fan control systems

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Frequently Asked Questions

Q: What voltages does the HR202 Humidity Sensor Relay Module support?

A: The BS HR202 relay module supports both DC 5V and DC 12V power supplies, making it highly versatile for a wide range of electronic and automation projects.

Q: How does the humidity sensor relay module work?

A: The module uses the HR202 humidity-sensing element to continuously monitor ambient humidity. When the detected humidity crosses a user-set threshold, the onboard relay switches to either energize or de-energize a connected load — such as a fan, humidifier, or alarm — automatically.

Q: Is this module compatible with Arduino or Raspberry Pi?

A: Yes. The BS HR202 module is designed to integrate easily with popular microcontroller platforms including Arduino and Raspberry Pi, as well as other 5V or 12V control circuits commonly used in DIY electronics and automation builds.

Q: What is the operating temperature range of this relay module?

A: The module is rated to operate reliably from -40°C to +85°C, making it suitable for both indoor and challenging environmental conditions.