Elecrow Crowtail pH Sensor Module 2.0 | Analog pH Meter for Arduino
Elecrow Crowtail pH Sensor Module 2.0 | Analog 0-14 pH Meter
The 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.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 5V DC |
| Measurement Range | 0 - 14 pH |
| Accuracy | ±0.1 pH (at 25°C) |
| Output Signal | Analog (0-5V) |
| Connector | BNC for probe, Crowtail 4-pin interface |
| Module Dimensions | 42mm x 32mm x 20mm |
What You Can Build With This
- DIY pH meter for aquarium or hydroponic nutrient solution monitoring
- Automated water quality monitoring system with data logging
- Science fair project to test acidity of household liquids
- Smart greenhouse controller with real-time soil pH measurement (using soil slurry)
Compatibility
This 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.
Wiring Notes
Connect 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.
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 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.
How do I calibrate the pH sensor?
The 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.
Does the module include the pH probe?
Yes, 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.
📦 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