MetroQ MTQ 3165 Digital Frequency Meter

4Pin KY-026 Flame Sensor Module This 4Pin Flame Sensor Module is used to detect fire/flame sources or other light sources of the wavelength in the range of 760nm 1100 nm. It is based on the YG1006 sensor which is a high speed and high sensitive NPN silicon phototransistor. Due to its black epoxy, the sensor is sensitive to infrared radiation. The sensor can be a great addition to a firefighting robot, it can be used as a robot's eye to find the fire source. When the sensor detects flame the Signal LED will light up and the D0 pin goes LOW. The module has 2 outputs: Analogue, which gives a real-time voltage output signal on thermal resistance, and digital which allows temperature thresholds to be set via a potentiometer.

1.5 Inch Water Flow Sensor YF - DN40 The YF-DN40 water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The flow sensor measures the speed of the rotor and converts it to a flow rate. The sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The sensor is commonly used in applications such as irrigation systems, water treatment plants, and industrial process control. It is often preferred over other types of flow sensors because it is easy to install and has a low cost. The YF-DN40 sensor is designed to be installed in a pipe with a diameter of 40mm or 1.57 inches.

DFRobot Gravity Analog Water Pressure Sensor Module The Gravity Analog Water Pressure Sensor is a simple yet powerful tool that helps you monitor water systems by detecting both the presence of water and measuring its pressure. This DFRobot sensor uses a standard Gravity 3-pin interface that makes it compatible with Arduino and similar microcontrollers. It works with 5V input voltage and provides a linear output voltage between 0.5V and 4.5V that corresponds to the pressure level. When used with a Gravity IO Expansion Shield, you can connect this sensor directly to your Arduino board without any complicated wiring, making it perfect for beginners and students working on water monitoring projects. This versatile liquid pressure monitor can be the foundation of many practical applications. By combining it with components like solenoid valves and water turbine generators, you can build complete smart water systems for homes, gardens, or farms. The sensor works like a stethoscope for water pipes, helping you diagnose water flow issues and monitor pressure levels in real-time. With its waterproof design, it can be used in various environments including indoor plumbing, outdoor water sources like rivers and lakes, and water storage tanks. This makes it an excellent choice for smart home control systems, Internet of Things (IoT) projects, and equipment monitoring applications where water pressure data is important. Features Pressure measurement range from 0 to 1.6 MPa for wide application possibilities High accuracy of 0.5% for reliable measurements in critical applications Waterproof rating of IP68 allowing use in fully submerged conditions Fast response time of less than 2.0 ms for real-time monitoring G1/4 thread with included G1/2 to G1/4 adapter for easy installation Operating temperature range from -20°C to 85°C for various environments Impressive service life of over 10 million measurements for long-term reliability DFRobot Gravity Analog Water Pressure Sensor Interfacing with Arduino Connection Diagram

15cm Camera Cable for Raspberry Pi The camera cable is compatible with NoIR camera for Raspberry Pi. The 15cm Camera Cable can be used for Raspberry Pi 3 and Raspberry Pi 2. Ribbon Cable with FFC contacts (Opposite-sided).

XD-621 Induction Touch Switch The Induction touch switch is an isolated touch sensor switch, applicable to all types of lamps on the medium (such as glass, acrylic, plastic, ceramic, etc.), such as energy-saving lamps, H tubes, LED lamps, and various household appliances. It has an on-chip active low noise PGA with selectable gain of 3264 and 128. The on-chip power supply regulator for load-cell and ADC analog power supply. On-chip active low noise PGA with selectable gain of 3264 and 128. On-chip power supply regulator for load-cell and ADC analog power supply. Installation process: Note: Before installation, please turn off the main power. Set a touchpoint in the mirror, the diameter of the contact point should be 9-10mm, first of all, must remove the mercury from the mirror around the point of contact, the size for the removable mercury should be 1.5-2mm; Make a grid in the middle of the touchpoint, there are three lines of the arrow on the cover of the switch, when installed, the three lines of the arrow should align with any of the three lines of the lattice and can touch to control whether after aligning the direction, now remove the paster from the touch plate, and then can install the touch switch on the mirror, after that, you can correct it using other things to avoid falling. Applications: Household appliances Energy-saving lamp LED lamps

