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Pricelist: Retail Price (B2C) Pricelist
PH Sensor Module with BNC Electrode Probe – High-Accuracy Liquid Quality Tester for Arduino, ESP32, and Hydroponics Automation Systems

PH Sensor Module with BNC Electrode Probe – High-Accuracy Liquid Quality Tester for Arduino, ESP32, and Hydroponics Automation Systems

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ParameterDetailed Specification
Measuring Range0.00 to 14.00 pH
Operating Voltage5.0V DC
Output TypeAnalog Voltage (Linear)
Module Accuracy$\pm$ 0.1 pH (at 25°C)
Probe ConnectorStandard BNC Interface
Operating Temperature0°C to 60°C
Price
₹ 1,423.73 ₹ 1,423.73
(Tax included)

Product Description

The PH Sensor Module with BNC Electrode Probe is a professional-grade solution for measuring the acidity or alkalinity of liquids in real-time. This comprehensive kit includes a high-sensitivity pH electrode and a signal conditioning module that converts the probe's millivolt signal into a stable analog voltage compatible with Arduino, ESP32, and Raspberry Pi. It is an indispensable tool for automated hydroponics, aquarium monitoring, and water treatment projects. The BNC connector ensures a secure, noise-free connection, while the onboard potentiometer allows for easy hardware calibration. Whether you are maintaining a delicate aquatic ecosystem or building an industrial chemical monitor in your Pimpri workshop, this sensor delivers laboratory-style accuracy at an affordable price.

Detailed Key Features

  • Standardized BNC Interface: Compatible with almost all industry-standard pH electrodes, allowing for easy probe replacement or upgrading.

  • Dual Calibration Potentiometers: Features onboard trimmers to adjust both the "Offset" (zero point) and the gain, ensuring precise readings across the 0-14 pH spectrum.

  • High-Accuracy LM393 Chipset: Utilizes a low-noise operational amplifier to stabilize the micro-volt signals from the probe before they reach your microcontroller.

  • Wide Voltage Compatibility: Designed to run primarily on 5V, providing a linear analog output that is easy to map in your code.

  • Laboratory Grade Probe: The included electrode is designed for long-term immersion in non-corrosive liquids, featuring a protective cap to keep the sensor bulb hydrated.

All Technical Details

  • Response Time: $\leq$ 1 minute for a stable reading.

  • Power Indicator: Onboard Red LED for power status verification.

  • Current Consumption: ~5-10mA.

  • Module Dimensions: 43mm x 32mm x 20mm.

  • Probe Cable Length: Approximately 60cm to 1 meter for flexible mounting.

  • Output Mapping: Typically, 2.5V represents pH 7 (Neutral) in a perfectly calibrated system.

Prototyping & Engineering Tips (Robogears Exclusive)

  • Calibration Procedure: To calibrate, dip the probe into a pH 7.0 buffer solution. Adjust the "Offset" potentiometer until your code reads exactly 7.0. Then, test with pH 4.0 or 10.0 solutions to verify the slope.

  • Storage Warning: Never let the probe bulb dry out. Always keep the protective cap filled with 3M KCl storage solution or pH 4.0 buffer when not in use. Failure to do so will permanently damage the sensing glass.

  • Electrical Isolation: If you are getting erratic readings while using other sensors (like TDS), it is likely due to "ground loops." Power the pH module from a separate, isolated power source to achieve 100% stability.

  • ADC Sensitivity: For users in Pune using ESP32 (3.3V logic), use a voltage divider or adjust your software map, as the module outputs up to 5V. We recommend using an external 16-bit ADC (like the ADS1115) for professional-grade precision.

Package Includes

  • 1 x PH Electrode Probe (BNC Connector)

  • 1 x PH Signal Processing Module

  • 1 x Analog Interface Cable

Image Disclaimer

Image shown is for illustrative purposes only; the actual product may vary slightly in PCB color or probe design due to manufacturing updates, though all technical specifications will remain as described.