<p><b>1. <a href="https://wiki.dfrobot.com/A01NYUB%20Waterproof%20Ultrasonic%20Sensor%20SKU:%20SEN0313" target="_blank">https://wiki.dfrobot.com/A01NYUB%20Waterproof%20Ultrasonic%20Sensor%20SKU:%20SEN0313</a></b></p>
<p><b>&nbsp;</b></p>
<p><b>2. <a href="https://wiki.dfrobot.com/URM08-RS485_Waterproof_Sonar_Range_Finder_SKU_SEN0246" target="_blank">https://wiki.dfrobot.com/URM08-RS485_Waterproof_Sonar_Range_Finder_SKU_SEN0246</a>&nbsp;</b></p>
<p><b>&nbsp;</b></p>
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<div class="productInfo" style="box-sizing: border-box; padding: 0px 15px; color: #333333; font-family: hansancn; font-size: 14px; background-color: #ffffff;">
   <h1 style="box-sizing: border-box; margin: 20px 0px 10px; font-size: 36px; font-family: inherit; line-height: 1.1; color: #ffffff; background: rgb(237, 106, 1); padding: 5px;">Sensor SKU: SEN0313</h1>
   <b style="box-sizing: border-box; font-size: 20px; color: #000000; border-bottom: 1px solid rgb(237, 106, 1); padding-bottom: 5px;"></b></div>
<article class="panel-body markdown-body" id="top" style="box-sizing: border-box; padding: 15px; text-size-adjust: 100%; line-height: 1.5; overflow-wrap: break-word; background-color: #ffffff;">
   <p style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-bottom: 16px;"><a href="https://www.dfrobot.com/product-1918.html" style="box-sizing: border-box; background-color: transparent; color: #0366d6; text-decoration-line: none;" target="_blank"><img src="https://github.com/Frances9/WikiImage/blob/master/SEN0313.jpg?raw=true" width="300" hegiht="" align="right/" style="box-sizing: content-box; border: 0px none; vertical-align: middle; max-width: 100%;" /></a></p>
   <h2 id="target_0" style="color: inherit; font-family: inherit; font-size: 16px; box-sizing: border-box; line-height: 1.25; margin-top: -60px; margin-bottom: 16px; padding-bottom: 0.3em; border-bottom: 1px solid rgb(234, 236, 239); padding-top: 60px;">Introduction</h2>
   <p style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-bottom: 16px;">Ultrasonic distance sensor determines the distance to a target by measuring time lapses between the sending and receiving of the ultrasonic pulse. A01NYUB is an waterproof ultrasoinic sensor module with 7.5m effective ranging distance. It is compatible with 3.3V~5V device like Arduino, Raspberry Pi, etc. The average current of A01NYUB is only 15mA so it can be powered by most controllers' IO port.</p>
   <p style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-bottom: 16px;">The ultrasonic sensor adopts closed probe of transmitter &amp; receiver, waterproof and dustproof, which could be well suitable for harsh and moist measuring environment. It reserves 2.54-4P interface and adopts UART communication. ME007YS ultrasonic sensor has experienced long-term test and constant optimization so it can offer a pretty fast response time, high stability and sensitivity, and low power consumption.</p>
   <p style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-bottom: 16px;">Use the sensor with Arduino controller to build up your projects, such as backing car annunciator, obstacle avoidance robot, object approaching detection etc.</p>
   <h2 id="target_1" style="color: inherit; font-family: inherit; font-size: 16px; box-sizing: border-box; line-height: 1.25; margin-top: -60px; margin-bottom: 16px; padding-bottom: 0.3em; border-bottom: 1px solid rgb(234, 236, 239); padding-top: 60px;">Specification</h2>
   <ul style="box-sizing: border-box; margin-top: 0px; margin-bottom: 16px; padding-left: 2em;">
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box;">Operating Voltage: 3.3V-5v</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Average Current: ≤15mA</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Blind Zone Distance: 0-28cm</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Ranging Distance for Flat Object: 28-750cm</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Output: UART</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Response Time: 100ms</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Probe Center Frequency: 40K±1.0K</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Operating Temperature: -15~60℃</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Storage Temperature: -25~80℃</li>
      <li style="color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; box-sizing: border-box; margin-top: 0.25em;">Protection Rate: IP67</li>
      </ul>
   <p><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol"></font></p>
   <div class="productInfo" style="box-sizing: border-box; padding: 0px 15px; color: #333333; font-family: hansancn; font-size: 14px;">&nbsp;</div>
