--- product_id: 470726911 title: "Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector" brand: "drok" price: "469.23 DT" currency: TND in_stock: true url: https://www.desertcart.tn/products/470726911-transistor-tester-drok-mosfet-transistor-capacitor-tester-mega328-npn-pnp store_origin: TN region: Tunisia --- # Auto shut-down with countdown Auto-identifies NPN/PNP & MOSFET 1.8" TFT color LCD Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector **Brand:** drok **Price:** 469.23 DT **Availability:** ✅ In Stock ## Summary > ⚡ Test Smarter, Not Harder: The Ultimate All-in-One Transistor Detective! ## Quick Answers - **What is this?** Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector by drok - **How much does it cost?** 469.23 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/470726911-transistor-tester-drok-mosfet-transistor-capacitor-tester-mega328-npn-pnp) ## Best For - drok enthusiasts ## Why This Product - Trusted drok brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **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. ## Overview 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. ## Description Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector ## Features - 【WIDE APPLICATION】- This multifunctional capacitance meter can be used to test triode, field-effect tube(FET), diode, resistor, capacitor, inductor, MOS, SCR, which is available for various electric transistor testing. - 【LARGE & CLEAR LCD DIGITAL DISPLAY】- This amazing detector adopts 1.8" TFT color LCD screen with high-resolution. Besides, different parameter is shown with different color, convenient and simple for you to check the parameter. - 【AUTOMATICAL IDENTIFICATION】- DROK intelligent transistor checker is able to detect NPN and PNP transistors, N-channel and P-channel MOSFET, diodes, thyristors, resistors, capacitors or other devices automatically. - 【AUTO SHUT-DOWN FUNCTION】- Our advanced electronic transistor tester owns auto shut-down function. There is shutdown countdown displayed on the monitor and the shutdown countdown time can be extended to 40s. - 【BATTERY POWERED】- This monitor is powered by DC9V battery (not included). ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Product Details - **Brand:** DROK - **Power Source:** Battery Powered - **Style:** Digital,Simple - **Colour:** Transistor Tester - **Item Weight:** 4 Pounds ## Images ![Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Image 1](https://m.media-amazon.com/images/I/61Gpalf+XBL.jpg) ![Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Image 2](https://m.media-amazon.com/images/I/716041k6+EL.jpg) ![Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Image 3](https://m.media-amazon.com/images/I/71QTrBdLzZL.jpg) ![Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Image 4](https://m.media-amazon.com/images/I/71ZPCC60e3L.jpg) ![Transistor Tester, DROK Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Image 5](https://m.media-amazon.com/images/I/61gtNAtw8RL.jpg) ## Questions & Answers **Q: I am trying to measure a inductor and it keeps coming back with a resistance. How do I fix this?** A: 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?** A: 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?** A: 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?** A: 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 ## Frequently Bought Together - DROK Transistor Tester LCR Meter, Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector - Signstek MESR-100 V2 Auto Ranging in Circuit ESR Meter Capacitor Tester/Low Ohm Meter Up to 0.01 to 100R, Support in Measuring Capacitance Resistance Circuit - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/470726911-transistor-tester-drok-mosfet-transistor-capacitor-tester-mega328-npn-pnp](https://www.desertcart.tn/products/470726911-transistor-tester-drok-mosfet-transistor-capacitor-tester-mega328-npn-pnp) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-17*