--- product_id: 23360260 title: "Extech 380320 Analog Insulation Tester - Megohmmeter for 250V, 500V, and 1000V Test Voltages - Measures Resistance to 400MOhm - Large Dial Display, Hard Case Included - Handheld" brand: "extech" price: "¥95780" currency: JPY in_stock: true reviews_count: 4 category: "Extech" url: https://www.desertcart.jp/products/23360260-extech-380320-analog-insulation-tester-megohmmeter-for-250v-500v-1000v store_origin: JP region: Japan --- # Up to 1000V test voltage Insulation resistance up to 400MΩ 6 AA batteries included for portable power Extech 380320 Analog Insulation Tester - Megohmmeter for 250V, 500V, and 1000V Test Voltages - Measures Resistance to 400MOhm - Large Dial Display, Hard Case Included - Handheld **Brand:** extech **Price:** ¥95780 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your diagnostics with confidence and clarity! ## Quick Answers - **What is this?** Extech 380320 Analog Insulation Tester - Megohmmeter for 250V, 500V, and 1000V Test Voltages - Measures Resistance to 400MOhm - Large Dial Display, Hard Case Included - Handheld by extech - **How much does it cost?** ¥95780 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/23360260-extech-380320-analog-insulation-tester-megohmmeter-for-250v-500v-1000v) ## Best For - extech enthusiasts ## Why This Product - Trusted extech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Complete Kit Ready:** Includes heavy-duty leads, alligator clip, batteries, strap & hard case - • **Live Circuit Warning:** Real-time AC voltage measurement keeps you safe and informed - • **Lock Power On Feature:** Extended test times without fatigue or interruptions - • **Multi-Voltage Testing:** 250V, 500V, and 1000V ranges to tackle any insulation challenge - • **Precision Analog Display:** Large, easy-to-read dial for instant diagnostics ## Overview The Extech 380320 Analog Insulation Tester is a rugged, battery-powered megohmmeter designed for professionals needing reliable insulation resistance testing up to 400MΩ. Featuring selectable test voltages up to 1000V, a large analog display, live AC voltage warning, and a lock power-on function, it comes complete with all necessary accessories for field-ready performance. Ideal for troubleshooting motors, cables, and high voltage equipment with precision and safety. ## Description From the Manufacturer Analog Megohmmeter has three voltage ranges (250V, 500V, 1000V) and an insulation range to 400M ohms. It also measures continuity, resistance and AC Voltage to 600V. Comes complete with test leads, 6 AA batteries, and a hard carrying case. Review: Great megger despite the low price. - I like being able to calibrate the needle and I like the adjustable voltage output. I had a 480v 3 phase motor that was tripping a vfd on a ground fault intermittently but would run no problem on bypass. I put this megger to it and it tested ok at 250v, very sketchy at 500v, and an apparent direct short to ground at 1000v. I was very impressed that a $200 meter was able to clearly show evidence of insulation break down. We had the motor redipped and replaced. The motor megged good at 1000v. I have been using this meter once a week for over a year now. Review: AWESOME - this is the coolest megger i have ever used! Easy, effective, I find shorting wires and bad motor leads with it effortlessly. THANKS! ## Features - TRIPLE TEST VOLTAGES: Measure with confidence across three essential test voltages (250V, 500V, and 1000V). This analog megohmmeter easily evaluates insulation resistance up to 400 MOhms, ensuring your electrical systems are safe and reliable. - LARGE ANALOG DISPLAY: Stop guessing with confusing digital fluctuations. The massive, easy-to-read analog dial provides clear, continuous feedback during testing, allowing you to instantly and visually track changing resistance values on the job. - LOCK POWER ON FUNCTION: Streamline your heavy-duty inspections. The convenient lock power-on feature frees up your hands for extended testing times, making it incredibly easy to perform long-duration evaluations without holding down a button. - COMPACT AND PORTABLE: Measure comfortably all day long. Weighing just 4 ounces and measuring a pocket-friendly 4.5 x 2.1 x 1.1 inches, this lightweight meter features an ergonomic design that allows for fast, one-handed operation in tight spaces. - COMPLETE PROFESSIONAL KIT: Measuring 7.9 x 3.6 x 2 inches and weighing 1.2 lbs, this tool is ready to travel. The kit includes heavy-duty test leads, alligator clips, a hanging strap, 6 AA batteries, and a protective hard carrying case. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0038KS2EK | | Best Sellers Rank | #143,814 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Insulation Resistance Meters | | Brand | Extech | | Brand Name | Extech | | Color | Green | | Customer Reviews | 4.3 out of 5 stars 10 Reviews | | Global Trade Identification Number | 00793950803202 | | Included Components | Product & Instructions Guide | | Item Dimensions | 2 x 7.9 x 3.6 inches | | Item Weight | 0.55 Kilograms | | Item dimensions L x W x H | 2 x 7.9 x 3.6 inches | | Manufacturer | Extech | | Minimum Operating Voltage | 250 Volts | | Model | 380320 | | Part Number | 380320 | | Power Source | Battery Powered | | Specification Met | (Unset) | | Style | 380320 | | Style Name | 380320 | | UPC | 793950803202 | | Unit Count | 1.0 Count | | Warranty Description | 2 Years | ## Product Details - **Brand:** Extech - **Color:** Green - **Item Weight:** 0.55 Kilograms - **Power Source:** Battery Powered - **Style:** 380320 ## Images ![Extech 380320 Analog Insulation Tester - Megohmmeter for 250V, 500V, and 1000V Test Voltages - Measures Resistance to 400MOhm - Large Dial Display, Hard Case Included - Handheld - Image 1](https://m.media-amazon.com/images/I/61bVuNxYptL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great megger despite the low price. *by N***N on March 8, 2017* I like being able to calibrate the needle and I like the adjustable voltage output. I had a 480v 3 phase motor that was tripping a vfd on a ground fault intermittently but would run no problem on bypass. I put this megger to it and it tested ok at 250v, very sketchy at 500v, and an apparent direct short to ground at 1000v. I was very impressed that a $200 meter was able to clearly show evidence of insulation break down. We had the motor redipped and replaced. The motor megged good at 1000v. I have been using this meter once a week for over a year now. ### ⭐⭐⭐⭐⭐ AWESOME *by T***R on March 31, 2013* this is the coolest megger i have ever used! Easy, effective, I find shorting wires and bad motor leads with it effortlessly. THANKS! ### ⭐ waste of money. *by N***S on October 13, 2013* This insulation tester sucks even when you turn it off the battery drains. had to install kill switch direct to battery so it won't drain... --- ## 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.jp/products/23360260-extech-380320-analog-insulation-tester-megohmmeter-for-250v-500v-1000v](https://www.desertcart.jp/products/23360260-extech-380320-analog-insulation-tester-megohmmeter-for-250v-500v-1000v) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-18*