Process instrumentation
Tank level, pressure and flow sensor interfacing.
4-20mA Signal Systems
Industrial 4–20mA signal generator and reader design, sensor interfacing, calibration and monitoring systems.
Overview
What this service covers
Industrial 4–20mA current-loop design — signal generation, loop reading, sensor interfacing and calibration for process instrumentation and plant monitoring.
Client Problems
Problems this service solves
- A legacy 4-20mA sensor needs to interface with a modern microcontroller.
- An existing loop reader drifts or isn't calibrated correctly.
- A signal generator is needed to simulate a sensor for testing a PLC or controller.
- Signal conditioning needs to be isolated and noise-resistant on a noisy plant floor.
Capabilities
What we do
- 4-20mA signal generator and reader circuit design
- Sensor interface and calibration
- Analogue signal conditioning and isolation
- Industrial monitoring integration (RS-485/Modbus, where applicable)
- Review and correction of an existing 4-20mA circuit
Technologies
Tools & platforms
Precision current-loop ICs, isolated signal-conditioning components, and STM32/ESP32-based readout and logging.
Current-loop ICsIsolated signal conditioningSTM32 / ESP32
Development Process
How we approach a 4-20mA project
- 01Loop review
Confirm what's being measured and the existing loop setup.
- 02Circuit design
Design the generator, reader or conditioning circuit.
- 03Calibration
Calibrate the circuit against known reference values.
- 04Integration & handoff
Integrate with the existing controller and hand over documentation.
Deliverables
What you receive
- Schematics and PCB layout
- Calibration notes
- Integration and wiring documentation
Applications
Where this is used
PLC/controller testing
Signal generators for simulating sensors during commissioning.
Plant monitoring
Reliable loop reading integrated into a wider automation system.
Related Services
Often paired with
Industrial Automation Systems
The controller this signal feeds into.
PCB Design
The board carrying the signal-conditioning circuit.
Embedded Firmware Development
Firmware reading and logging the loop signal.
Discuss Your 4-20mA Project
Tell us what's being measured and what's wrong with the current setup.