Reviews Distance Measuring Sensors

5pcs Ultrasonic Module HC-SR04 MELIFE Distance Sensor with 3pcs Mounting Bracket 2 Wire Set for Mega R3 MEGA Mega2560 Duemilanove Nano Robot XBee ZigBee

  • Parameter -- New Version Power Supply: 3.3V -- 5V DC.
  • Operating Principle: Ultrasonic HC-SR04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit..
  • HC-SR04 ultrasonic sensor module: Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning..
  • Test Distance Formula: The distance between the unit and the object is calculated by measuring the traveling time of sound and output it as the width of a TTL pulse, HC-SR04 test distance following formula -- L = 1/2 x T x C (L is the distance, T is the time between the emission and reception, and C is the sonic speed)..
  • Package Include: 5 x New Version HC-SR04 Ultrasonic Sensors, 3 x Mounting Bracket with Screws, 10 x Female-Male Dupont Cables, 10 x Female-Female Dupont Cables..
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SunFounder Ultrasonic Module HC-SR04 Distance Sensor Compatible with Arduino R3 Mega2560 Duemilanove Nano Robot Rapsberry Pi 4B 3B+, 3B, 2 Model B & 1 Model B+

  • Ultrasonic hc-sr04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit..
  • HC-SR04 Ultrasonic Sensor Distance Module: using IO trigger for at least 10us high level signal，When triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object..
  • Hc-sr04 Test Distance following formula: L = 1/2 × T × C ( L is the distance, T is the time between the emission and reception, and C is the sonic speed).
  • Package Content: 5 HC-SR04 Ultrasonic Sensors , 10 Female-Male Dupont Cables , 10 Female-Female Dupont Cables , 1 Exquisite package box.
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Garmin Forerunner 920XT Black/Blue Watch

  • VO2 MAX, RECOVERY TIME & RACE PREDICTOR2 Forerunner 920XT estimates VO2 max, recovery time and predicts your race times for several distances when....
  • RUNNING DYNAMICS1 When paired with the HRM-RunTM monitor, the Forerunner 920XT provides feedback on running form by measuring cadence, vertical....
  • METRICS THAT MATTER Record speed, distance, ascent/descent, grade and more. Pair with ANT+ compatible sensors to measure heart rate4, speed4, cadence4....
  • SMART NOTIFICATIONS3 See incoming email, text messages, call alerts, calendar reminders and more from your compatible smartphone..
  • LIVE TRACKING3 Let friends and family follow your races and training activities in real time..
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iHealth No-Touch Forehead Thermometer for Adults, Babies and Kids & iHealth Livocare Face Masks 50 Packs

  • No Touch Measuring, Just Safe and Hygienic: PT3 Built-in infrared temperature sensor, reads body temperature within 1.18 inches of the center of the forehead without physical contact..
  • 3-layers of Protection: Made with three layers of soft non-woven polypropylenes that prevent the inhalation or exhalation of respiratory droplets..
  • Tri-Point Sensors Accuracy: An ultra-sensitive infrared sensor collects more than 100 data points per second while distance and environmental sensors combine to account for other variables.
  • ensuring maximum accuracy every time temperature is taken..
  • Easy to Breathe Through: Highly breathable non-woven fabric makes breathing just as easy as if you weren’t wearing a mask..
  • Fast, Simple, Clear and Quiet: The intuitive single-button control design thermometer reads the temperature in just 1 second from a clear bright extra-large LED screen, even in total darkness. The quiet vibration alerting ensures there is no buzzing noise and no disturbance..
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EinCar 4 Parking Car Parking Sensor Reverse Backup Radar System Kit Display View Vehicle Distance Detection Backup Sensor Reversing Sensors Universal Car Auto Radar Detector Sensors Sound Warning

  • ❆ Universal Parking Sensors: This universal car parking sensor kit consists of 4 ultrasonic sensors, digital center control box, and this car parking sensor kit comes with LED digital display shows the distance between the car and obstacle, the reverse backup radar system making the job of parking any vehicle much easier..
  • ❆ Distance Display: This car parking sensor kit not only makes beep sound warning, but aslo shows you distance data. The reverse backup radar system beep sound warning will be more frequent when distance is getting closer. Prevent future dangerous and costly collisions. Help to increase safety for passengers, pedestrians and your family..
  • ❆ 4 Parking Sensors: The car parking sensor kit with 4 auto detector sensors. 4 sensors are anti-freeze, waterproof, and quake-proof. The reverse backup radar system buzzer built-in the LED display, no need to connect to a separate buzzer out side..
  • ❆ Easy to Install: The car parking sensor kit easy to install, with detailed English manual. Perfectly fit your car with universal hole saw. This reverse backup radar system with a metal drill head, convenient to drill hole on the bumper of the car..
  • ❆ The car parking sensor kit can help you prevent future dangerous and costly collisions. And rev....
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Garmin Forerunner 920XT White/Red Watch With HRM-Run

  • Note: This product comes bundled with an HRM-Run heart rate monitor with either a black front or a black front with a red border around it. The border....
  • RUNNING DYNAMICS When paired with the HRM-RunTM monitor, the Forerunner 920XT provides feedback on running form by measuring cadence, vertical....
  • METRICS THAT MATTER Record speed, distance, ascent/descent, grade and more. Pair with ANT+ compatible sensors to measure heart rate, speed, cadence....
  • SMART NOTIFICATIONS See incoming email, text messages, call alerts, calendar reminders and more from your compatible smartphone..
  • VO2 MAX, RECOVERY TIME & RACE PREDICTOR2 Forerunner 920XT estimates VO2 max, recovery time and predicts your race times for several distances when....
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Mxzzand 3in Industrial Robot Parts Accessories Omnidirectional Wheel Metal 2Pcs for Industry Production with 10pcs Driven Roller

