Liquid pH 0-14 Sensor Module with BNC Probe for Arduino
Liquid pH 0-14 Value Detection Sensor Module with pH Electrode Probe (BNC)
The liquid pH sensor module measures pH levels from 0 to 14 using a combination electrode probe with BNC connector. It outputs an analog voltage proportional to pH, suitable for use with Arduino, ESP32, and other microcontrollers. Ideal for monitoring water quality in aquaponics, hydroponics, pools, and educational science projects.
Key Specifications
| Specification | Value |
|---|---|
| Measurement Range | 0 to 14 pH |
| Operating Voltage | 5V DC |
| Output Signal | Analog voltage (0-5V, inversely proportional) |
| Accuracy | ±0.1 pH at 25°C (after calibration) |
| Probe Connector | BNC |
| Module Dimensions | Approx. 42mm × 32mm |
What You Can Build With This
- Aquaponics pH monitoring system
- Automatic plant watering based on soil pH
- Home water quality tester with display
- DIY pH meter for science fair projects
Compatibility
This pH sensor module is compatible with any microcontroller that has an analog input, such as Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with external ADC). It operates at 5V and provides a linear output suitable for direct analog-to-digital conversion. For best results, pair with an Arduino and use the provided sample code or popular libraries like "DFRobot_PH".
Wiring Notes
Connect the module's VCC pin to 5V, GND to ground, and the analog output (often labeled Po or A) to an analog input pin (e.g., A0). To reduce noise, place a 0.1µF capacitor between VCC and GND close to the module. The BNC probe must remain dry on the connector end; only the glass bulb should be submerged.
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, it works with any Arduino board. Use an analog pin, and you can find open-source code for reading pH values.
How do I calibrate this sensor?
You'll need standard buffer solutions of pH 4.0 and 9.18. Measure the analog readings for each solution, then use the values in your code to calculate pH accurately. Calibration should be done before first use and periodically.
Can I use this for continuous monitoring?
Yes, but for long-term immersion, ensure the probe is designed for continuous use. Avoid leaving it in highly acidic or alkaline solutions for extended periods to extend electrode life.
📦 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.
What you can build with this
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