UT261B - Measurement Uni-T - Free user manual and instructions
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| Product Type | Non-Contact Voltage Tester |
| Voltage Detection Range | 12V - 1000V AC |
| Frequency | 50/60 Hz |
| Detection Method | Non-contact (electric field sensing) |
| Indication | Audible beep and red LED flash |
| Flashlight | Built-in white LED |
| Power Supply | 2 x AAA batteries (1.5V) |
| Battery Life | Approximately 12 hours of continuous use |
| Auto Power Off | After 5 minutes of inactivity |
| Safety Rating | CAT III 1000V, CAT IV 600V |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
| Humidity | <80% RH (non-condensing) |
| Dimensions | 155 x 25 x 25 mm (6.1 x 1.0 x 1.0 in) |
| Weight | 50 g (1.76 oz) including batteries |
| Material | ABS plastic, orange/black |
| Certification | CE, RoHS |
| Accessories Included | User manual, 2 x AAA batteries |
| Maintenance & Cleaning | Wipe with dry cloth; do not use solvents |
| Spare Parts & Repairability | Battery compartment accessible; no user-serviceable parts inside |
Frequently Asked Questions - UT261B Uni-T
How does the Uni-T UT261B detect voltage?
The UT261B uses non-contact voltage detection by sensing the electric field around a live conductor. No direct contact is required.
What is the voltage range of the UT261B?
It detects AC voltages from 12V to 1000V at frequencies of 50/60 Hz.
How do I change the batteries?
Slide the battery cover off at the bottom of the device. Insert two AAA 1.5V batteries with correct polarity, then replace the cover.
Why does the tester beep but not light up?
The beep and LED should work together. If only beeping, check the battery level or ensure the sensor tip is near a live wire. Replace batteries if low.
Can the UT261B detect DC voltage?
No, it is designed for AC voltage only. It will not detect DC voltage.
What does the auto power-off feature do?
To save battery life, the tester automatically turns off after 5 minutes of inactivity. Press the power button to restart.
Is the UT261B safe to use on high voltage?
Yes, it is rated CAT III 1000V and CAT IV 600V, making it safe for residential and industrial use when used correctly.
How do I use the flashlight?
Press and hold the power button for about 1 second; the built-in white LED flashlight will turn on. Release to turn off.
Why does the tester beep continuously even when not near a wire?
This may be due to electrical interference or low battery. Move away from potential sources (e.g., fluorescent lights) and replace batteries if needed.
Can I test a broken wire inside a wall?
The UT261B only detects live voltage. It can confirm if a wire is energized but cannot locate breaks. Use a wire tracer for that purpose.
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USER MANUAL UT261B Uni-T
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Product information
Brand : Uni-T
Model : UT261B
Category : Measurement