{"id":6290,"date":"2026-07-29T13:04:46","date_gmt":"2026-07-29T13:04:46","guid":{"rendered":"https:\/\/plugplaykit.com\/?post_type=product&p=6290"},"modified":"2026-07-30T20:50:49","modified_gmt":"2026-07-30T20:50:49","slug":"liquid-level-sensor","status":"publish","type":"product","link":"https:\/\/plugplaykit.com\/es\/producto\/liquid-level-sensor\/","title":{"rendered":"Sensor de nivel de l\u00edquido ultras\u00f3nico sin contacto \u2013 M\u00f3dulo sensor de profundidad de tanque externo"},"content":{"rendered":"

Model Selection Guide<\/h3>\n

Please choose the corresponding output protocol model based on your controller or PLC requirements:<\/p>\n\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nSpecification<\/th>\nOutput Description<\/th>\n<\/tr>\n<\/thead>\n
DS1603L<\/strong><\/td>\nUART Serial Port<\/td>\nTTL-UART digital serial output for MCU\/Arduino\/Raspberry Pi integration.<\/td>\n<\/tr>\n
DS1603-AQ<\/strong><\/td>\nAnalog Output<\/td>\nProportional analog voltage output for analog signal collection.<\/td>\n<\/tr>\n
DS1603NF<\/strong><\/td>\nNormally Open (NO)<\/td>\nRelay output with Normally-Open contact for liquid level switch control.<\/td>\n<\/tr>\n
DS1603NFK<\/strong><\/td>\nNormally Closed (NC)<\/td>\nRelay output with Normally-Closed contact for safety\/alarm logic circuits.<\/td>\n<\/tr>\n
DS1603DA-RS485<\/strong><\/td>\nRS485 Interface<\/td>\nRS485 Modbus industrial communication for long-distance PLC\/SCADA systems.<\/td>\n<\/tr>\n
L023MPNW<\/strong><\/td>\nLow-Voltage Analog Output<\/td>\nLow-voltage version operating at 2.8V \u2013 5V power supply with analog output.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n

Non-Contact Ultrasonic Liquid Level Sensor Module (DS1603 Series)<\/h2>\n

The DS1603 Series Non-Contact Ultrasonic Liquid Level Sensor<\/strong> provides high-precision, non-invasive liquid depth detection without drilling holes or altering your container structure. Mounted directly to the bottom or outer wall of the vessel, it emits ultrasonic pulses through the container material to accurately measure real-time liquid levels.<\/p>\n

Equipped with built-in temperature compensation, it automatically adjusts measurement values according to environmental changes, making it an ideal choice for smart home automation, water tank level monitoring, and industrial liquid management.<\/p>\n

Key Features<\/h3>\n
    \n
  • Non-Invasive Measurement:<\/strong> Attaches externally to the tank bottom. Zero contact with liquid ensures anti-corrosion, clean, and leak-free operation.<\/li>\n
  • Built-in Temperature Compensation:<\/strong> Ensures stable accuracy across varying temperature environments.<\/li>\n
  • Real-Time Continuous Tracking:<\/strong> Supports dynamic tracking. No system restart is required when filling an empty tank.<\/li>\n
  • Multiple Output Interfaces:<\/strong> Available in UART<\/strong> (DS1603L V1.0), RS485<\/strong> (DS1603DA V1.0), and Analog Voltage<\/strong> (DS1603AQ V1.0) versions for flexible MCU and PLC integration.<\/li>\n<\/ul>\n
    \n

    <\/p>\n

    \u26a0\ufe0f Critical Operating & Tank Compatibility Requirements<\/h3>\n

    To ensure reliable ultrasound penetration and accurate measurements, please verify that your application meets all of the following conditions prior to installation:<\/em><\/p>\n

      \n
    1. Container Material & Thickness:<\/strong> Must be an integrated\/seamless metal container wall with a thickness between 0.5 mm and 5.0 mm<\/strong>.<\/li>\n
    2. Surface Condition:<\/strong> The probe mounting area on the container wall must be free of paint, rust, coating, or heavy oxide layers (clean metal surface required).<\/li>\n
    3. Container Size \/ Pipe Diameter:<\/strong>\n
        \n
      • For tanks\/containers: Outer diameter must not exceed 2 meters<\/strong>.<\/li>\n
      • For pipes: Outer diameter must be larger than 15 cm<\/strong>.<\/li>\n<\/ul>\n<\/li>\n
      • Liquid Purity:<\/strong> The measured liquid should be clear with low impurity\/sediment levels to prevent sound wave scattering.<\/li>\n
      • Internal Obstructions:<\/strong> The interior acoustic path must be unobstructed (hollow) and contain liquid only (no internal baffles, mixers, or bubbles).<\/li>\n
      • Operating Temperature:<\/strong> Maximum liquid\/vessel temperature must not exceed 60\u00b0C (140\u00b0F)<\/strong>.<\/li>\n<\/ol>\n
        \n

        <\/p>\n

        Technical Specifications<\/h3>\n\n\n\n\n\n\n\n\n\n
        Parameter<\/th>\nDS1603L V1.0<\/th>\nDS1603DA V1.0<\/th>\nDS1603AQ V1.0<\/th>\n<\/tr>\n<\/thead>\n
        Operating Voltage<\/strong><\/td>\nDC 3.3V \u2013 12V<\/td>\nDC 10V \u2013 36V<\/td>\nDC 10V \u2013 36V<\/td>\n<\/tr>\n
        Detection Range<\/strong><\/td>\n5 cm \u2013 200 cm<\/td>\n5 cm \u2013 200 cm<\/td>\n5 cm \u2013 100 cm<\/td>\n<\/tr>\n
        Output Signal<\/strong><\/td>\nUART Output<\/td>\nRS485 Output<\/td>\nAnalog Voltage Output<\/td>\n<\/tr>\n
        Measurement Accuracy<\/strong><\/td>\n\u00b1(5 + S * 0.5%) mm<\/td>\n\u00b1(5 + S * 1.0%) mm<\/td>\n\u00b1(10 + S * 1.0%) mm<\/td>\n<\/tr>\n
        Dimensions<\/strong><\/td>\nProbe Diameter: 27.7mm \u00b1 0.5mm | Height: 17mm \u00b1 1mm | Cable Length: 450mm \u00b1 10mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        * Note: S<\/strong> represents the current detected liquid level height in millimeters.<\/small><\/p>\n

        \n

        <\/p>\n

        Applications<\/h3>\n
          \n
        • Smart home appliance liquid monitoring (e.g., water dispensers, coffee machines)<\/li>\n
        • Water tank & storage container level management<\/li>\n
        • High-risk liquid level detection & automated pump control (High\/Low limit control)<\/li>\n
        • DIY electronics & industrial automation projects<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

          The DS1603 Series<\/b> is an external, non-invasive ultrasonic liquid level sensor designed for continuous depth detection without drilling holes. Featuring built-in temperature compensation and flexible signal outputs (UART, RS485, Analog Voltage), it provides high-precision liquid tracking for smart tanks and automation systems.<\/p>","protected":false},"featured_media":6280,"comment_status":"open","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"Non-Contact Ultrasonic Liquid Level Sensor - External Tank Depth Sensor Module","_seopress_titles_desc":"Shop non-contact ultrasonic liquid level sensors (DS1603 Series). High-precision external depth monitoring for 0.5-5mm metal tanks without drilling. UART, RS485 & Analog outputs available. Order online at 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