GD166B Clamp Meter – 6000 Counts True RMS, AC/DC Current 60A/600A, AC Inrush, AC/DC Voltage 600V, NCV, Frequency, Capacitance, Temperature, Live Wire
GD166B True RMS Clamp Meter — 600A AC/DC Smart Auto Multimeter
The GD166B is a compact True RMS smart clamp meter designed for fast electrical diagnostics in household installations, automotive service, and maintenance work. It measures AC current up to 600A using the clamp jaw, and the GD166B version additionally supports DC current measurement with DCA zero adjustment for improved accuracy.
Alongside clamp measurements, the instrument provides full multimeter functionality for voltage, resistance, capacitance, frequency, duty cycle, and temperature testing. AC inrush current capture helps diagnose motors and compressors, while smart AUTO mode simplifies everyday operation.
A 6000-count HD color LCD with backlight ensures clear visibility, and practical features including NCV detection, live wire identification, MAX/MIN recording, flashlight, and auto shutdown make the meter suitable for field use. Powered by standard AAA batteries, it provides portable measurement capability for technicians and DIY users.
Measure AC and DC current directly from conductors.
Reliable readings in real electrical environments.
Automatic function selection for faster diagnostics.
Backlight, NCV detection, flashlight, MAX/MIN and hold.
Specifications
| Parameter | Value |
|---|---|
| Model | GD166B |
| Display | 6000 counts, HD color LCD |
| True RMS | Yes |
| Operating temperature | 0–40 °C |
| Product size | 199 × 81 × 32 mm |
| Weight | approx. 206 g (GD166B) |
| Clamp opening | 36 mm |
| Power supply | 3 × 1.5V AAA batteries |
| Battery included | No |
| Certifications | CE, FCC |
| High-concern chemicals | None |
Measurement ranges
| Function | Range |
|---|---|
| DC voltage | 600mV / 6V / 60V / 600V |
| AC voltage | 600mV / 6V / 60V / 600V |
| AC current (clamp) | 60A / 600A |
| DC current (clamp) | 60A / 600A (GD166B only) |
| AC inrush current | 60A / 600A |
| Resistance | 600Ω / 6kΩ / 60kΩ / 600kΩ / 6MΩ / 60MΩ |
| Capacitance | 6nF / 60nF / 600nF / 6µF / 60µF / 600µF / 6mF / 60mF |
| Frequency | 100Hz / 1kHz / 10kHz / 100kHz / 1MHz / 10MHz |
| Duty cycle | 1%–99% |
| Temperature | -40°C to 1000°C and -40°F to 1832°F |
Safety limit
| Parameter | Value |
|---|---|
| Max voltage between terminals and earth ground | 600V |
Functions and features
| Feature | Supported |
|---|---|
| Smart AUTO measurement | Yes |
| NCV non-contact AC voltage detection | Yes |
| Live wire detection | Yes |
| AC inrush current measurement | Yes |
| DCA zero | Yes (GD166B only) |
| MAX / MIN | Yes |
| Data hold | Yes |
| Backlight | Yes |
| Flashlight | Yes |
| Low battery indication | Yes |
| Over-range indication | OL |
| Auto power off | Yes |
Model Variants
Single model version: GD166B
Package Includes
- 1 × GD166B clamp meter
- 1 × Pair of test leads (pen cables)
- 1 × Cloth bag
- 1 × Thermocouple probe
- 1 × Manual
- 1 × Retail box