Most voltage testers give one answer. The 1881 gives three. It reads the exact voltage on a live circuit, senses a live wire without touching the metal, and traces a conductor until the signal stops at a hidden break. All of that happens in the 12V to 220V AC/DC range, through a single test button.
What the 1881 Measures
The 1881 Digital Inductive Multi-function Voltage Tester is a pen-style unit with an LCD that shows real numbers. Put the probe tip on a live circuit and the display shows the voltage value. The neon lamp confirms a phase wire at a glance, which matters when your eyes are fixed on a ceiling box and your hands are already occupied.
The built-in functions go past voltage readout. The same tester checks polarity on low-voltage DC sources, tests continuity on non-energized conductors such as cables, fluorescent tubes, transformer windings, and motor coils, and gives a fast pass/fail check on diodes and transistors.
All of it is operated by one button. That design choice is worth understanding before you pick up the tool, because it is also what makes the three detection modes possible.
Mode One: Direct Detection Reads the Actual Voltage
Press and hold the test button, then touch the probe tip to the test point. The LCD shows the value immediately. The rating covers 12V to 220V on both AC and DC. When the measured voltage stays below 70 percent of the upper range threshold, the tester shows the lower range value automatically, so low-voltage work is not lost on a coarse scale.
DC polarity uses the same contact method. Touch the probe to one terminal and hold the other terminal with your hand. If the display lights up with the live symbol and the digits, the probe is on the positive side. Reverse the setup and the screen stays blank, which tells you the probe now sits on the negative terminal.
Continuity checks need no power at all. Probe one end of the conductor, grip the other end, and the indicator lights when the path is closed. The same circuit can flag a dead fluorescent tube or a broken motor coil before you pull the housing apart.
Mode Two: Inductive Sensing Finds Live Wires Without Contact
For conductors you cannot safely touch, the 1881 switches to sensing mode. Press and hold the test button, which doubles as the sense electrode, and bring the probe tip near the insulated surface of the wire. A phase wire triggers the live symbol on the display. The metal conductor is never touched.
Bundled wires reduce accuracy, so spread them apart a little before testing. On a multi-core cable, verify the unit on a known live source first, then sweep the bundle. The symbol appears only over the energized line, which isolates the live phase from the neutral and the earth.
Mode Three: Breakpoint Detection Traces the Fault to the Meter
The same sensing behavior finds a broken wire hidden inside a wall or conduit. Hold the button down and slide the probe tip along the phase wire from the supply end. The live symbol stays on while the conductor carries current. At the exact point where the wire opens, the symbol vanishes. That spot is your break.
That converts a common headache into a short routine:
- Identify the live wire at the supply and confirm the symbol.
- Slide the probe tip along the wire surface.
- Watch where the live symbol disappears.
- Mark the spot before cutting into anything.
The Test Button Doubles as the Sense Electrode
Every detection function runs through one button. Direct readings, inductive sensing, and breakpoint tracing use the same control, which doubles as the sense electrode for non-contact work. The manual is explicit about the one thing you should never do.
Never touch the probe tip and the test button at the same time during a measurement. That completes a path through the tester, can short the circuit, and ruins the reading. Keep the probe tip on the work and your other hand off both contacts.
Safety Notes and Handling
The 1881 has a hand guard, and the manual is blunt about it: keep your fingers behind the guard. Use the tester only in dry conditions. Confirm it on a known live source before trusting a reading. Stay inside the 12V to 220V rating. Disconnect the unit after each measurement. When the display dims or flickers, replace the battery before the readings turn unreliable. Store the tester dry and out of direct sunlight.
The rated temperature range is -10°C to 50°C, and the unit is CE compliant.
Technical Specifications at a Glance
| Parameter | Value |
|---|---|
| Voltage range | 12V to 220V AC/DC |
| Display | LCD digital display |
| Indicator | Neon lamp |
| Test functions | Voltage detection, polarity test, continuity test, diode test, breakpoint detection |
| Temperature range | -10°C to 50°C |
| Safety standard | CE compliant |
Our factory prints this parameter list into the manual that ships with every 1881, so the number you see on the packaging matches the number you can verify in hand.
Test the Break-Finder Trick on Your Own Wiring
A sample costs little and answers the only question that matters: does it behave on your wiring the way it reads on paper? Hold the button, slide the tip along a live phase wire in your shop, and watch where the symbol disappears. If that routine does not sell you on the tool, nothing will.
The CHINYOO factory in Wenzhou builds this series alongside its other testers, and every unit ships with CE documents. We back the 1881 with a 12-month warranty, and an engineer answers technical questions within 24 hours. Buying in volume? Tell us the quantity you plan to stock on the quote request page, and we will reply with pricing and lead time.
For wiring questions or a second opinion on your test procedure, contact our engineering team.