Voltage Testers

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3 Phase Digital AC Voltage Tester

SISCO-VT-TH100P

A 3-phase digital AC voltage tester is a specialized tool designed for measuring and analyzing voltage in three-phase electrical systems. This non-contact voltage detector with 12-1000V AC measuring voltage, 50/60 Hz frequency. The three-phase AC voltage tester can ensure proper phase balance and sequence in industrial and commercial settings.

$51.54

Contact AC Voltage Tester, 12V-300V

SISCO-VT-HT89

Good price contact AC voltage for sale online. The AC voltage tester pen with a measuring voltage of 12V-300V, you can easily distinguish the live and null wire through different levels of alarm sound and LED indicator.

$46.77

Contactless AC Voltage Detector for Home Use

SISCO-VT-T02A

Buy a contactless AC voltage detector from SISCO. The non-contact voltage tester with the measuring voltage of high sensitivity of AC 12-1000V, low sensitivity of AC 48-1000V, 50/60 Hz frequency. The NCVT tester is ideal for electricians and home use to detect the presence of AC voltage.

$44.66

Multifunction AC Voltage Tester for Electricians

SISCO-VT-TH90

High-performance multifunctional AC voltage tester with AC voltage NCV induction probe, with a high sensitivity of 48-1000V and low sensitivity of 12-1000V dual-mode adjustable voltage sensitivity detection range. The voltage tester pen is suitable for electricians and home users.

$40.99

No Contact AC Voltage Tester Pen

SISCO-VT-TH100

Economical AC voltage tester pen featuring a 12V-1000V measuring voltage, 50/60 Hz frequency. The pen-type voltage tester detects voltage in a no-contact way, so do not worry about there could be any possibility of being shocked by the electricity.

$45.08

Non Contact AC Voltage Tester, 12V-1000V

SISCO-VT-OVT-10

Good non-contact AC voltage tester comes with a measuring voltage of high sensitivity of AC 12-1000V, low sensitivity of AC 48-1000V, 50/60 Hz frequency. The contactless AC voltage detector is ideal for breakpoint test which is handy circuit tester for electricians, homeowners.

$45.38

A voltage tester is a fundamental electrical tool used to determine the presence of voltage in a circuit or electrical component. It helps identify whether a wire, outlet, or device is live, indicating whether it is carrying current. The voltage tester pen design is compact and easy to use, a voltage tester is a critical tool for maintaining electrical safety in any setting.

SISCO is available in various forms from simple contact testers to non-contact digital voltage detectors for your needs. The electric voltage tester built-in flashlight which can work in the dark. The NCVT tester are essential for safely troubleshooting and verifying electrical installations. They are widely used by electricians, technicians, and DIY enthusiasts to ensure circuits are de-energized before performing work, thereby reducing the risk of electrical shock.

Voltage tester working principle

Voltage testers typically employ inductive or contact-based detection principles. When the probe touches or approaches a live conductor, the internal sensing circuit detects the electric field or current signal. This signal is then amplified and processed electronically, causing an indicator light to illuminate, a buzzer to sound, or a value to be displayed on the screen, thus indicating the presence of voltage in the circuit.

Electric voltage tester usage method

To use the voltage detector, touch the probe to the socket, wire, or terminal to be tested, or bring it close to the wire being tested (for non-contact types). If the voltage checker's indicator light illuminates or emits a sound, it indicates that the circuit is live; no reaction means there is no voltage or the voltage is below the detection range. Before testing, ensure the electrical tester tool is functioning correctly, and during operation, ensure your hands are insulated to avoid direct contact with exposed conductors.

Voltage detector application

The voltage meter testers can detect the presence of voltage in circuits or equipment and determine whether they are live. The electric voltage tester are commonly used in household electrical inspections, electrical repairs, equipment installation and maintenance, etc. They can quickly identify live and neutral wires, troubleshoot broken wires and leakage problems, and help users confirm electrical safety before operation.