IntroductionDFRobot Gravity: Analog pH meter pro V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. It is commonly used in various applications such as aquaponics, aquaculture, and environmental water testing.You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series. As an upgraded version of pH meter pro V1, the secondary generation pH meter pro greatly improves the precision and user experience. The onboard voltage regulator chip supports the wide voltage supply of 3.3~5.5V, which is compatible with 5V and 3.3V main control boards, such as Arduino and LattePanda. The output signal filtered by hardware has low jitter. The software library adopts the two-point calibration method, and can automatically identify two standard buffer solutions (4.0 and 7.0), so simple and convenient. It uses an industry electrode and has a built-in simple, convenient, practical connection and long life, very suitable for online monitoring.This industry pH combination electrode is made of a sensitive glass membrane with low impedance. It can be used in a variety of PH measurements with fast response, and good thermal stability. It has good reproducibility, difficult to hydrolysis, and basically eliminates the alkali error. Between 0 to 14 pH range, the output voltage of the electrode is linear. The reference system which consists of the Ag/AgCl gel electrolyte salt bridge has a stable half-cell potential and excellent anti-pollution performance. The ring PTFE membrane is not easy to be clogged, so the electrode is suitable for long-term online detection.With this product, the main control board (such as Arduino), and the software library, you can quickly build the pH meter, plug, and play, with no welding. DFRobot provides a variety of water quality sensor products, uniform size, and interface, not only meeting the needs of various water quality testing but are also suitable for the DIY multi-parameter water quality tester. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.The pH is a value that measures the acidity or alkalinity of the solution. It is also called the hydrogen ion concentration index. The pH is a scale of hydrogen ion activity in the solution. The pH has a wide range of uses in medicine, chemistry, and agriculture. Usually, the pH is a number between 0 to 14. Under the thermodynamic standard conditions, pH=7, which means the solution is neutral; pH<7, which means the solution is acidic; pH>7, which means the solution is alkaline.Gravity: Analog pH Sensor /Meter Pro V2Arduino Connection DiagramAttention：1. The BNC connector and the signal conversion board must be kept dry and clean, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. If it is damp, it needs to be dried.2. The signal conversion board cannot be directly placed on a wet or semiconductor surface, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. It is recommended to use the nylon pillar to fix the signal conversion board, and allow a certain distance between the signal conversion board and the surface.3. The sensitive glass bubble in the head of the pH probe should avoid touching the hard material. Any damage or scratches will cause the electrode to fail.4. After completing the measurement, disconnect the pH probe from the signal conversion board. The pH probe should not be connected to the signal conversion board without the power supply for a long time.5. The bottle cap of the probe contains protective liquid (3.3mol/L KCL). Even if the bottle cap is screwed tightly, some protective liquid may still leak around the bottle cap, forming white crystals. But as long as there is still protective liquid in the bottle cap, it will not affect the life and accuracy of the probe. So please use it with confidence. It is recommended that the white crystals be poured back into the protective liquid in the bottle cap.Features3.3~5.5V wide voltage inputHardware filtered output signal, low jitterGravity connector and BNC connector, plug-and-play, no soldering requiredThe software library supports two-point calibration and automatically identifies standard buffer solutionUniform size and connector, convenient for the design of mechanical structuresIndustrial Probe - Support 7*24 MeasurementUpgraded Transmitter - More Accurate and StableSpecificationSignal Conversion Board (Transmitter) V2Supply Voltage: 3.3~5.5VOutput Voltage: 0~3.0VProbe Connector: BNCSignal Connector: PH2.0-3PMeasurement Accuracy: ±0.1@25℃Dimension: 42mm*32mm/1.66*1.26inpH ProbeProbe Type: Industrial GradeDetection Range: 0~14Temperature Range: 0~60°CAccuracy : ± 0.1pH (25 ℃) Response Time: <1minProbe Life: 7*24hours >0.5 years (depending on the water quality)Cable Length: 500cmDocumentsDFRobot Gravity: Analog pH meter pro V2 Product wikiLiquid Sensor Selection GuideShipping ListpH Probe (Industrial Grade) x1pH Signal Conversion Board V2 x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1M3 * 10 nylon pillar x4M3 * 5 screws x8
