High-Precision Programmable Multifunction Signal Generator

Description

The SG004A is a multifunction signal generator designed for anyone working every day in industrial automation, maintenance and testing. Housed in a compact, rugged body, it combines accuracy, portability and a complete set of functions built for simulating, diagnosing and calibrating electronic and control systems.

The unit has a 2.4-inch colour display for clear, immediate reading of values, settings and the graph of the signal over time. The interface is designed to be intuitive, letting the user switch quickly between output and input modes without wading through complicated menus. The real-time curve, with recording of up to 100,000 data points or 15 complete sets, is a real bonus for anyone who has to analyse slow or fast signal variations during testing.

The SG004A supports a wide range of signals: voltage from 0 to 24 V, current 0–24 mA in active or passive mode, frequency/PWM from 1 to 9999 Hz, plus reading and simulation of thermocouples and RTDs. This versatility makes it suitable for PLC debugging, sensor simulation, actuator adjustment, positioner testing, calibration of analogue and digital instruments and checks during industrial plant maintenance.

With a maximum error of ±0.2%, the unit is accurate enough for reliable adjustment even in applications that demand high accuracy. The output can be set to rising, falling or cyclic mode, making it a flexible tool for repetitive tests and automated simulations. It can also work in engineering units, which is very handy for quickly interpreting the quantities converted by transducers and sensors.

On the power side, the SG004A has a built-in 3000 mAh lithium battery giving up to 24 hours of standby, which makes it perfect for field work. It charges over USB-C with 5–12 V support, so it can also be powered from a power bank or a fast charger.

Its very small footprint — just 112 × 82 × 27 mm — and its very light weight make it easy to carry and to use in tight spaces such as electrical panels, control cabinets or mobile test stations. The unit also supports Modbus communication and firmware updates via USB emulation.

The SG004A is a complete instrument combining accuracy, ruggedness and ease of use. ideal for technicians, integrators and automation professionals who want a powerful, portable signal generator able to replace several instruments with a single compact solution.

Signal Generator with 0–24 V / 0–24 mA I/O

Signal Generator with Extended Standby and High Accuracy

Compact signal generator supporting 0–24 V and 4–20 mA, in a portable body with quick controls.
It offers high accuracy, long operating autonomy and a clear display for monitoring input and output in real time.
Ideal for field testing and calibration.

Advanced Monitoring with Recording of Up to 100,000 Points

Real-time graphical display with recording of up to 100,000 points or 15 complete sets.
The curve lets you analyse in detail how the signals behave, making diagnostics, simulation and checks easier in industry and maintenance.

Colour TFT Display with Adjustable Brightness

2.4″ colour TFT display with adjustable backlight for sharp reading in any environment.
Semi-transparent buttons change colour according to the selected mode, improving visibility and usability during setup, simulation and measurement.

Buttons, Input/Output Ports and Indicators

It includes dedicated output and input terminals, supporting up to 24 V.
The control panel offers clear function keys for setup, navigation, confirmation and parameter adjustment.
There is also a status indicator and a 2.4″ TFT display for intuitive operation.

Ideal for PLC, DCS, Instrumentation and Control

It supports PLC and DCS system debugging, valve positioner adjustment, process instrument calibration and inverter testing.
A single instrument for simulating and checking industrial signals across the main automation, maintenance and control applications.

Instrument-Grade Accuracy on Process Inputs and Outputs

It allows accurate testing of current, voltage, millivolt and resistance inputs and outputs, as well as generation of programmable waveforms and speed tests.
It guarantees high accuracy in signal simulation and measurement, ideal for laboratory testing and industrial automation.

Complete Functions for Industrial Measurement and Simulation

It supports resistance output with instrument-grade accuracy, millivolt signal generation and dynamic tests such as rotation speed and programmable waveforms.
Ideal for process checks, simulations and advanced debugging in industry and the laboratory.