{"product_id":"humidity-detection-sensor-module-hr202","title":"Humidity Detection Sensor Module - HR202","description":"\u003cp data-start=\"69\" data-end=\"548\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe HR202 Humidity Detection Sensor Module is a compact resistive humidity sensing module designed for detecting changes in relative humidity (RH) and providing a threshold-based output for monitoring and control applications. The module uses an HR202 resistive humidity sensor together with an LM393 voltage comparator, allowing it to detect when environmental humidity rises above or falls below an adjustable preset level. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"550\" data-end=\"1066\"\u003eThe HR202 sensing element changes its impedance according to the moisture content of the surrounding air. The onboard comparator circuit compares the sensor signal against the threshold set using the adjustable potentiometer and provides a digital HIGH\/LOW switching output. This makes the module particularly useful for humidity alarms, ventilation control, dehumidifier control, storage monitoring, and other applications where a humidity threshold needs to trigger an action. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1068\" data-end=\"1356\"\u003eThe module typically operates from 3.3V to 5V DC and covers a nominal humidity sensing range of approximately 20% RH to 95% RH. Common 3-pin versions provide a digital output, while some 4-pin variants provide both analog and digital outputs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1358\" data-end=\"1607\"\u003eWith its compact size, adjustable sensitivity, onboard power and output indicators, and simple microcontroller interface, the HR202 module is suitable for Arduino, ESP32, STM32, Raspberry Pi Pico, RP2040, PIC, AVR, and other digital control systems.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"etycth\" data-start=\"1614\" data-end=\"1631\" class=\"PDq2pG_selectionAnchorContainer\"\u003eKey Features\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-start=\"1633\" data-end=\"2423\"\u003e\n\u003cli data-section-id=\"1ndwtp0\" data-start=\"1633\" data-end=\"1679\"\u003eBased on the HR202 resistive humidity sensor\u003c\/li\u003e\n\u003cli data-section-id=\"hsncez\" data-start=\"1680\" data-end=\"1732\"\u003eDetects changes in environmental relative humidity\u003c\/li\u003e\n\u003cli data-section-id=\"1lfbf1n\" data-start=\"1733\" data-end=\"1767\"\u003eLM393 voltage comparator circuit\u003c\/li\u003e\n\u003cli data-section-id=\"1jbj126\" data-start=\"1768\" data-end=\"1809\"\u003eAdjustable humidity detection threshold\u003c\/li\u003e\n\u003cli data-section-id=\"mrkrpv\" data-start=\"1810\" data-end=\"1860\"\u003eOnboard potentiometer for sensitivity adjustment\u003c\/li\u003e\n\u003cli data-section-id=\"1pqe6ve\" data-start=\"1861\" data-end=\"1896\"\u003eDigital HIGH\/LOW switching output\u003c\/li\u003e\n\u003cli data-section-id=\"10scnyn\" data-start=\"1897\" data-end=\"1946\"\u003eAnalog output available on some module variants\u003c\/li\u003e\n\u003cli data-section-id=\"1w6rf2e\" data-start=\"1947\" data-end=\"1985\"\u003eOperating voltage from 3.3V to 5V DC\u003c\/li\u003e\n\u003cli data-section-id=\"1yoojmn\" data-start=\"1986\" data-end=\"2038\"\u003eNominal humidity sensing range of 20% RH to 95% RH\u003c\/li\u003e\n\u003cli data-section-id=\"jhmxae\" data-start=\"2039\" data-end=\"2062\"\u003eLow power consumption\u003c\/li\u003e\n\u003cli data-section-id=\"49rfyz\" data-start=\"2063\" data-end=\"2084\"\u003ePower indicator LED\u003c\/li\u003e\n\u003cli data-section-id=\"dwi8fp\" data-start=\"2085\" data-end=\"2122\"\u003eDigital output status indicator LED\u003c\/li\u003e\n\u003cli data-section-id=\"x3fj13\" data-start=\"2123\" data-end=\"2164\"\u003eClean comparator-based switching signal\u003c\/li\u003e\n\u003cli data-section-id=\"1a7khcp\" data-start=\"2165\" data-end=\"2201\"\u003eCompact and lightweight PCB design\u003c\/li\u003e\n\u003cli data-section-id=\"k6d9wi\" data-start=\"2202\" data-end=\"2239\"\u003eMounting hole for easy installation\u003c\/li\u003e\n\u003cli data-section-id=\"1puken2\" data-start=\"2240\" data-end=\"2279\"\u003eSimple connection to microcontrollers\u003c\/li\u003e\n\u003cli data-section-id=\"16z0pwv\" data-start=\"2280\" data-end=\"2320\"\u003eSuitable for humidity-triggered alarms\u003c\/li\u003e\n\u003cli data-section-id=\"wmwshi\" data-start=\"2321\" data-end=\"2374\"\u003eUseful for ventilation and dehumidification control\u003c\/li\u003e\n\u003cli data-section-id=\"9zwtdc\" data-start=\"2375\" data-end=\"2423\"\u003eSuitable for environmental monitoring projects\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Roboracter","offers":[{"title":"Default Title","offer_id":46823174111286,"sku":"EPULDPIDQQ","price":74.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/0731\/2694\/files\/HR202HumidityDetectionSensorModule-1.png?v=1783543671","url":"https:\/\/roboracter.in\/products\/humidity-detection-sensor-module-hr202","provider":"Roboracter","version":"1.0","type":"link"}