IntroductionArduino Opta, specially designed for PLC engineers, is a secure, easy-to-use micro PLC with industrial IoT capabilities.Opta is equipped with frequently used networks and protocols in multiple industries, and supports both Arduino sketch and standard PLC languages, including LD (Ladder Logic Diagram) and FBD (Function Block Diagram). And its powerful STM32H747XI dual-core Cortex-M7 + M4 MCU allows users to perform real-time control, monitoring and implement predictive maintenance applications.Secure and durable by design, Opta supports OTA firmware updates and ensures data security from the hardware to the Cloud thanks to the onboard secure element and X.509 standard compliance. Meanwhile, it maintains Arduino Pro's signature easy deployment in production thanks to a vast range of readily available software libraries and Arduino sketches. Last but not least, various connectivity options make keeping everything under control effortless via real-time dashboards combined with intuitive Arduino Cloud (or third-party services). Users can update wireless firmware and achieve remote control easily.Opta is mainly programmed on Arduino PLC IDE, which makes PLC programming easy. Choose any of the 5 programming languages defined by the IEC 61131-3 standard (Ladder, Functional Block Diagram, Structured Text, Sequential Function Chart, or Instruction List) and users can quickly code PLC applications or port existing ones to Arduino Opta.Integrate the micro PLC with users' existing machines, devices, and production lines, or combine it with other elements in the modular and versatile Arduino ecosystem, from small and smart sensor-packed modules to SOMs to gateways, for end-to-end solutions that can be customized to meet any need.Integrate the micro PLC with users' existing machines, devices, and production lines, or combine it with other elements in the modular and versatile Arduino ecosystem, from small and smart sensor-packed modules to SOMs to gateways, for end-to-end solutions that can be customized to meet any need.Arduino Opta is available in three variants:Arduino Opta Lite: onboard Ethernet and USB-C portsArduino Opta RS485: onboard Ethernet and USB-C ports, plus RS-485 connectivityArduino Opta WiFi: onboard Ethernet and USB-C ports, plus RS-485 and WiFi/Bluetooth LEApplicationsEnergy managementTank level monitoringUse as an RTUSpecificationSupply Voltage: 12-24VDCInput: Analog/digital input × 8Output: Relay × 4 - Normally Open (NO) - Maximum: 10A per relayProcessor: Dual-core ST STM32H747XI processorMemory: 1 MB RAM(Programming)Flash memory: 2 MBFlash QSPI: 16 MB Flash QSPIProgramming Languages: Arduino + IEC-61131-3 (LD-SFC-FBD-ST-IL)USB Connection: Used for host and device operations, programming/refresh, and power supply for programming (not for driving external high-power peripherals)Communication: support 10/100 Ethernet (TCP/IP or Modbus TCP) USB-C RS485 half duplexSecurity: ATECC608B secure elementIP Protection: IP20Operating Temperature: -20℃ to 50℃ (-4℉ to 122℉)Compatible with DIN railDocumentsProduct wikiDatasheetFull PinoutGetting Started with Opta™Shipping ListArduino Opta RS485 Micro PLC x1
IntroductionDFRobot Gravity: Analog pH meter pro V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. It is commonly used in various applications such as aquaponics, aquaculture, and environmental water testing.You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series. As an upgraded version of pH meter pro V1, the secondary generation pH meter pro greatly improves the precision and user experience. The onboard voltage regulator chip supports the wide voltage supply of 3.3~5.5V, which is compatible with 5V and 3.3V main control boards, such as Arduino and LattePanda. The output signal filtered by hardware has low jitter. The software library adopts the two-point calibration method, and can automatically identify two standard buffer solutions (4.0 and 7.0), so simple and convenient. It uses an industry electrode and has a built-in simple, convenient, practical connection and long life, very suitable for online monitoring.This industry pH combination electrode is made of a sensitive glass membrane with low impedance. It can be used in a variety of PH measurements with fast response, and good thermal stability. It has good reproducibility, difficult to hydrolysis, and basically eliminates the alkali error. Between 0 to 14 pH range, the output voltage of the electrode is linear. The reference system which consists of the Ag/AgCl gel electrolyte salt bridge has a stable half-cell potential and excellent anti-pollution performance. The ring PTFE membrane is not easy to be clogged, so the electrode is suitable for long-term online detection.With this product, the main control board (such as Arduino), and the software library, you can quickly build the pH meter, plug, and play, with no welding. DFRobot provides a variety of water quality sensor products, uniform size, and interface, not only meeting the needs of various water quality testing but are also suitable for the DIY multi-parameter water quality tester. