DC 12V KK-P25/20 8KG Lifting Solenoid Electromagnet This DC 12V KK-P25/20 8KG Lifting Solenoid Electromagnet consists of an iron core and a coil to attract magnetic substances, using the magnetic action induced by electric current, only while the current is applied. This compact functional device offers high power with high reliability. The structure and design to release the residual magnetism left after de-energization is also one of its unique features. Working Principle: An electromagnet is simply a coil of wire. It is usually wound around an iron core. However, it could be wound around an air core, in which case it is called a solenoid. When connected to a DC voltage or current source, the electromagnet becomes energized, creating a magnetic field just like a permanent magnet. The magnetic flux density is proportional to the magnitude of the current flowing in the wire of the electromagnet. The polarity of the electromagnet is determined by the direction of the current. The north pole of the electromagnet is determined by using your right hand. Wrap your fingers around the coil in the same direction as the current is flowing (conventional current flows from + to -). The direction your thumb is pointing in the direction of the magnetic field so north would come out of the electromagnet in the direction of your thumb. DC electromagnets are principally used to pick up or hold objects. Precaution: Electromagnets must meet the following conditions to achieve maximum suction: The object to be sucked must have good magnetic permeability. Proper use of power supply, rated voltage. The object to be sucked must be flat and clean. The object to be sucked must be greater than or equal to the surface of the magnet( For example the magnet is 20 x 15 mm, so the surface area is S=r²?=10²? mm² so the object to be sucked must be greater than or equal to 10²? mm² ) The object to be sucked must be greater than 5mm. (If the thickness decreases, the suction decreases) The object to be sucked must be close, the middle can’t be interspersed with objects or gaps Suction means more than 5cm in thickness, and surface roughness, the surface is greater than the cross-sectional area of the electromagnet and maximum suction completely fits together on an iron-based material. Electromagnet in working conditions electromagnetic conversion would produce a certain amount of heat, electricity more frequently the higher temperature, which is a normal phenomenon.

DFRobot Gravity 7/24 Industrial Analog pH Meter Kit for Arduino & Raspberry Pi Project The Gravity: 7/24 Industrial Analog pH Meter Kit (SEN0169-V2) is a professional-grade water quality monitor designed for continuous, real-time pH measurement in demanding environments. This upgraded version significantly improves precision and user experience compared to its predecessor. The kit includes an industrial-grade pH probe that supports 24/7 monitoring with a lifespan exceeding 4380 hours, ensuring consistent performance even in harsh conditions. The onboard voltage regulator chip supports a wide voltage supply range of 3.3V to 5.5V, making this industrial pH sensor compatible with both 5V and 3.3V main control boards such as Arduino, Raspberry Pi, and LattePanda. Its hardware-filtered output signal delivers low jitter for stable readings. What sets this Arduino pH meter apart is its exceptional accuracy of ±0.1 pH at 25°C and user-friendly calibration process. The software library adopts a two-point calibration method that can automatically identify standard buffer solutions (4.0 and 7.0), making the setup process simple and convenient. The industrial pH combination electrode features a sensitive glass membrane with low impedance, providing fast response times and good thermal stability. With its linear output voltage across the 0 to 14 pH range and excellent anti-pollution performance, this continuous pH measurement system is ideal for long-term online detection in applications such as aquaponics, aquaculture, chemical monitoring, and environmental water testing. Features Supports 24/7 continuous monitoring with lifespan exceeding 4380 hours. High measurement accuracy of ±0.1 pH at 25°C for precise readings. Two-point calibration using standard buffer solutions (4.0 and 7.0). Wide operating voltage range of 3.3V to 5.5V for versatile compatibility. BNC connector and Gravity interface for easy plug-and-play setup. Industrial pH probe with sensitive glass membrane and low impedance. Measurement range of 0 to 14 pH for comprehensive testing capabilities. DFRobot Gravity 7/24 Industrial Analog pH Meter with Arduino Connection Diagram Important Notes: Keep the BNC connector and signal conversion board dry and clean. Moisture can lower the input impedance, causing inaccurate readings. If damp, dry them before use. Do not place the signal conversion board on wet or conductive surfaces. This may affect accuracy. Use nylon standoffs to mount it, maintaining a gap between the board and the surface. The glass tip of the pH probe is delicate. Avoid contact with hard surfaces. Scratches or cracks can damage the probe. After use, disconnect the pH probe from the signal board. Do not leave it connected when the board is powered off for long periods. The probe cap contains protective liquid (3.3mol/L KCL). Some leakage and white crystal formation around the cap is normal. As long as there’s still liquid inside, the probe will remain accurate. You can return the crystals to the cap if needed.