X9 3411 cw/ccw Blade Drone Propeller The X9 3411 CW/CCW Blade Drone Propeller is engineered to boost the performance and reliability of agricultural drones. Built using a robust blend of carbon fiber and nylon alloy, these 34×11-inch folding propellers combine strength with lightweight construction for efficient power transfer and longer flight durations. The foldable design not only helps in reducing drag and noise but also enhances flight stability. Thanks to precision dynamic balancing, the propellers minimize vibrations, ensuring better control and less strain on the drone's components. Compatible with a wide range of drone models and motor systems, these propellers are a trusted upgrade for professionals seeking high-performance aerial solutions in agriculture. Features: Exceptional durability and robustness provide long-term viability. withstands collisions and environmental conditions. Torque distribution is balanced to ensure effective propulsion. Compatible with a variety of drone types and motor configurations. Precision-engineered design ensures smooth and stable flight. Trusted for a variety of recreational and professional uses.

1/2 Inch Brass Water Flow Sensor SEN-HZ21WI The SEN-HZ21WI water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The sensor measures the speed of the rotor and converts it to a flow rate. The sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The sensor is commonly used in applications such as irrigation systems, water treatment plants, and industrial process control. It can easily measure water (liquid) flow in your application using this 1/2" Brass water flow sensor . This is a good quality flow sensor with a brass body and can be used for industrial and commercial applications. This half-inch water flow sensor is used extensively in various types of vending machines. Working of a Flow Sensor: The water flow sensor consists of a copper body, a water rotor, and a hall-effect sensor. When water flows through the rotor, the rotor rolls, its speed changes with different rates of flow. And the hall-effect sensor outputs the corresponding pulse signal. This water flow sensor is connected in line with the liquid whose flow rate has to be measured. There is a simple rotating wheel with a magnet and when the liquid flows the wheel is rotated and a hall effect sensor measures how many times the wheel is rotated and accordingly gives pulses. By counting the number of pulses you can easily calculate the flow rate as well as the amount of liquid dispensed. Note: When magnetic material is close to the sensor, its characteristics may vary. In order to avoid particle debris, the sensor must be installed after a filter. The flow sensor installation has to avoid strong vibration and shaking of the environment, so as not to affect the sensor's measurement accuracy. Applications: Widely used in water industrial fields Thermostatic water heaters Water purifiers Water dispensers Smart card equipment Coffee machines Electric hot water heater Gas water heater Instrument meter

1/4 Inch Brass Water Flow Sensor SEN-HZ41WC The SEN-HZ41WC water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The sensor measures the speed of the rotor and converts it to a flow rate. The sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The sensor is commonly used in applications such as irrigation systems, water treatment plants, and industrial process control. It is often preferred over other types of flow sensors because it is easy to install and has a low cost. Now easily measure water (liquid) flow in your application using this 1/4" Brass water flow sensor. This is a good quality flow sensor with a brass body and can be used for industrial and commercial applications. This 1/4 inch water flow sensor is used extensively in various types of vending machines. Note: When magnetic material is close to the sensor, its characteristics may vary. In order to avoid particle debris, the sensor must be installed after a filter. The flow sensor installation has to avoid strong vibration and shaking of the environment, so as not to affect the sensor's measurement accuracy. Applications: Widely used in water industrial fields Thermostatic water heaters Water purifiers Water dispensers Smart card equipment Coffee machine

3pin Percussion Knocking Knock Sensor Module The Tap sensor module is a piezoelectric device, which creates an electrical signal when mechanically deformed by a tap or knock, is commonly used as the sensor. The sensor module most likely contains the piezoelectric element as well as extra circuitry to amplify and condition the piezoelectric element's output signal. The sensor's output can be a digital signal, such as a change in voltage level or a pulse, that can be read by a microcontroller or other device. These sensors have a wide range of applications, including security systems, human-machine interfaces, and toys, where the detection of a tap or knock is required. Knock sensor module and a digital 13 interface, built-in LED build a simple circuit to produce percussion flasher. Interface comes with digital LED, will knock sensor connected digital 3 interface, when percussion sensor senses measure to percussive signals, LED flashing light.