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.The pH is a value that measures the acidity or alkalinity of the solution. It is also called the hydrogen ion concentration index. The pH is a scale of hydrogen ion activity in the solution. The pH has a wide range of uses in medicine, chemistry, and agriculture. Usually, the pH is a number between 0 to 14. Under the thermodynamic standard conditions, pH=7, which means the solution is neutral; pH<7, which means the solution is acidic; pH>7, which means the solution is alkaline.Gravity: Analog pH Sensor /Meter Pro V2Arduino Connection DiagramAttention：1. The BNC connector and the signal conversion board must be kept dry and clean, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. If it is damp, it needs to be dried.2. The signal conversion board cannot be directly placed on a wet or semiconductor surface, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. It is recommended to use the nylon pillar to fix the signal conversion board, and allow a certain distance between the signal conversion board and the surface.3. The sensitive glass bubble in the head of the pH probe should avoid touching the hard material. Any damage or scratches will cause the electrode to fail.4. After completing the measurement, disconnect the pH probe from the signal conversion board. The pH probe should not be connected to the signal conversion board without the power supply for a long time.5. The bottle cap of the probe contains protective liquid (3.3mol/L KCL). Even if the bottle cap is screwed tightly, some protective liquid may still leak around the bottle cap, forming white crystals. But as long as there is still protective liquid in the bottle cap, it will not affect the life and accuracy of the probe. So please use it with confidence. It is recommended that the white crystals be poured back into the protective liquid in the bottle cap.Features3.3~5.5V wide voltage inputHardware filtered output signal, low jitterGravity connector and BNC connector, plug-and-play, no soldering requiredThe software library supports two-point calibration and automatically identifies standard buffer solutionUniform size and connector, convenient for the design of mechanical structuresIndustrial Probe - Support 7*24 MeasurementUpgraded Transmitter - More Accurate and StableSpecificationSignal Conversion Board (Transmitter) V2Supply Voltage: 3.3~5.5VOutput Voltage: 0~3.0VProbe Connector: BNCSignal Connector: PH2.0-3PMeasurement Accuracy: ±0.1@25℃Dimension: 42mm*32mm/1.66*1.26inpH ProbeProbe Type: Industrial GradeDetection Range: 0~14Temperature Range: 0~60°CAccuracy : ± 0.1pH (25 ℃) Response Time: <1minProbe Life: 7*24hours >0.5 years (depending on the water quality)Cable Length: 500cmDocumentsDFRobot Gravity: Analog pH meter pro V2 Product wikiLiquid Sensor Selection GuideShipping ListpH Probe (Industrial Grade) x1pH Signal Conversion Board V2 x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1M3 * 10 nylon pillar x4M3 * 5 screws x8
IntroductionArduino Opta, specially designed for PLC engineers, is a secure, easy-to-use micro PLC with industrial IoT capabilities.Opta is equipped with frequently used networks and protocols in multiple industries, and supports both Arduino sketch and standard PLC languages, including LD (Ladder Logic Diagram) and FBD (Function Block Diagram). And its powerful STM32H747XI dual-core Cortex-M7 + M4 MCU allows users to perform real-time control, monitoring and implement predictive maintenance applications.Secure and durable by design, Opta supports OTA firmware updates and ensures data security from the hardware to the Cloud thanks to the onboard secure element and X.509 standard compliance. Meanwhile, it maintains Arduino Pro's signature easy deployment in production thanks to a vast range of readily available software libraries and Arduino sketches. Last but not least, various connectivity options make keeping everything under control effortless via real-time dashboards combined with intuitive Arduino Cloud (or third-party services). Users can update wireless firmware and achieve remote control easily.Opta is mainly programmed on Arduino PLC IDE, which makes PLC programming easy. Choose any of the 5 programming languages defined by the IEC 61131-3 standard (Ladder, Functional Block Diagram, Structured Text, Sequential Function Chart, or Instruction List) and users can quickly code PLC applications or port existing ones to Arduino Opta.Integrate the micro PLC with users' existing machines, devices, and production lines, or combine it with other elements in the modular and versatile Arduino ecosystem, from small and smart sensor-packed modules to SOMs to gateways, for end-to-end solutions that can be customized to meet any need.Integrate the micro PLC with users' existing machines, devices, and production lines, or combine it with other elements in the modular and versatile Arduino ecosystem, from small and smart sensor-packed modules to SOMs to gateways, for end-to-end solutions that can be customized to meet any need.Arduino Opta is available in three variants:Arduino Opta Lite: onboard Ethernet and USB-C portsArduino Opta RS485: onboard Ethernet and USB-C ports, plus RS-485 connectivityArduino Opta WiFi: onboard Ethernet and USB-C ports, plus RS-485 and WiFi/Bluetooth LEApplicationsEnergy managementTank level monitoringUse as an RTUSpecificationSupply Voltage: 12-24VDCInput: Analog/digital input × 8Output: Relay × 4 - Normally Open (NO) - Maximum: 10A per relayProcessor: Dual-core ST STM32H747XI processorMemory: 1 MB RAM(Programming)Flash memory: 2 MBFlash QSPI: 16 MB Flash QSPIProgramming Languages: Arduino + IEC-61131-3 (LD-SFC-FBD-ST-IL)USB Connection: Used for host and device operations, programming/refresh, and power supply for programming (not for driving external high-power peripherals)Communication: support 10/100 Ethernet (TCP/IP or Modbus TCP) USB-C RS485 half duplexSecurity: ATECC608B secure elementIP Protection: IP20Operating Temperature: -20℃ to 50℃ (-4℉ to 122℉)Compatible with DIN railDocumentsProduct wikiDatasheetFull PinoutGetting Started with Opta™Shipping ListArduino Opta RS485 Micro PLC x1
