- Voltage Detection Range: Dual-range: 12-1000V AC (high sensitivity) or 48-1000V AC (low sensitivity)
- Detection Type: Non-contact (inductive sensing via pen tip)
- Safety Ratings: CAT III 1000V / CAT IV 600V; CE certified; Double insulation
- Alarm Indicators: LED lights (red for detection, orange for high sensitivity mode), buzzer sound, and vibration
- Additional Features: LED flashlight for low-light use; Auto shut-off after 15 minutes of inactivity; Low battery indicator
- Power Source: 2 x AAA 1.5V batteries (not included)
- 7 Days replacement warranty
Key Specifications
Here’s a summary of the technical specifications for the Mestek AC40:
| Specification | Details |
| Voltage Detection Range | Dual-range: 12-1000V AC (high sensitivity) or 48-1000V AC (low sensitivity) |
| Detection Type | Non-contact (inductive sensing via pen tip) |
| Safety Ratings | CAT III 1000V / CAT IV 600V; CE certified; Double insulation |
| Alarm Indicators | LED lights (red for detection, orange for high sensitivity mode), buzzer sound, and vibration |
| Additional Features | LED flashlight for low-light use; Auto shut-off after 15 minutes of inactivity; Low battery indicator |
| Power Source | 2 x AAA 1.5V batteries (not included) |
| Dimensions | Approximately 160 x 28 x 20 mm (6.3 x 1.1 x 0.8 inches) |
| Weight | About 46g (1.6 oz) – lightweight and pocket-sized |
| Durability | IP67 waterproof and dustproof; Drop-resistant up to 2 meters |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
Features and Functionality
The Mestek AC40 stands out for its user-friendly design and practical features tailored for real-world electrical work
Dual Sensitivity Modes
- Low Sensitivity (48–1000V AC): Default mode with red LED indicator. Best for household wiring, outlets, and high-voltage circuits to reduce false positives.
- High Sensitivity (12–1000V AC): Activated via range button (orange LED indicator). Ideal for detecting low-voltage sources like doorbells, thermostats, power strips, or irrigation systems.
Multi-Mode Alarms
- Bright red flashing LEDs (intensity varies with voltage strength: low, medium, high).
- Audible buzzer (traffic-light style: short beeps for low voltage, continuous for high).
- Vibration feedback for noisy environments.
Built-in Flashlight
- Integrated LED light for illuminating dark panels, under-sink areas, or tight spaces.
Live/Null Wire Detection
- Differentiates live wires from neutral/ground lines.
- Identifies wire breakpoints by scanning along cables.
Ergonomic Design
- Slim pen shape with pocket clip for portability.
- Soft-touch button and non-slip grip for one-handed operation, even with gloves.
Self-Test Function
- Green LED confirms functionality at power-on.
- Battery-low warning prevents unexpected failures.
Examples of Video Usage YouTube :
[youtube]https://www.youtube.com/watch?v=9-tmV04qtDA[/youtube]