DFRobot Gravity Analog Rotation Potentiometer Sensor for Arduino - Rotation 300° The Gravity Analog Rotation Potentiometer Sensor for Arduino is a versatile Arduino rotation sensor that provides a practical way to add manual control to your electronic projects. With its 300-degree rotation range, this analog potentiometer module allows users to input varying voltage levels by simply turning the knob, making it perfect for applications like controlling LED brightness, adjusting motor speed, or creating interactive controls for DIY projects. The sensor features the standardized Gravity interface, ensuring easy plug-and-play connectivity with Arduino boards and compatible microcontrollers without requiring additional wiring or complex setup procedures. What makes this 300-degree rotation sensor particularly useful is its compatibility with both 5V Arduino systems and 3.3V platforms like Raspberry Pi, Intel Edison, Joule, and Curie. This versatility allows students and hobbyists to use the same sensor across different development platforms without worrying about voltage compatibility issues. The Gravity interface potentiometer provides analog output that can be subdivided into 1024 distinct levels, offering precise control for various applications. Whether you're building a smart cooling fan, creating an interactive control panel, or teaching basic analog input concepts, this potentiometer sensor offers a reliable and straightforward solution that's accessible to beginners while being versatile enough for more advanced projects. Features: 300-degree rotation range for precise analog control. Compatible with both 5V and 3.3V systems for versatile use. Gravity interface design for simple plug-and-play connection. Analog output can be divided into 1024 steps for fine adjustment. Works perfectly with IO Sensor Expansion Shield for Arduino. No additional library required for basic functionality. Compact design for easy integration into various projects.

DFRobot Gravity Analog TDS Water Quality Sensor/Meter for Arduino The DFRobot Gravity Analog TDS Water Quality Sensor is an Arduino-compatible sensor designed to measure the Total Dissolved Solids (TDS) in water, offering a practical way to monitor water cleanliness. This easy-to-use TDS sensor is ideal for domestic water testing, hydroponics, and other water quality applications, helping you build your own DIY water monitoring system. With a wide voltage input range (3.3V to 5.5V) and analog voltage output (0–2.3V), it is compatible with most 3.3V or 5V microcontrollers. Unlike traditional TDS pens, this sensor transmits real-time data to your control system. It uses an AC signal to reduce probe polarization, extending its lifespan and improving measurement stability. Waterproof and durable, the TDS probe can be immersed long-term, making it perfect for continuous water quality analysis. Important Guidelines Do not use the probe in water temperatures above 55°C. Avoid placing the probe too close to the container’s edge, as it may affect reading accuracy. While the probe head and cable are waterproof, the connector and signal transmitter board are not—handle with care to avoid water damage. Features Supports wide voltage input from 3.3V to 5.5V Outputs a 0~2.3V analog signal, compatible with both 5V and 3.3V controllers AC excitation source prevents probe polarization and enhances stability Waterproof TDS probe suitable for continuous immersion Easy to use with Arduino: plug-and-play design, no soldering required

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

DFRobot Gravity ENS160 Air Quality Sensor The Gravity: ENS160 Air Quality Sensor (SEN0514) is a cutting-edge device based on ScioSense's new ENS160 sensor chip, specifically engineered for comprehensive indoor air quality monitoring. This DFRobot sensor stands out with its ability to detect multiple IAQ data points including Total Volatile Organic Compounds (TVOC), equivalent carbon dioxide (eCO2), and Air Quality Index (AQI). The innovative TrueVOC™ technology, combined with metal oxide (MOX) technology, provides this environmental sensor with exceptional accuracy, rapid response times, and strong resistance to interference, making it reliable for everyday use in various settings. What makes this air pollution detector particularly user-friendly is its intelligent on-chip algorithms that process complex air quality data and deliver easy-to-understand environmental readings. Simply preheat the sensor for just 3 minutes before use to obtain quick and accurate measurements of your surrounding air quality. The Gravity ENS160 also features a built-in automatic baseline correction algorithm that ensures the air quality monitor maintains stable and consistent performance over extended periods. Whether you're creating an air purification system, environmental pollution detection setup, or integrating it into smart home automation, this versatile TVOC eCO2 monitor delivers reliable data through its simple I2C interface. Features Multiple IAQ outputs: TVOC, eCO2, and AQI for detailed air quality assessment. Less than 3 minutes warm-up time for faster data acquisition. Built-in intelligent algorithms for more accurate output readings. Anti-interference technology for reliable readings in various conditions. Easy integration with Arduino, Raspberry Pi, and other microcontrollers. I2C communication interface for simple connection and data transfer. Suitable for HVAC/ventilation system monitoring. DFRobot Gravity ENS160 Air Quality Sensor with Arduino Circuit Diagram

