The UNI-T UT18B MAX Digital Multimeter is a compact and versatile measuring tool designed for electronics troubleshooting, electrical maintenance, and DIY projects. In this blog, we walk through the unboxing experience and real-world function tests, all based on our hands-on video review for practical, real-use evaluation.
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| A hands-on overview of a compact multimeter built for real-world testing. |
1. Unboxing – What’s Inside the Box
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| Everything you need for testing, neatly packed in one box. |
Upon opening the package, the contents are neatly arranged and well-protected. Inside the box, you’ll find:
1× User manual
2 pairs of test leads
Standard gold-plated probes for general measurements
Fine-tipped probes for precision electronics work
1× K-type thermocouple for temperature measurement
⚠️ Note: Batteries are not included, so AA batteries must be prepared separately.
The multimeter itself feels solid, with a rugged casing and a large, easy-to-read display.
2. Powering On the Multimeter
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| Turn the knob to start simple and straightforward. |
To turn on the UNI-T UT18B MAX, simply rotate the selector knob from the OFF position to any measurement mode. Once the knob is turned, the multimeter powers on immediately and the display becomes active.
3. LED Function Test (Built-in LED Terminal)
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| Instantly check LEDs without probes. |
One standout feature of the UT18B MAX is its built-in LED test terminal.
To test an LED:
Insert a 5mm LED directly into the LED testing terminal
The LED lights up immediately upon connection
A green indicator light marks the positive terminal, making LED polarity identification quick and hassle-free.
4. DC Voltage Test (Adjustable Power Supply)
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Accurate voltage readings you can trust. |
Next, we tested DC voltage using an adjustable power supply.
Steps:
Set the multimeter to DC voltage mode
Connect the probes to the power supply output
The displayed voltage closely matches the set output of the power supply, showing stable and accurate voltage measurement.
5. DC Current Test
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| Reliable current measurement for circuit analysis. |
For DC current measurement:
The multimeter is connected in series with the circuit
The probe is inserted into the correct current input terminal
The UT18B MAX displays the current reading clearly, making it suitable for load testing and circuit diagnostics.
6. Resistance Test (270Ω Resistor)
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| Precise resistance readings for components. |
Set the selector to resistance mode
Connect probes across the resistor
The measured value is very close to 270Ω, confirming good resistance measurement accuracy.
7. Continuity Test (Breadboard)
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| Quick confirmation of good connections. |
Continuity testing is essential for checking wiring and connections.
Set the multimeter to continuity mode
Connect probes through a breadboard path
An audible beep confirms a complete and continuous connection.
8. Temperature Test (Thermocouple + Soldering Iron)
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| Fast and responsive temperature measurement. |
Set the multimeter to temperature mode
Apply heat using a soldering iron
The temperature reading rises smoothly and responds quickly, making this function useful for electronics repair and thermal monitoring.
📦 Where to Buy
Final Thoughts
The UNI-T UT18B MAX Digital Multimeter delivers reliable performance across a wide range of measurements, including:
LED testing
DC voltage and current
Resistance
Continuity
Temperature measurement
Its ease of use, clear display, and practical features make it a solid choice for technicians, engineers, students, and DIY electronics enthusiasts.
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