Liquid pH 0-14 Value Detection Regulator Sensor Module
= High-Precision pH Meter for Arduino and Water Quality Monitoring =
This pH sensor module is a high-performance tool for measuring the acidity or alkalinity (pH) of aqueous solutions . It provides a complete solution for water quality monitoring, hydroponics, and aquarium control projects, delivering reliable analog output for seamless integration with microcontrollers .
Measures full pH 014 range Suitable for a wide range of liquids from acidic to alkaline .
Easy integration with Arduino and ESP32 - Analog output connects directly to analog input pins .
Operating voltage: 5±0.2V DC with 5-10mA current .
Output: Analog voltage signal (0-5V) proportional to pH value .
Regular calibration using standard buffer solutions (pH 4.0, 7.0, 10.0) ensures accurate readings .
The pH probe's glass bulb is fragile - avoid contact with hard objects .
= Technical Specifications =
| Parameter | Value |
|---|
| -- | -- |
| Detection Range | pH 0-14 |
| Operating Voltage | 5 ± 0.2V DC |
| Operating Current | 5-10mA |
| Temperature Range (Probe) | 0-80°C |
| Response Time | ≤ 5 seconds |
| Stability Time | ≤ 60 seconds |
| Power Consumption | ≤ 0.5W |
| Module Size | 42mm x 32mm x 20mm |
Key Features
+Accurate pH value detection from 0 to 14 in various liquids
+Analog signal output suitable for Arduino, ESP32, and Raspberry Pi
+Onboard potentiometer for calibration adjustment
+LED power indicator and BNC connector for pH probe
+Compact design with 4 M3 mounting holes for easy installation
+Fast response time under 5 seconds for efficient monitoring
== Applications ==
- Water quality monitoring and analysis systems
- Aquarium and hydroponic pH control
- Environmental and laboratory research
- Industrial process monitoring
- Educational electronics experiments
Durable and Reliable Designed for longterm use in various monitoring setups .
UserFriendly Setup Simple connection and calibration process suitable for beginners and professionals .
√ Includes pH electrode probe with BNC interface for easy connection .
√ Compatible with Arduino IDE and DFRobot_PH library for quick integration .
√ Temperature compensation possible when paired with a temperature sensor .
= Calibration Instructions =
For first use or after extended periods, calibration is essential :
- Prepare standard buffer solutions (pH 4.0 and pH 7.0) .
- Upload the sample code to your Arduino board .
- Wash the probe with distilled water and gently dry it .
- Insert the probe into pH 7.0 buffer, stir gently, wait for values to stabilize.
- In Serial Monitor, enter
enterph to enter calibration mode . - Enter
calph to start calibration - the program automatically identifies the buffer . - Enter
exitph to save parameters and exit calibration mode . - Repeat steps 3-7 with pH 4.0 buffer for second calibration point .
After completing two-point calibration, the sensor is ready for accurate measurements .
Calibration saves to the EEPROM, so it persists across power cycles .
= Troubleshooting =
Inaccurate readings:
- Wash the probe with distilled water between measurements to prevent cross-contamination .
- Ensure the BNC connector and signal board remain clean and dry .
- Recalibrate using fresh buffer solutions .
Slow response or unstable readings:
- Check for debris on the glass bulb .
- The probe may need rehydration - soak in storage solution or pH 4.0 buffer for several hours .
- If the probe dries out, soak it in 3M KCl solution for 8 hours .