{"title":"Gravity: Analog pH Sensor/Meter Kit V2","handle":"gravity-analog-ph-sensor-meter-kit-v2","url":"/products/gravity-analog-ph-sensor-meter-kit-v2","description":"The Gravity Analog pH Sensor/Meter Kit V2 is designed to measure the pH of liquids, indicating acidity or alkalinity on a scale of 0–14. It's commonly used in aquaponics, aquaculture, hydroponics, and environmental water testing. The kit includes a laboratory-grade pH probe, a signal conversion board, calibration buffer solutions, and a Gravity analogue sensor cable — ready to use with Arduino and other microcontrollers.\n\nThis V2 version features a wide-voltage onboard regulator (3.3–5.5 V), hardware-filtered output for low signal jitter, and a software library with two-point calibration that automatically identifies pH 4.0 and pH 7.0 standard buffer solutions.\n\nKey Features\n\n\n3.3–5.5 V Wide Voltage Input – Compatible with both 3.3 V and 5 V controllers\n\nHardware-Filtered Output – Low jitter for stable readings\n\nTwo-Point Auto-Calibration – Software library identifies pH 4.0 and 7.0 buffers automatically\n\nPlug-and-Play – Gravity connector and BNC probe connector, no soldering required\n\nMeasurement Accuracy – ±0.1 pH @ 25 °C\n\n\nSpecifications\nSignal Conversion Board (V2)\n\n\nSupply Voltage – 3.3–5.5 V\n\nOutput Voltage – 0–3.0 V\n\nProbe Connector – BNC\n\nSignal Connector – PH2.0-3P (Gravity)\n\nAccuracy – ±0.1 @ 25 °C\n\nDimensions – 42 × 32 mm\n\n\npH Probe\n\n\nType – Laboratory grade\n\nDetection Range – pH 0–14\n\nTemperature Range – 5–60 °C\n\nZero Point – pH 7 ±0.5\n\nResponse Time – <2 min\n\nInternal Resistance – <250 MΩ\n\nProbe Life – >6 months (depending on usage frequency)\n\nCable Length – 1 m\n\n\nIdeal For\n\nAquaponics and hydroponics monitoring\nAquaculture water quality testing\nEnvironmental and water treatment analysis\nDIY multi-parameter water quality meters\n\n\n\nNote: Keep the BNC connector and signal conversion board dry and clean to maintain input impedance accuracy. Mount the board on nylon standoffs (included) rather than placing it directly on wet or conductive surfaces. Do not leave the probe connected to the board without power for extended periods. Handle the glass sensing tip with care — scratches or damage will cause the electrode to fail.\n\n\nResources\n\nProduct Wiki\n\n\nPackage Contents\n\n1× pH Probe (laboratory grade)\n1× pH Signal Conversion Board (V2)\n1× Gravity Analogue Sensor Cable\n2× pH 4.0 Standard Buffer Solution sachets\n2× pH 7.0 Standard Buffer Solution sachets\n2× Waterproof gaskets\n1× BNC connector screw cap\n4× M3 × 10 mm nylon standoffs\n8× M3 × 5 mm screws\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":7307,"title":"Default Title","sku":"DF-SEN0161-V2","price":70.72,"on_sale":false,"in_stock":true,"available_quantity":855,"option1":"Default Title"}]}