  • ...dge Connectors, 3 Cube Connectors, 1 L Connector, 1 U Connector. 2 Snap Connector Caps, 2 3" Rectangle Connectors, 2 4" Rectangle Connectors, 2 5" Rectangle Connectors, 2 T Connectors, 8 Colored Foam Cubes, various screws and nuts.
  • 2 Arduino-Uno-Compatible Boards, 1 USB A-B Cable, 1 Joystick, 1 RGB LED, 1 Ultrasonic Distance Sensor, 8 Red LEDs, 8 Green LEDs, 8 Blue LEDs, 8 Yellow LEDs, 2 7-Color LEDs, 2 GRB LEDs, 12 220 Ohm Resistors, 12 10k Ohm Resistors, 1 LDR VT90N2 Photoresistor, jumper wires, 3 10k Potentiometers, 1 Fullsize Breadboard, 6 Push Buttons.
  • 1 9V Battery Holder, 1 Mini Breadboard, 1 Linkbot-Arduino Cable, 1 2-in-1 Dual Phillips/Slotted Screwdriver, 3 Snap Connectors, 1 Cube Connector, 1 L Connector, 3 Mounting Plates, 2 Sensor Bracket, 1 Li-ion Rechargeable Battery,.
  • 1 Color Sensor, 2 Short Distance IR Distance Sensors,1 RGB LED Module with Common Positive Lead (Common Anode), 2 RGB LED Module with Common Negative Lead (Common Cathode), 2 Ultrasonic Range Sensors, 1 IR Range Sensor, 1 Cable for IR Range Sensor, 2 Light Sensors, 3 Line Following Sensors, 2 Touch Sensors, 4 Sensor Brackets, 4 Sensor Inserts, 1 Universal Pan-Tilt, 3 Pan-Tilt Mounts, PDF file for textbook "Learning Physical Computing with Arduino for the Absolute Beginner".
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Contemporary Authors: Biography - McCoy, J(oseph) J(erome) (1917-)

  • Face Icon Comfort Indicator: Humidity temperature gauge features face icons to indicate DRY/COMFORT/WET air conditions, quickly informs you how to adjust your humidifier or dehumidifier to achieve optimal comfort.
  • Highly Accurate Sensors: This temperature humidity sensor features a high accuracy of ±1°F/°C and ±2%-3%RH, making it ideal for measuring dynamic environments like greenhouses.
  • Fast Refresh Rate: This digital indoor thermometer refreshes every 10 seconds to provide the latest updates for temperature and humidity readings.
  • Compact Display with Large Digits: This digital thermometer indoor outdoor features a compact LCD display with large bold digits, allowing you to read the room thermometer indoor from any angle and distance.
  • Multiple Placement Options: This humidistat has 3 placement options - Tabletop Stand / Magnetic Back / Hanging Mount, place the wall thermometer anywhere you wish such as living room, baby room, kitchen, greenhouse, guitar room, office or cellar.
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Geevon 208270A5 Indoor Outdoor Weather Station Wireless Thermometer T208602 Indoor Digital Hygro-Thermometer Humidity Gauge(2 Pack)

  • ...forecast(next 12-24h weather), comfort bar, moon phases, barometric pressure..
  • T208602 - 【High Accuracy & Fast Refresh】Room thermometer for home refreshes every 30 seconds to provide you updated and the newest readings for temperature and humidity in your home with high accuracy of ±2~3%RH and ±1°F. Wide measuring range that measures temperature from -4°F to 158°F(-20°C-70°C) and humidity from 10% to 99%..
  • 208270A5 - 【Up to 3 Remote Sensors Fit 3 Channels】 Temperature and humidity monitor supports up to 3 wireless outdoor remote sensors (ONLY 1 remote sensor included), you can monitor outside conditions for different locations when you are in home. The remote sensor provides a long distance transmission range of up to 200ft/60m in an open area. (Ordering more sensors by searching ASIN: B0894H8FN6).
  • T208602 - 【3-Level Colored Air Comfort Indicator】Humidity meter with humidity level icon LOW/OK/HIGH indicates the air condition quickly at a glance. Help you monitor family's living conditions and health, ensure proper humidity and adjust the thermostat, humidifier or dehumidifier setting to prevent colds, dry-skin, asthma, allergies or mold issues, etc..
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CQRobot Ocean: 10.525GHz Doppler Effect Microwave Motion Sensor Compatible with Raspberry Pi and Arduino Board. for Industrial, Measurement, Automatic Doors, Sensor Lights, Reversing Radar, etc.

  • The microwave moves at the speed of light with great directionality. Compatible with Raspberry Pi and Arduino Board..
  • Used in industrial, transportation and civil applications such as measuring, liquid levels, automatic door motion detection, automatic washing, production line material detection and car reversing sensors etc..
  • Note: There are ultra-high frequency MOS devices inside the microwave motion sensor. If you try to use battery power to test during the test, this can avoid the breakdown caused by the static pressure difference between the power supply and the test device, such as the oscilloscope.
  • in addition, when the product is in use, Please try to choose battery power supply to ensure the best detection effect..
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