LY86D Digital Voltage Tester Screwdriver | LCD Non-Contact AC Detector
LY86D Digital Voltage Tester Screwdriver | LCD Non-Contact AC Detector
LAOLAU LY86D Digital Voltage Tester Screwdriver Pen – LCD Display, Non-Contact AC Detection & Circuit Breakpoint Finder
The LAOLAU LY86D is the ultimate multi-function electric pen for electricians, maintenance professionals, and DIY enthusiasts. Combining a digital LCD voltmeter, non-contact AC voltage detector, circuit breakpoint finder, and a dual-head screwdriver into one compact tool, the LY86D lets you measure, test, and fasten — all without switching tools. Made in Mainland China.
Key Features
- Non-Contact Voltage Detection: Simply bring the pen tip near a wire or outlet — the green LED lights up to indicate the presence of an AC voltage field without touching any live conductor. No direct contact required for early hazard awareness.
- Live / Neutral Line Identification: Touch the screwdriver tip to a wire terminal — a green light only indicates a neutral or ground line; red and green lights flashing together (plus audible buzzer above 70V) indicates a live line. Clear, instant visual and audible feedback.
- Circuit Breakpoint Locator: Slide the pen along an insulated wire — the LCD voltage reading drops to zero precisely at the break location, helping you pinpoint faults quickly without guesswork.
- Digital LCD Display: Reads AC voltages from 12V to 250V in real time, so you always know the exact voltage level before working on any circuit.
- Dual Screwdriver Head: Choose from a Phillips/Cross head (magnetic tip for small screws on circuit boards, sockets, and smartphones) or a Flat head (non-slip bite for home appliances, switches, and rusted fasteners). Chrome Vanadium Steel construction for durability.
- CE, RoHS & UL Certified: Meets internationally recognized safety and environmental standards.
- Battery Included: Powered by 3× AG13/LR44 button cell batteries (included) — ready to use out of the box.
Specifications
| Model | LY86D |
| Measuring Voltage | AC 12V – AC 250V |
| Input Voltage (non-contact) | <50V AC / 75V DC |
| Material | ABS + Chrome Vanadium Steel |
| Power Supply | 3× AG13/LR44 button cell batteries (included) |
| Operating Temperature | 0°C – 40°C |
| Storage Temperature | -10°C – 50°C |
| Operating Humidity | Up to 95% RH |
| Certifications | CE, RoHS, UL |
| Country of Origin | Made in Mainland China |
Who Needs This Tool?
- Homeowners: Quickly identify which outlet or breaker is involved when a circuit trips — no extra tools needed.
- Electricians & Technicians: Detect voltage and confirm line status before starting any installation or repair work.
- Appliance Repair Pros: Measure power levels while simultaneously removing screws — no more tool-switching mid-job.
- Electronics & DIY Builders: Assemble smart home devices, drones, or circuit boards with precision using the magnetic cross-head tip.
- HVAC & Industrial Maintenance: Verify wire status in panels and equipment for safer, faster service.
Important Safety Instructions
- Visually inspect the pen housing for cracks, damage, or moisture before each use.
- Perform a self-test before use: hold the screwdriver in one hand and touch the electrode with the other — the green light should illuminate.
- Test on a known live source to confirm proper operation before beginning work.
- Never touch the metal tip with bare hands while using the voltage measurement function.
- Do not apply voltages exceeding the rated maximum. Exercise caution above 30V AC.
- Always comply with local and national electrical safety regulations and use appropriate personal protective equipment.
Battery Replacement
If the green indicator does not light during self-test, the batteries may need replacement. Replace with 3× AG13/LR44 button cells, observing the polarity markings on the circuit board.
For general electrical safety guidelines, visit the U.S. Consumer Product Safety Commission – Electrical Safety.
Learn more: Test light
Frequently Asked Questions
Q: What voltage range can the LY86D digital voltage tester measure?
A: The LY86D measures AC voltages from 12V to 250V, making it suitable for standard household outlets (110V/120V and 220V/230V/240V) as well as lower-voltage circuits. The non-contact detection threshold is under 50V AC / 75V DC.
Q: How does the circuit breakpoint detection feature work on the LY86D?
A: Slide the pen tip slowly along the length of an insulated wire that is connected to power. The LCD will display the induced voltage reading as you move. The exact point where the reading suddenly drops to zero is the location of the wire break or fault — no need to strip insulation or guess.
Q: What is the difference between the flat head and Phillips/cross head screwdriver versions?
A: The Phillips/cross head version features a strong magnetic tip ideal for small screws found in smartphones, circuit boards, and electrical sockets. The flat head version has a non-slip blade designed for home appliances, light switches, and fasteners that may be corroded or tight — perfect for getting a firm grip.
Q: Does the LY86D require batteries, and are they included?
A: Yes, the LY86D is powered by 3× AG13/LR44 button cell batteries, which are included in the package. The tool is ready to use immediately upon unboxing.
Q: Is the LY86D safe to use around energized circuits?
A: Yes, when used correctly. The non-contact detection mode does not require touching live conductors. Always follow the safety instructions provided: inspect the pen before use, perform a self-test, and never touch the metal tip with bare hands while in voltage-measurement mode. Always observe local electrical safety regulations.