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
IntroductionThis is a dissolved oxygen sensor kit. A dissolved oxygen meter is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science, etc. There’s an old saying regarding keeping fish, “Good fish deserves good water”. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters to reflect water quality. Low dissolved oxygen in the water will lead to difficulty in breathing for aquatic organisms, which may threaten their lives.The probe is galvanic, does not need polarization time, and stays available at any time. The filling solution and membrane cap are replaceable, leading to the low maintenance cost. The signal converter board is plug-and-play and works from 3.3V - 5V which makes it compatible with most popular microcontrollers such as ESP32, Raspberry Pi and Arduino. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.SPECIAL INSTRUCTION:Due to the International Import and Export Policy, the corrosive solution (acid & alkaline solution) cannot be delivered by air transportation. The filling solution is not included in the kit. You have to purchase it from the local shop or deploy the solution by yourself, refer to WiKi FAQ-Q4. It can’t work without a filling solution! Please be cautious with the purchase!Note:1. The filling solution is 0.5 mol/L NaOH solution. You need to pour it into the membrane cap before use. Please be cautious with the operation because the solution is corrosive. Please wear gloves! If the solution accidentally drops onto the skin, wash your skin with plenty of water immediately.2. The oxygen permeable membrane in the membrane cap is sensitive and fragile. Be cautious when handling it. Fingernail and other sharp objects should be avoided.3. The DO sensor will consume a little oxygen during the measurement. Please gently stir the solution and let the oxygen be distributed evenly in the water.FeaturesDissolved Oxygen Probe：1. Galvanic probe, no need polarization timE2. Filling solution and membrane cap is replaceable, low maintenance costSignal Converter Board：1. 3.3~5.5V wide-range power supply, compatible with most Arduino microcontroller2. 0~3.0V analog output, compatible with all microcontrollers with ADC function.3. Gravity interface, plug, and play, easy to useSpecificationDissolved Oxygen ProbeType: Galvanic ProbeDetection Range: 0~20mg/LResponse Time: Up to 98% full response, within 90 seconds (25℃)Pressure Range: 0~50PSIElectrode Service Life: 1 year (normal use)Maintenance Period: Membrane Cap Replacement Period: 1~2 months (in muddy water); 4~5 months (in clean water) Filling Solution Replacement Period: Once every monthCable Length: 2 metersProbe Connector: BNCSignal Converter BoardOperating Voltage: 3.3~5.5VOutput Signal: 0~3.0VCable Connector: BNCSignal Connector: Gravity Analog Interface (PH2.0-3P)Dimension: 42mm * 32mmDocumentsDissolved oxygen sensor Product WIKIShipping ListGalvanic Dissolved Oxygen Probe with Membrane Cap x1Spare Membrane Cap x1Signal Converter Board x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1Plastic Dropper x2
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
IntroductionThis is a dissolved oxygen sensor kit. A dissolved oxygen meter is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science, etc. There’s an old saying regarding keeping fish, “Good fish deserves good water”. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters to reflect water quality. Low dissolved oxygen in the water will lead to difficulty in breathing for aquatic organisms, which may threaten their lives.The probe is galvanic, does not need polarization time, and stays available at any time. The filling solution and membrane cap are replaceable, leading to the low maintenance cost. The signal converter board is plug-and-play and works from 3.3V - 5V which makes it compatible with most popular microcontrollers such as ESP32, Raspberry Pi and Arduino. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.SPECIAL INSTRUCTION:Due to the International Import and Export Policy, the corrosive solution (acid & alkaline solution) cannot be delivered by air transportation. The filling solution is not included in the kit. You have to purchase it from the local shop or deploy the solution by yourself, refer to WiKi FAQ-Q4. It can’t work without a filling solution! Please be cautious with the purchase!Note:1. The filling solution is 0.5 mol/L NaOH solution. You need to pour it into the membrane cap before use. Please be cautious with the operation because the solution is corrosive. Please wear gloves! If the solution accidentally drops onto the skin, wash your skin with plenty of water immediately.2. The oxygen permeable membrane in the membrane cap is sensitive and fragile. Be cautious when handling it. Fingernail and other sharp objects should be avoided.3. The DO sensor will consume a little oxygen during the measurement. Please gently stir the solution and let the oxygen be distributed evenly in the water.FeaturesDissolved Oxygen Probe：1. Galvanic probe, no need polarization timE2. Filling solution and membrane cap is replaceable, low maintenance costSignal Converter Board：1. 3.3~5.5V wide-range power supply, compatible with most Arduino microcontroller2. 0~3.0V analog output, compatible with all microcontrollers with ADC function.3. Gravity interface, plug, and play, easy to useSpecificationDissolved Oxygen ProbeType: Galvanic ProbeDetection Range: 0~20mg/LResponse Time: Up to 98% full response, within 90 seconds (25℃)Pressure Range: 0~50PSIElectrode Service Life: 1 year (normal use)Maintenance Period: Membrane Cap Replacement Period: 1~2 months (in muddy water); 4~5 months (in clean water) Filling Solution Replacement Period: Once every monthCable Length: 2 metersProbe Connector: BNCSignal Converter BoardOperating Voltage: 3.3~5.5VOutput Signal: 0~3.0VCable Connector: BNCSignal Connector: Gravity Analog Interface (PH2.0-3P)Dimension: 42mm * 32mmDocumentsDissolved oxygen sensor Product WIKIShipping ListGalvanic Dissolved Oxygen Probe with Membrane Cap x1Spare Membrane Cap x1Signal Converter Board x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1Plastic Dropper x2
