{"product_id":"hr202-humidity-sensor-relay-module-dc-5v-12v-1-channel","title":"HR202 Humidity Sensor Relay Module DC 5V 12V 1-Channel","description":"\n\u003ch2\u003eBS HR202 Humidity Sensor Switch Relay Module – DC 5V \/ 12V, 1-Channel Control Board\u003c\/h2\u003e\n\u003cp\u003eTake precise control of your humidity-dependent systems with the \u003cstrong\u003eBS HR202 Humidity Sensor Switch Relay Module\u003c\/strong\u003e. 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 \u003cstrong\u003eDC 5V or DC 12V\u003c\/strong\u003e, it fits seamlessly into a wide range of circuits and enclosures.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Voltage Support:\u003c\/strong\u003e Compatible with DC 5V and DC 12V power supplies for flexible integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-Channel Relay Output:\u003c\/strong\u003e Switch a single load on or off based on detected humidity levels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHR202 Humidity Sensing Element:\u003c\/strong\u003e Reliable and responsive humidity detection for accurate switching.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Functions from -40°C to +85°C, suitable for demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e 150mA dissipation keeps your project efficient.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMD Package:\u003c\/strong\u003e Compact surface-mount design for space-saving builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable Threshold:\u003c\/strong\u003e Set the humidity trigger point to suit your specific application.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBS HR202\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V \/ 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDissipation Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSMD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY home automation and smart environment control\u003c\/li\u003e\n  \u003cli\u003eGreenhouse and grow-room humidity management\u003c\/li\u003e\n  \u003cli\u003eServer room and electronics cabinet monitoring\u003c\/li\u003e\n  \u003cli\u003eArduino \/ Raspberry Pi and microcontroller projects\u003c\/li\u003e\n  \u003cli\u003eVentilation fan control systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltages does the HR202 Humidity Sensor Relay Module support?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: How does the humidity sensor relay module work?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this module compatible with Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the operating temperature range of this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: The module is rated to operate reliably from -40°C to +85°C, making it suitable for both indoor and challenging environmental conditions.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltages does the HR202 Humidity Sensor Relay Module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"How does the humidity sensor relay module work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module uses the HR202 humidity-sensing element to continuously monitor ambient humidity. 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