   <div class="productInfo" style="box-sizing: border-box; padding: 0px 15px; color: #333333; font-family: hansancn; font-size: 14px;"><b style="box-sizing: border-box; font-size: 20px; color: #000000; border-bottom: 1px solid rgb(237, 106, 1); padding-bottom: 5px;"><a href="https://www.dfrobot.com/product-1903.html" target="_blank" style="box-sizing: border-box; background-color: transparent; color: #000000; text-decoration-line: none;">SKU:SEN0246</a></b></div>
   <article class="panel-body markdown-body" id="top" style="box-sizing: border-box; padding: 15px; text-size-adjust: 100%; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;; font-size: 16px; line-height: 1.5; overflow-wrap: break-word;">
      <p style="box-sizing: border-box; margin-bottom: 16px;"><a href="https://www.dfrobot.com/product-1903.html" style="box-sizing: border-box; background-color: transparent; color: #0366d6; text-decoration-line: none;" target="_blank"><img src="https://github.com/Frances9/WikiImage/blob/master/300px-SEN0246-detail-002.jpg?raw=true" width="300" height="" align="right/" style="box-sizing: content-box; border: 0px none; vertical-align: middle; max-width: 100%;" /></a></p>
      <h2 id="target_0" style="box-sizing: border-box; font-family: inherit; line-height: 1.25; color: inherit; margin-top: -60px; margin-bottom: 16px; padding-bottom: 0.3em; border-bottom: 1px solid rgb(234, 236, 239); padding-top: 60px;">Introduction</h2>
      <p style="box-sizing: border-box; margin-bottom: 16px;">What is an ultrasonic distance sensor?</p>
      <p style="box-sizing: border-box; margin-bottom: 16px;">Our ultrasonic distance sensor is a ranging directional sensor equipped with an IC chip. The distance from the sensor to an obstacle can be calculated by the time difference between sending an ultrasonic signal and receiving that reflected sound. Ultrasonic sensors are widely applied to various industries and robot control areas, and offer convenient control and high efficiency in real time data feedback.</p>
      <p style="box-sizing: border-box; margin-bottom: 16px;">URM08-RS485 waterproof sonar range finder from DFRobot is an ultrasonic distance sensor designed for professional industry controls and robotic controls. The sensor is equipped with distance and temperature measurement functions. Additionaly, the built-in temperature compensation greatly enhances the accuracy of distance measurement.</p>
      <p style="box-sizing: border-box; margin-bottom: 16px;">The internal elements of the sensor are completely sealed. The sensor adopts all metal outer case, which makes it able to protect against dust, water and corrosion. In the end the sensor has high standard device selections, a much narrower blind area and wider distance detection range.</p>
      <p style="box-sizing: border-box; margin-bottom: 16px;">URM08-RS485 employs RS485 communication interface, and supports modbus protocol and cascaded control functions. This ultrasonic distance sensor is very suitable for a liquid level monitoring system or obstacle avoidance applications.</p>
      <h2 id="target_1" style="box-sizing: border-box; font-family: inherit; line-height: 1.25; color: inherit; margin-top: -60px; margin-bottom: 16px; padding-bottom: 0.3em; border-bottom: 1px solid rgb(234, 236, 239); padding-top: 60px;">Specification</h2>
      <p style="box-sizing: border-box; margin-bottom: 16px;"><img src="https://raw.githubusercontent.com/DFRobot/DFRobotMediaWikiImage/master/Image/URM08-RS485_Beam_Angle-DFRobot.jpg" alt="URM08-RS485 Beam Angle-DFRobot" title="URM08-RS485 Beam Angle-DFRobot" style="box-sizing: content-box; border: 0px none; vertical-align: middle; max-width: 100%;" /></p>
      <ul style="box-sizing: border-box; margin-top: 0px; margin-bottom: 16px; padding-left: 2em;">
         <li style="box-sizing: border-box;">Operating Voltage: 6V-12V DC</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Operating Current: 250 mA</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Effective Range: 35~550 cm</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Distance Resolution: 1cm</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Distance Accuracy: ±1%</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Temperature Resolution: 0.1°C</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Temperature Accuracy: ±1°C</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Measurement Period: 70ms</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Operating Temperature Range: -10°C~+70°C</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Operating Humidity Range: RH &lt;75%</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Acoustic Frequency: 38 ~ 42KHz</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Beam Angle: ≤60 °C</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Protection Level: IP67</li>
         <li style="box-sizing: border-box; margin-top: 0.25em;">Interface: RS485</li>
         </ul>
      </article>
   </article>