{"product_id":"jsn-sr04t-aj-sr04m-waterproof-ultrasonic-distance-sensor-arduino","title":"JSN-SR04T \/ AJ-SR04M Waterproof Ultrasonic Distance Sensor — Integrated Probe, Arduino","description":"\u003ch2\u003eJSN-SR04T \/ AJ-SR04M — Waterproof Ultrasonic Distance Sensor\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eJSN-SR04T\u003c\/strong\u003e (also known as \u003cstrong\u003eAJ-SR04M\u003c\/strong\u003e) is a \u003cstrong\u003ewaterproof ultrasonic distance sensor\u003c\/strong\u003e with an \u003cstrong\u003eintegrated probe\u003c\/strong\u003e connected via cable to a control board. Unlike the HC-SR04 open-air sensor, the JSN-SR04T's transducer is fully sealed and suitable for \u003cstrong\u003eoutdoor, wet, and liquid level measurement\u003c\/strong\u003e applications. Measuring range: \u003cstrong\u003e20cm to 600cm\u003c\/strong\u003e with ±1cm accuracy.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJSN-SR04T \/ AJ-SR04M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasuring Range\u003c\/td\u003e\n\u003ctd\u003e20cm – 600cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±1cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeam Angle\u003c\/td\u003e\n\u003ctd\u003e~75°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;8mA (standby), 30mA (active)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Modes\u003c\/td\u003e\n\u003ctd\u003eTrigger\/Echo (HC-SR04 compatible) or UART\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUART Baud Rate\u003c\/td\u003e\n\u003ctd\u003e9600 bps (UART mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Waterproof Rating\u003c\/td\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Cable Length\u003c\/td\u003e\n\u003ctd\u003e~2.5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eWhy Choose JSN-SR04T?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eIP67 waterproof probe\u003c\/strong\u003e — suitable for outdoor, rain, and liquid surface measurement\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eHC-SR04 compatible mode\u003c\/strong\u003e — drop-in replacement for existing trigger\/echo code\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eUART mode\u003c\/strong\u003e — digital distance output, immune to PWM timing errors\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e600cm range\u003c\/strong\u003e — 3× the range of standard HC-SR04 (200cm)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e2.5m probe cable\u003c\/strong\u003e — mount control board away from wet environment\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eCompatible With \/ Works With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino\u003c\/strong\u003e UNO\/Nano\/Mega (trigger\/echo mode, same as HC-SR04)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESP32\u003c\/strong\u003e \/ ESP8266 (trigger\/echo or UART via Serial2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaspberry Pi\u003c\/strong\u003e (UART mode via GPIO serial port)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTM32\u003c\/strong\u003e (UART or timer input capture mode)\u003c\/li\u003e\n\u003cli\u003eNewPing library (Arduino), ultrasonic library (MicroPython)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Tank Level Monitoring\u003c\/strong\u003e — measure water level in cisterns, tanks, and reservoirs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor Obstacle Detection\u003c\/strong\u003e — robot navigation in rain or dusty environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParking Sensor\u003c\/strong\u003e — vehicle proximity detection in outdoor parking systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlood Detection\u003c\/strong\u003e — water level alarm for basement or drainage monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Level Sensing\u003c\/strong\u003e — non-contact liquid level in industrial tanks\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eWiring (Trigger\/Echo Mode)\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eJSN-SR04T Pin\u003c\/th\u003e\n\u003cth\u003eArduino Pin\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrig\u003c\/td\u003e\n\u003ctd\u003eD9 (or any digital pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEcho\u003c\/td\u003e\n\u003ctd\u003eD10 (or any digital pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Can JSN-SR04T replace HC-SR04 in existing Arduino code?\u003c\/strong\u003e\u003cbr\u003eA: Yes, in trigger\/echo mode. The wiring and timing are identical. Note the minimum range is 20cm (vs 2cm for HC-SR04) — objects closer than 20cm will not be detected.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I switch between trigger\/echo and UART mode?\u003c\/strong\u003e\u003cbr\u003eA: The mode is selected by a resistor on the control board (R19). Check the board markings: some modules have a mode selection jumper or solder bridge. Refer to the datasheet for your specific board revision.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is the entire sensor waterproof, or just the probe?\u003c\/strong\u003e\u003cbr\u003eA: Only the \u003cstrong\u003eprobe (transducer)\u003c\/strong\u003e is IP67 waterproof. The \u003cstrong\u003econtrol board\u003c\/strong\u003e is not waterproof and must be kept dry. Mount the probe in the wet area and route the cable to a dry enclosure for the control board.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1× JSN-SR04T \/ AJ-SR04M Waterproof Ultrasonic Distance Sensor (probe + control board + cable)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"JSN-SR04T line","offer_id":46991481667819,"sku":"14:366#JSN-SR04T line","price":8.6,"currency_code":"USD","in_stock":true},{"title":"1set","offer_id":46991481700587,"sku":"14:365458#1set","price":16.04,"currency_code":"USD","in_stock":true},{"title":"JSN-SR04T Module","offer_id":46991481733355,"sku":"14:10#JSN-SR04T Module","price":9.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/jsn-sr04t-waterproof-ultrasonic-sensor.webp?v=1761546975","url":"https:\/\/keszoox.com\/products\/jsn-sr04t-aj-sr04m-waterproof-ultrasonic-distance-sensor-arduino","provider":"Keszoox","version":"1.0","type":"link"}