Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector

Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector

Q: I am trying to measure a inductor and it keeps coming back with a resistance. How do I fix this?

I found out that the tester can’t measure inductance below 10uH. It helps to buy a pack of inductors of various values to always check the tester. This is how I found out that mine cant’ measure inductors below 10uH.

Q: Can it be powered with a cable?

I did a simple mod in order to power it from a basic 9vdc power supply l. I simply installed a standard 12mm polarised jack into the case (theres a slot in the top center of the pcb to allow room) and use a currwnt limited wall wart or bench top piwer supply for the required 9 volts (solder the 2 wires from the jack to the battery terminal connections on the pcb matching polarity). Mine has worked a charm and no worries plus you have the option of using either power source. If you would like to know more on this mod reply and I will supply you with a more detailed step by step with photos.

Q: will this tester work with germanium transistors? also, does it report transistor leakage?

I haven't found a germanium transistor to test yet, but I have tested Ge small-signal diodes with mine, so I'm fairly certain this tester can properly identify and test Ge teansistors as well. If so, it will show the device type (PNP/NPN), ID the leads (BCE), and show the hfe (gain), but it will not show a leakage current value. The primary diference between Ge and Si devices is the difference in the voltage drop across a forward-biased junction. Ge junctions show a 0.3 - 0.4v drop, and Si junctions show 0.6 - 0.7v.

Q: will it tell me the pin identification?

With in reason. You will need the spec sheet, say you have a bad unit, it may identify it as two diodes and you know it is not two diodes, it is a 222. So YES it will / it has done it correctly for me on good devices, on devices that fail, it may show unknown device or something like a mess of diodes or something else. Nothing the spec sheet would show. hope this helps. I also use a Heathkit transistor tester so I can supply a load. If you are working with hard to replace /find items, I suggest you also get something that will supply a real load so you can see if it breaks down after 2 minutes or something like that. hope this helps, I am pleased with cost vs use I have gotten. SO far so good. Get used to getting the pins in 1 2 3 any way, but 1,2,3. George

4.4/5

Product ID: 470726911

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Details

Brand
DROK
Power Source
Battery
Style
Digital Simple
Colour
Transistor
Item Weight
4 Pounds

⏳Auto shut-down with countdown

⚡Auto-identifies NPN/PNP & MOSFET

📊1.8" TFT color LCD

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Description

⚡ Test Smarter, Not Harder: The Ultimate All-in-One Transistor Detective!

SMART AUTO DETECTION - Automatically identifies NPN/PNP transistors, N/P-channel MOSFETs, diodes, thyristors, and more—no manual setup needed.
VIVID 1 8 COLOR DISPLAY - High-res TFT screen with color-coded parameters for instant clarity and precision.
PORTABLE BATTERY POWERED - Compact, lightweight design powered by a standard 9V battery—ideal for on-the-go professionals and fieldwork.
ALL IN ONE COMPONENT TESTING - Effortlessly tests transistors, diodes, resistors, capacitors, inductors, MOS, SCR, and ESR with one device.
ENERGY SAVING AUTO SHUT DOWN - Built-in countdown timer powers off device after inactivity, extending battery life and reliability.

The DROK Transistor Tester is a versatile, battery-powered digital meter featuring a sharp 1.8" color LCD that automatically identifies a wide range of electronic components including transistors, MOSFETs, diodes, resistors, capacitors, and inductors. Designed for precision and convenience, it includes an energy-saving auto shut-down function and supports ESR measurement, making it an essential tool for engineers and electronics enthusiasts seeking fast, reliable diagnostics.

Specifications

Brand	DROK
Power Source	Battery Powered
Style	Digital,Simple
Colour	Transistor Tester
Item Weight	4 Pounds
Min. Operating Voltage	9 Volts
Specification Met	CE
Measurement Type	ESR meter
Maximum Operating Voltage	9 Volts
Manufacturer	Cllena
Item model number	300427
Package Dimensions	17.2 x 11 x 3.81 cm; 1.81 kg
ASIN	B01MS1FOYM

Have a Question? See What Others Asked

I am trying to measure a inductor and it keeps coming back with a resistance. How do I fix this?

Can it be powered with a cable?

will this tester work with germanium transistors? also, does it report transistor leakage?

will it tell me the pin identification?

Common Questions

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