DFRobot Gravity Industrial Stainless Steel Submersible Pressure Water Level Sensor 0-5m This tough Industrial Stainless Steel Pressure Sensor is excellent for checking the level of water or other liquids in places like storage tanks, deep wells, or even small rivers. It can accurately measure liquid depths from 0 all the way up to 5 meters. Because it's made from strong stainless steel, it doesn't rust easily and you can place it directly into water, oil, or even slightly thick liquids without any worries about damage. It’s a very handy Submersible Level Sensor 0-5m that sends out an industry-standard 4-20mA Water Level Sensor current signal. This type of signal is commonly understood by many industrial control systems (PLCs) and other professional equipment. You can also easily connect this Gravity Pressure Level Sensor to microcontrollers like Arduino (usually with a simple converter module) for your own science projects or automatic systems, making it simple to monitor liquid levels precisely. Important Notes: Follow the power supply connection instructions carefully. Do not disassemble, drop, or strike the sensor. Avoid touching the diaphragm with sharp objects. The sensor works immediately after powering on but gives stable output after 30 minutes of preheating. Stop using if any abnormality occurs. Install the sensor vertically downward. Ensure the terminal is waterproof to prevent water entry. Submerge the probe properly, secure it in place, and keep it away from the water inlet. DFRobot Gravity Submersible Pressure Water Level Sensor with Arduino Circuit Diagram Dimensions Features Measuring Range: 0 to 5 meters water depth. Output Signal: Industry-standard 4-20mA current. Body Material: Tough 304 Stainless Steel shell. Waterproof: IP68 rated for full submersion. Accuracy: Precise readings with 0.5% Full Scale. Power Supply: Works with 12V to 36V DC.

DFRobot Gravity Tipping Bucket Rainfall Sensor - I2C & UART The DFRobot Gravity Tipping Bucket Rainfall Sensor is a reliable and convenient tool designed for precise rainfall measurement in various applications. Based on the tipping bucket rainfall principle, this rainfall measurement sensor provides accurate precipitation data in millimeters along with system operating time information. What makes this sensor particularly effective is its thoughtful design - it contains no electronic components inside the measurement mechanism and features a hollow bottom that allows rainwater to automatically drain away. These design choices significantly enhance the stability and sensitivity of the sensor, making it ideal for continuous outdoor monitoring in weather stations, environmental research, or agricultural applications. This versatile tipping bucket rain gauge supports both I2C and UART data outputs, making it compatible with a wide range of popular platforms including micro:bit, Arduino, ESP32, and Raspberry Pi. Setting up a complete rain monitoring system is straightforward thanks to the integrated easy-to-use Gravity interface and the provided ready-to-go libraries. The Arduino rainfall detector works by collecting rainwater through its top inlet, which then flows into the tipping bucket through a funnel. When sufficient water accumulates, the bucket tips over, generating a pulse signal that allows the controller to calculate rainfall amount. This reliable mechanism makes the sensor perfect for delivering high-quality rainfall data for weather station equipment setups, environmental monitoring stations, or smart farming applications. Note: The signal adapter board is not waterproof. Do not expose the signal adapter board to rain. Features Working voltage range of 3.3V to 5.5V DC for flexible power options. Low current consumption of less than 3mA for efficient operation. Precise measurement resolution of 0.28mm for accurate rainfall data. Wide operating temperature range from -40°C to 85°C for all-weather use. Tipping bucket size: 118mm × 59mm × 80mm for effective rain collection. Signal adapter board dimensions: 32mm × 37mm for compact installation. Includes rainfall sensor, signal adapter, and Gravity 4-pin connection cable. Circuit Diagram of Gravity Tipping Bucket Rainfall Sensor and Arduino Uno

The Differential Pressure Transmitter(DPT) senses differential pressure in pressure independent Variable Air Volume (VAV) applications. It sends an analog signal that is proportional to velocity pressure to a VAV controller. The DPT is available mounted to an M9104 or M9106 Electric Non-spring Return Actuator or to the Johnson Controls VAV controller for reliable damper positioning in closed-loop applications. The may also be mounted alone as an independent pressure transmitter or used for damper positioning in other VAV systems. The DPT is connected to the VAV box airflow pickups and measures differential pressure and generates a proportional voltage signal. The voltage signal from the DPT is read by the VAV controller and converted to airflow in cubic feet per minute (cfm). Calibration is not required other than zero calibration, which is performed within the controller.

Digital Voltmeter Ammeter DC 100V 100A Dual Led Voltage Monitor Panel (Without Shunt) This is Red-Blue LED Digital Dual DC 100V 100A Ammeter Voltmeter. This meter will measure up to 100 VDC with a 0.1-volt resolution. One thing to note is, this meter has 2 wiring harnesses. One harness is to provide power for the meters , that’s the 2 poles with a RED and a BLACK lead. Small size, portable, the magnitudes of voltage and current are displayed on the same screen at the same time. This can be supplied anywhere from 6 volts DC up to 30 VDC. Maximum Input Voltage should not exceed 30V otherwise there is a danger of burning Note : Shunt resistor is not included with this product Features: Runs on 5V power supply. Shows voltage in red and current in blue. Requires less than or equal to 60mA of current. Can measure from 0V to 100V DC. Capable of measuring current from 0A to 100A. Provides accuracy of ±1% (plus or minus 1 digit). Operates effectively in temperatures ranging from -10°C to 65°C. Updates readings every 500 milliseconds for real-time monitoring.