Liquid pH Sensor Module Industrial Grade for Arduino ESP32 Raspberry Pi
Liquid pH Sensor Module (0–14 pH Range) for Arduino, ESP32, Raspberry Pi
The 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.
Key Specifications
| Specification | Value |
|---|---|
| Detection Range | 0 – 14 pH |
| Accuracy | ±0.1 pH (at 25°C) |
| Output Signal | Analog 0 – 5 V (pH-dependent) |
| Power Supply | 5 V DC |
| Connector | BNC (probe not always included) |
| Offset Adjustment | Onboard potentiometer |
What You Can Build With This
- Hydroponics nutrient monitor and automatic pH adjuster
- Aquarium water quality controller with alerts
- Environmental water sampling data logger with SD card storage
- Industrial wastewater pH monitoring and recording system
Compatibility
This 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.
Wiring Notes
Connect 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.
Why Buy from Compoden
Every 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.
Is this compatible with Arduino?
Yes, the pH sensor module outputs 0–5 V analog, which connects directly to any Arduino analog pin for pH reading using simple code.
How do I calibrate this sensor?
Immerse 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.
Does it include the pH electrode?
This 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.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items