SKU: SENS-3102
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DFRobot Gravity Analog pH Sensor for Arduino - BNC Connector, 0-14pH Range

₹3,099.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Gravity Analog pH Sensor is a ready-to-use module for Arduino and other 5V microcontrollers, providing a 0-14pH measurement range with ±0.1pH accuracy at 25°C. It features a standard BNC connector for probe attachment and a PH2.0 interface for direct analog input connection.

Features

  • Measures pH from 0 to 14 with ±0.1pH accuracy at 25°C.
  • Gravity-series PH2.0 interface for plug-and-play connection to Arduino analog pins.
  • Standard BNC connector for compatibility with common pH electrode probes.
  • On-board power indicator LED and gain adjustment potentiometer for signal calibration.
  • Compact module dimensions of 43 x 32mm for easy integration into projects.

Out of stock

Description

This analog pH sensor module translates the electrode’s millivolt output into a stable 0-5V analog signal compatible with standard microcontroller ADCs. The integrated signal conditioning circuit ensures reliable readings for aqueous solutions within a 0-60°C operating range. The module is designed for straightforward integration into water quality monitoring systems, aquaponics, and educational projects.

Its robust BNC connection provides a secure interface for standard glass-body pH electrodes, while the on-board potentiometer allows for precise calibration against known buffer solutions. The module operates on a single 5V DC supply, making it compatible with Arduino Uno, Mega, and other 5V logic development boards without requiring additional level shifting.

Key Features

  • High-precision pH measurement with ±0.1pH accuracy under standard conditions.
  • Gravity-series standardized connector (PH2.0) for foolproof wiring with Arduino.
  • Integrated BNC connector ensures reliable and secure probe attachment.
  • On-board calibration potentiometer for fine-tuning sensor output against reference solutions.
  • Wide operating temperature range from 0°C to 60°C for various environmental applications.
  • Compact and durable PCB design with a power indicator LED for operational status.
  • Optimized performance-to-cost ratio for hobbyist, educational, and prototyping use.

Applications

  • Water quality monitoring and testing stations for aquariums and hydroponics.
  • Educational science projects and environmental data logging with Arduino.
  • Aquaculture and aquaponics system health monitoring and control.
  • Laboratory prototyping and chemical process monitoring for hobbyist applications.
  • Soil pH analysis in precision agriculture and gardening projects.

Technical Specifications

Operating Voltage5 VDC
Measuring Range0 - 14 pH
Accuracy± 0.1 pH (at 25°C)
Operating Temperature0°C to +60°C
Response Time≤ 1 minute
Output SignalAnalog (0-5V)
Connector TypeBNC (for probe), PH2.0 (for controller)
Module Dimensions (L x W)43 mm x 32 mm
Module Weight68 g

Frequently Asked Questions

What is the operating voltage for this pH sensor module?

The module requires a 5V DC power supply. It is designed to be powered directly from the 5V pin of an Arduino or other compatible microcontroller. The analog output signal is also referenced to this 5V supply, providing a 0-5V range corresponding to the 0-14pH measurement scale.

How do I connect the pH sensor to my Arduino?

Connection is straightforward using the Gravity-series PH2.0 interface cable. Connect the module's PH2.0 connector to your Arduino: Red wire to 5V, Black wire to GND, and Blue (or signal) wire to an analog input pin (e.g., A0). The pH electrode itself connects to the module via the standard BNC connector.

How do I calibrate the sensor for accurate readings?

Calibration requires pH buffer solutions (typically pH 4.0, 7.0, and 10.0). Immerse the connected electrode in a buffer, read the raw analog value from your Arduino, and use the on-board potentiometer to adjust the output until it matches the expected value for that buffer. Most Arduino code libraries provide calibration functions to map the analog reading to the correct pH value.

What type of pH electrode is compatible with this module?

The module features a standard BNC connector, which is compatible with the vast majority of Generic glass-body pH electrodes and combination probes available on the market. Ensure the electrode cable has a male BNC plug for a secure connection.

What is the response time and operating temperature range?

The sensor has a response time of less than one minute to reach a stable reading. It is designed to operate with solutions in a temperature range of 0°C to 60°C. Note that pH measurement accuracy is specified at 25°C; temperature compensation may be required for precise measurements outside this range.

Package Includes

  • 1 x DFRobot Gravity Analog pH Sensor Module

Additional Information

Weight 0.068 kg
Dimensions 4.3 × 3.2 cm