High Precision Voltage Tester Screwdriver for Electrical Work

• Customization: Available
• After-sales Service: Communication
• Warranty: Communication
• Model NO.: LH-MQ0.72-859
• Installation: Direct Connected
• Display: Digital
• Usage: Meter for Industry and Home Use, Standard Electric Energy Meter
• Theory: Machine-electric Type
• Power Source: AC
• DC Voltmeter Type: Electrostatic
• AC Voltmeter Type: Electric
• Customized: Non-Customized
• Name: Electric Tester Pen
• Key: Voltage Tester
• Custom: Yes
• Support: OEM /ODM
• Transport Package: Box Packaging 40 Pieces/Box, 40 Boxes
• Specification: 19m
• Trademark: lophardware
• Origin: China
• HS Code: 903033900
• Production Capacity: 5000PCS/Year
• Package Size: 20.00cm * 12.00cm * 7.00cm
• Package Gross Weight: 0.500kg

Product Description

High Precision Voltage Screwdriver Tester with Non-Slip Handle for AC Line and Electrical Wire Detection Work

Product Description

Electric Tester Pen (also called a test pen or voltage tester pen) is a portable, hand-held electrical tool widely used by electricians, maintenance workers and in industrial/hardware scenarios to detect the presence of AC voltage in electrical circuits, wires, sockets and electrical equipment. It is a basic and essential safety tool for electrical operation and fault troubleshooting.
The dual-color injection molded neon lamp voltage tester, commonly known as a voltage test pen or voltage detector, is an important handheld electrical safety tool used for preliminary verification of the presence of AC voltage in circuits, sockets, switches, and other conductive components.

Working Principle

The working principle of this tester is extremely simple, based on the principle of capacitive current:

When the tester's metal probe contacts a charged conductor, a small capacitive current is generated. This current flows sequentially through the probe, the current-limiting resistor, the neon lamp, and finally into the user's body (when the user's finger is placed on the contact pad). The user's body acts as a ground reference, forming a closed circuit. This tiny current is sufficient to ionize the gas inside the neon lamp, causing it to fluoresce.

Dual-color indicator lights are typically achieved through a dual-color neon lamp or a clever optical design. Common configurations are as follows:

Red light: Indicates the presence of a live conductor (full voltage, e.g., 110V/230V AC).

Green/Yellow light: Indicates a lower voltage or a "neutral/ground" conductor when using an independent voltage source; when testing a known live power source, it simply confirms that the circuit is functioning correctly (depending on the model design). Some models use a green indicator light during self-test to indicate that the tool is malfunctioning.

Common Types

Neon Tester Pen

The basic and most economical type, with a neon bulb inside. It judges the presence of voltage by the brightness of the neon bulb (no numerical display), suitable for detecting AC voltage of 50~500V (the mainstream voltage range for household and industrial low-voltage circuits).

Digital Tester Pen

Equipped with an LCD screen, it can directly display the measured voltage value (e.g., 220V, 36V). It supports low-voltage detection and has higher accuracy, suitable for fine circuit testing.

Non-contact Electric Tester Pen

An inductive type that does not need to touch the metal conductor. It triggers a light/sound alarm when close to a live object (usually detecting AC 90~1000V), which is fast and safe for quick fault location of wires and sockets.

Usage:

To use it, one simply places the tip on the conductor to be tested and touches the end cap with a finger. If the neon bulb lights up, voltage is present.

It is a fundamental, inexpensive, and essential tool for any basic electrical work, providing a quick and reliable first check for electrical safety.

Typical Application Scenarios

Daily inspection of household and industrial sockets, switches and wires;

Pre-operation safety confirmation of electrical equipment maintenance (confirm no electricity before construction);

Quick troubleshooting of open circuits, live wire misconnection and other faults in low-voltage electrical circuits;

Electrical safety detection in construction, fire protection and hardware installation projects.

Product Parameters

Metal Tip	For probing the test point
Resistor	A high-value resistor that limits the current to a safe, micro-level
Neon Lamp	The indicator that glows when voltage is detected
Transparent Body	Allows the user to see the glowing neon lamp
Metal Cap/Contact Plate	The point where the user places their finger to complete the circuit

Item	Details
Products Name	Voltage Tester
Function	Used to detect whether a circuit is energized, indicated by a neon bulb.
Handle design	Reinforced Rubber Grip provides a non-slip grip and a comfortable feel.
Packing	Packed in rows of 10 (10 pcs per row), suitable for bulk purchases.
Applicable Standards	It may comply with relevant electrical safety standards (such as UL, etc., specific details need to be confirmed on a product-by-product basis).
Use in	Basic voltage testing scenarios such as household circuits and appliance repair.

Detailed Photos

Company Profile

Our company is a leading manufacturer of electric tester pen and some hand tool for 20 years. We use top-grade materials to manufacture our products, ensuring they meet the highest standards of quality, durability, and reliability.

We pay great attention to detail and service to providing our customers with the best products buying possible. Our experienced engineers and technicians work closely with customers to develop customized solutions that meet their exact needs.

In terms of sales, our company emphasizes customer satisfaction and partnership. We strive to establish long-term relationships with our customers, offering competitive pricing, timely delivery, and exceptional customer service.

We believe that our products and services will meet and exceed your expectations, and we look forward to having the opportunity to work with you.

FAQ

Q1:If i'm interested in your products when can i receive your reply after the enquiry?
A:All your enquiries will be replied in 24 hours.

Q2:Can i get a sample before the order? Beacuse i don't know the quality of your products.
A:Of course! We can provide you with free samples. We think get a sample is the best way to build the trust in the two of us. Please send us an enquiry to get free samples.

Q3:Can you send me your products catalogue?
A:Sure! Please contact us online or send an Email, we will offer you our products catalogue.

Q4:Can i get your price list of your products?
A:Certainly, we can supply the price list to you. Please feel free to contact us if you have any need.

Q5:Do you accept OEM business?
A: OEM and ODM we all can accept.

Q6:How's the delivery? Because i really need them urgently.
A:Sample cost 2-3days. Bulk order cost 7-15days.

Q7:Do you test all your goods before delivery?
A:Yes,we all test it before delivery.

Q8:Do you have any quality guarantee or after-sales service?
A:Of course! All the products have 2 year warranty. If there are quality complaints, we will come up with solutions within
5days.