DFRobot Gravity Analog Current to Voltage Converter for 4–20mA Applications – SEN0262

The DFRobot Gravity Analog Current to Voltage Converter (SEN0262) is a high-precision signal conversion module designed to interface industrial 4–20mA current-output sensors with microcontrollers and control boards. It converts 0–25mA DC current signals into 0–3V analog voltage signals, enabling easy monitoring and processing of industrial sensor measurements.

Designed for industrial automation, process control, and sensor interfacing applications, this module features a 0.1% high-precision sense resistor and an ultra-low-noise, rail-to-rail, zero-drift operational amplifier for reliable signal conversion without manual calibration.

Its extended 0–25mA measurement range supports fault detection for signals below 4mA and overrange detection for signals above 20mA. Operating from a 3.3V to 5.5V DC power supply, the converter integrates with Arduino and other microcontroller platforms that support analog voltage measurements.

The compact 30 × 22mm PCB and PH2.0-3P connector make it suitable for industrial sensor monitoring, embedded systems, data acquisition, and automation projects.

Key Features

• Current-to-Voltage Conversion: Linearly converts 0–25mA DC current signals into 0–3V analog voltage output.

• 4–20mA Industrial Sensor Compatibility: Designed for connecting current-loop sensors with analog-input control boards.

• Wide Measurement Range: Supports 0–25mA input for standard monitoring, fault diagnosis, and overrange detection.

• High-Precision Components: Uses a 0.1% precision sense resistor for accurate current measurements.

• Zero-Drift Operational Amplifier: Features an ultra-low-noise, rail-to-rail amplifier for stable signal conversion.

• Wide Operating Voltage: Supports 3.3V–5.5V DC power supply.

• High Measurement Accuracy: Achieves ±0.5% full-scale accuracy with a 16-bit ADC and ±2% full-scale accuracy with a 10-bit ADC.

• No Manual Calibration Required: Designed for straightforward installation and operation.

• Analog Voltage Output: Easily interfaces with compatible microcontroller ADC inputs.

• Compact PCB Design: Measures only 30 × 22mm for space-efficient integration.

Technical Specifications

Applications

• Industrial Sensor Interfacing: Connect 4–20mA current-output sensors to microcontroller ADC inputs.

• Industrial Automation: Monitor and process analog signals in automated control systems.

• Process Monitoring: Interface suitable pressure, temperature, flow, and level transmitters.

• Fault Detection Systems: Identify below-range current signals for diagnostic applications.

• Overrange Monitoring: Detect sensor output currents exceeding the standard 20mA range.

• Data Acquisition Systems: Convert industrial current signals for analog-to-digital measurement.

• Arduino Projects: Integrate industrial 4–20mA sensors with Arduino-based monitoring systems.

• Embedded Control Systems: Develop compact signal acquisition and monitoring devices.

Package Includes

• 1 × Gravity Analog Current to Voltage Converter Module

• 1 × 3-Pin Digital Sensor Cable

Additional Information

The converter produces a linear analog voltage proportional to the input current. For improved measurement accuracy, a 12-bit or higher-resolution ADC is recommended.

Note: This module converts current-loop signals into analog voltage. It does not directly provide a digital communication interface or galvanic isolation. Ensure the connected control board's ADC supports the output voltage range.