{"product_id":"elecrow-crowtail-ph-sensor-module-20-analog-ph-meter-for-arduino","title":"Elecrow Crowtail pH Sensor Module 2.0 | Analog pH Meter for Arduino","description":"\u003ch1\u003eElecrow Crowtail pH Sensor Module 2.0 | Analog 0-14 pH Meter\u003c\/h1\u003e\n\n\u003cp\u003eThe Elecrow Crowtail pH Sensor Module 2.0 is a precise analog sensor designed to measure the pH level of liquids in your Arduino, Raspberry Pi, or microcontroller projects. It works with any standard pH probe (BNC connector) and outputs a voltage proportional to the pH, allowing easy integration into water quality monitors, hydroponics systems, and laboratory experiments. The module features a Crowtail 4-pin interface for plug-and-play connection, eliminating the need for soldering.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 - 14 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH (at 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog (0-5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eBNC for probe, Crowtail 4-pin interface\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e42mm x 32mm x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY pH meter for aquarium or hydroponic nutrient solution monitoring\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-water-quality-monitoring-kit-tds-ph-and-turbidity-sensor\"\u003eAutomated water quality monitoring system with data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eScience fair project to test acidity of household liquids\u003c\/li\u003e\n  \u003cli\u003eSmart greenhouse controller with real-time soil pH measurement (using soil slurry)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works seamlessly with Arduino UNO, Mega, and Nano boards using an analog input pin. It also pairs with Raspberry Pi through an ADC (like the Crowtail ADC module) or an MCP3008 for analog-to-digital conversion. The Crowtail interface is mechanically and electrically compatible with Seeed Studio Grove connectors.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module's VCC to 5V, GND to ground, and the analog output (SIG) to an analog pin on your microcontroller. The BNC connector attaches securely to the included pH probe; ensure the probe is stored in storage solution when not in use. For stable readings, allow a 60-second warmup after powering.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it outputs 0-5V analog signal directly readable by any Arduino board's analog input pins. No additional libraries are required; simply read the voltage and convert to pH using a linear formula or calibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the pH sensor?\u003c\/summary\u003e\u003cp\u003eThe module requires a two-point calibration using standard buffer solutions (typically pH 4.0 and pH 7.0). Adjust the offset and slope by comparing raw ADC readings with known pH values, then apply the calibration in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the module include the pH probe?\u003c\/summary\u003e\u003cp\u003eYes, the Elecrow Crowtail pH Sensor Module 2.0 kit includes a standard pH probe with a BNC connector, a protective storage cap, and the interface board. You'll need to purchase buffer solutions separately for calibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444953538925,"sku":"CDN-0220","price":1620.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ab7486bc-d9a1-4e0c-a4c0-ea4b78041634.jpg?v=1781512306","url":"https:\/\/compoden.com\/products\/elecrow-crowtail-ph-sensor-module-20-analog-ph-meter-for-arduino","provider":"Compoden","version":"1.0","type":"link"}