{"product_id":"liquid-ph-sensor-module-industrial-grade-for-arduino-esp32-raspberry-pi","title":"Liquid pH Sensor Module Industrial Grade for Arduino ESP32 Raspberry Pi","description":"\u003ch1\u003eLiquid pH Sensor Module (0–14 pH Range) for Arduino, ESP32, Raspberry Pi\u003c\/h1\u003e\n\n\u003cp\u003eThe Liquid pH Sensor Module is an industrial-grade analog sensor designed for precise pH measurement in liquids. It pairs with any standard pH electrode via a BNC connector and outputs a voltage proportional to the pH value, making it compatible with Arduino, ESP32, Raspberry Pi, and most microcontrollers. With onboard offset adjustment and wide detection range, it is suitable for water quality testing, hydroponics, aquaponics, and laboratory experiments.\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\u003eDetection 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 – 5 V (pH-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eBNC (probe not always included)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOffset Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer\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\u003e\u003ca href=\"\/products\/kit-hydroponics-nutrient-monitor-kit-v2\"\u003eHydroponics nutrient monitor and automatic pH adjuster\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/aquarium-water-quality-monitor-kit-with-arduino-tds-and-temp\"\u003eAquarium water quality controller with alerts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003eEnvironmental water sampling data logger with SD card storage\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIndustrial wastewater pH monitoring and recording system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any microcontroller accepting analog input, including Arduino (Uno, Mega, Nano), ESP32 (via ADC), and Raspberry Pi (with external ADC like ADS1115). It requires 5 V power and outputs a linear voltage within 0–5 V. For 3.3 V logic boards like ESP32, use a voltage divider or ensure your board's ADC can handle the full range.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module’s VCC to 5 V, GND to common ground, and the analog output (often marked Po or Out) to an analog input pin. For stable readings, allow the electrode to settle for 1–2 minutes in buffer solution before taking measurements. Use a dedicated ADC for Raspberry Pi to convert the analog signal.\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, the pH sensor module outputs 0–5 V analog, which connects directly to any Arduino analog pin for pH reading using simple code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate this sensor?\u003c\/summary\u003e\u003cp\u003eImmerse the pH electrode in standard buffer solutions (e.g., pH 4.0 and pH 7.0) and adjust the onboard offset potentiometer until the output matches the expected voltage for each buffer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it include the pH electrode?\u003c\/summary\u003e\u003cp\u003eThis listing is for the signal conditioning module only. A standard BNC-connector pH electrode is required and must be purchased separately unless specified as a kit.\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":53444962091373,"sku":"CDN-0427","price":790.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_408c613f-5407-4e29-a1ae-da2773e6db11.jpg?v=1781512559","url":"https:\/\/compoden.com\/products\/liquid-ph-sensor-module-industrial-grade-for-arduino-esp32-raspberry-pi","provider":"Compoden","version":"1.0","type":"link"}