1/4 Inch Water Flow Sensor YF - S402 The YF-S402 water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The sensor measures the speed of the rotor and converts it to a flow rate. The sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The frequency of the pulses is proportional to the flow rate of the liquid passing through the sensor. That digital signal, whose frequency is in the range between 0Hz and 100Hz, can be read directly through one of the digital input/output pins of a microcontroller. ID 8.5mm / OD 11mm. The water flow sensor measures the rate of a liquid flowing through it. The YF-S402 water flow sensor consists of a plastic valve body, flow rotor, and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler, or anything else, and control the water flow rate to suit your needs. Features: Compact and Lightweight: Easy to install and integrate into various systems. High Sealing Performance: Designed to prevent water leaks with a sealing ring. Stainless Steel Axis: Durable and abrasion-resistant. Digital Output: Provides a series of digital pulses proportional to the flow rate. Wide Voltage Range: Operates between 5V to 24V. RoHS Compliant: Meets environmental and safety standards. High Precision: Accurate measurement of water flow. Wide Flow Range: Measures flow rates from 0.3 to 6 liters per minute. Applications: Agriculture: Used in irrigation systems to monitor and control water usage. HVAC Systems: Helps in monitoring water flow in heating, ventilation, and air conditioning systems. Plumbing: Used to detect and measure water flow in residential and commercial plumbing systems. Water Treatment: Monitors water flow in treatment plants to ensure proper processing. Environmental Monitoring: Measures water flow in natural water bodies for environmental studies. Smart Home Automation: Integrated into smart home systems for monitoring water usage and detecting leaks. Automatic Water Dispensers: Used in vending machines and dispensers to control water flow. Coffee Machines: Ensures precise water flow for brewing coffee.

T-Cobbler with Cable This is the assembled version of the Pi T-Cobbler Plus. It only works with the Raspberry Pi Model Zero, A+, B+, Pi 2, Pi 3 The Raspberry Pi has landed on the Maker World like a 40-GPIO pinned, quad-USB ported, credit card sized bomb of DIY joy. And while you can use most of our great Model B accessories by hooking up our downgrade cable, it's probably a good time to upgrade your set up and accessorize using all of the 40 pins. The T-Cobbler Plus is an add on prototyping board specifically designed for the 2x20 connector-type Raspberry Pi, and can break out all those tasty powers, GPIO, I2C and SPI pins from the 40-pin header onto a solderless breadboard. This set will make cobbling together prototypes with the Pi super easy. Each order comes with a 40 pin ribbon cable and assembled T-Cobbler Plus. You can plug the 40-pin GPIO cable between the Pi computer and the T-Cobbler breakout. You can plug the 40-pin GPIO cable between the Pi computer and the T-Cobbler breakout. The T-Cobbler can plug into any solderless breadboard (or even a prototyping board like the PermaProto). The T-Cobbler PCB has all the pins labeled nicely so you can go forth and build circuits without keeping a pin-out printout at your desk. We think this will make it more fun to expand the Pi and build custom circuitry with it. Also check the Raspberry Pi T-Cobbler Plus, available on the Iotcart website. This is the assembled version of the T-Cobbler Plus, designed for the 2x20 connector-type Raspberry Pi, compatible with models A+, B+, Pi 2, and Pi 3. It eliminates the need for soldering and allows easy prototyping by breaking out GPIO, I2C, SPI, and power pins from the 40-pin header onto a solderless breadboard.

