FNIRSI SG004A Signal Generator 4-20mA

The FNIRSI SG-004A is a handheld process signal calibrator. It outputs and reads multiple signals: current, voltage, frequency/PWM, mV, thermocouple and thermal resistance. It has a 3000mAh battery for 24h standby, Type-C charging, 2.4-inch LCD, anti-drop and non-slip housing.It supports real-time curve, preset output, history records and firmware upgrade. Suitable for PLC, DCS, valve positioner, transmitter and inverter on-site debugging.

Key Features

• Multi-signal Support: Current, Voltage, Frequency/PWM, mV, Thermocouple (TC-S/B/E/K/R/J/T/N/Wre3/25,Wre5/26), PT100, Cu50 thermal resistance

• High Precision Calibration: High accuracy & fine resolution, ideal for industrial instrument calibration and signal simulation

• Handheld Portable Design: Compact size 8227112mm, only 167g, easy to carry for on-site debugging

• 3000mAh Built-in Battery: 24 hours super long standby, screen real-time battery percentage display

• Type-C Charging: 5V-12V 10W max input, convenient charging

• Rugged Anti-drop Structure: ABS hard shell + elastic silicone surround protection, anti-slip silicone stripes

• Rich Extended Functions: Program automatic lift output, linear conversion output, real-time curve, history record, timing output, USB communication & firmware upgrade

• Wide Application: PLC system debugging, DCS simulation, valve positioner adjustment, instrument calibration, inverter detection

FAQ

Q: What signals can FNIRSI SG-004A generate?

A: It supports current, voltage, frequency/PWM, millivolt, multiple thermocouple types and thermal resistance (PT100, Cu50) signals, covering 0-24mA / 0-24V common industrial signals.

Q: What is the main application of this signal generator?

A: It is used for PLC & DCS debugging, valve positioner adjustment, pressure/temperature transmitter calibration and inverter testing in industrial control.

Q: How long is the standby time?

A: Built-in 3000mAh lithium battery, supports up to 24 hours continuous standby. The screen shows remaining battery power.

Q: What charging port does it use?

A: It adopts Type‑C interface, supports 5V-12V 10W max charging.

Q: Is it drop-resistant for field work?

A: Yes. It uses ABS hard shell with elastic silicone surrounding protection, plus non-slip silicone stripes for stable grip.

Q: Does it support real-time curve display?

A: Yes, it has real-time curve monitoring, preset output, history record and USB firmware upgrade functions.

Q: What is the package included?

A: SG-004A signal generator, Type-C cable, 4 alligator test clips, USB charger and user manua