1/2 Inch Water Flow Sensor SEN-HZ21WA The SEN-HZ21WA water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The sensor measures the speed of the rotor and converts it to a flow rate. The flow sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The sensor is commonly used in applications such as irrigation systems, water treatment plants, and industrial process control. It is often preferred over other types of flow sensors because it is easy to install and has a low cost. The SEN-HZ21WA sensor is designed to be installed in a pipe with a diameter of 1/2 inch (12.7mm). A pinwheel inside the sensor moves as the liquid flows through the sensor. A hall effect sensor within the sensor senses the rotation of the pinwheel and outputs a digital pulse for every rotation. By counting the pulses from the sensor, you can easily sense liquid flow through the sensor. This allows easy interface to microcontroller, Arduino , Raspberry Pi , etc. Applications: Water testing Water cooling systems Measure liquid flow

Solar Power Manager 5V Solar Power Manager 5V is the ultimate solution for efficient solar panel management. Featuring MPPT technology, this module maximizes the performance of your 5V solar panel, making it ideal for a variety of IoT projects and renewable energy applications. Designed to provide up to 900mA charging current to a 3.7V Li battery through USB or solar panel, it ensures a reliable power supply. The ON/OFF controllable DC-DC converters with a 5V 1A output cater to the needs of different solar power projects and low-power applications. Safety is paramount, and Solar Power Manager 5V incorporates various protection functions for the battery, solar panel, and output. This enhances the stability and safety of your solar projects, making it a dependable choice for makers and application engineers. Crafted with precision, Solar Power Manager 5V is perfect for small solar street lamps, solar-powered robots, and solar power banks. Its user-friendly design, efficient charging options, and versatile applications make it an indispensable component for your projects. Features: Constant voltage MPPT algorithm, maximizing solar panel efficiency Designed for 5V solar panel Double charging mode: solar/USB charger (900mA max charge current) 5V ON/OFF controllable regulated power supply for low-power applications All-round protection functions USB connector with ESD shell Pin Diagram: Applications: Smart solar environment monitor system Solar powered robot Small solar street lamp Solar power bank Solar Cells and Panels with Arduino

Sound Sensor Module This Sound Detection Sensor Module consists of a Microphone, resistors, capacitor, potentiometer, comparator LM393 IC, Power, and status LED in an integrated circuit. Sound Detection Module Sensor for Intelligent Vehicle Compatible With Arduino is a Single channel signal output Sensor. The output is effective to the low-level sound signal with good fidelity, When there is sound, outputs low level and signal light. It can be used for Acoustic control light, give sound and light alarm working with the Photosensitive sensor, and sound control, sound detect. (The Maximum induction distance is 0.5M). This is an Arduino compatible module. Using this module you can even measure the intensity of ambient sound. Most of the digital sound sensor module just provides digital output i.e. if the sound is present or not. But this Sound sensor module also provides an analog output voltage that is directly proportional to the intensity of the ambient sound. Read our blog explaining the classification of sensors in IoT detailing 5 core classifications depending on how they work, 10 types of sensors, and the Characteristics of Sensors in IoT. Check out our collection of sensor at great prices! Applications: Hearing aids Telephones Tape recorders and karaoke Live and recorded audio engineering Radio and television broadcasting Speech recognition technology read our blog explaining what is sound sensor , provides information about sound sensors, covering their working principle, features, applications, and interfacing with Arduino.

Peacefair PZEM-004T 110V/220V 100A Smart Energy Meter The Peacefair PZEM-004T 110V/220V 100A Smart Energy Meter is a reliable and versatile tool designed for accurate single-phase energy monitoring. Supporting both 110V and 220V AC systems, it’s suitable for a variety of electrical setups and applications. With a current measurement capacity of up to 100A, it fits well in residential, industrial, and smart automation environments. Equipped with Modbus TTL communication, it enables seamless integration into data logging or control systems. This smart meter delivers real-time, precise insights into key parameters such as voltage, current, power, and energy consumption, making it an essential tool for efficient energy management. Features: It is compatible with both 110V and 220V AC systems, allowing for flexible usage. It measures up to 100A, ensuring accurate monitoring of high-power electrical systems. It continuously monitors voltage, current, power, and energy consumption to ensure accurate statistics. It supports Modbus TTL communication, making it easy to incorporate into industrial automation and control systems. It measures voltage, current, active power (W), energy consumption (kWh), frequency, and power factor, providing comprehensive data. Its compact size and sturdy construction make it ideal for long-term use and straightforward installation.