--- product_id: 105191677 title: "Sg 1040 Battery Powered Digital Insulation Tester 500V/1000V Dc 40Gohm,Autorange-With Calibration Certificate" brand: "sigma instruments" price: "€ 116.82" currency: EUR in_stock: true reviews_count: 8 category: "Sigma Instruments" url: https://www.desertcart.sk/products/105191677-sg-1040-battery-powered-digital-insulation-tester-500v-1000v-dc store_origin: SK region: Slovakia --- # Test voltage up to 1000V DC with 40GΩ range 3999 counts digital display with backlight Battery powered for ultimate portability Sg 1040 Battery Powered Digital Insulation Tester 500V/1000V Dc 40Gohm,Autorange-With Calibration Certificate **Brand:** sigma instruments **Price:** € 116.82 **Availability:** ✅ In Stock ## Summary > ⚡ Stay ahead with precision power – test smarter, not harder! ## Quick Answers - **What is this?** Sg 1040 Battery Powered Digital Insulation Tester 500V/1000V Dc 40Gohm,Autorange-With Calibration Certificate by sigma instruments - **How much does it cost?** € 116.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/105191677-sg-1040-battery-powered-digital-insulation-tester-500v-1000v-dc) ## Best For - sigma instruments enthusiasts ## Why This Product - Trusted sigma instruments brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust & Portable:** Battery-powered design weighing just 920g makes it easy to carry and use on-site without power constraints. - • **Smart Auto-Ranging:** Auto range feature simplifies operation by automatically selecting the optimal measurement scale, saving you time and hassle. - • **Certified Reliability:** Comes with a calibration certificate guaranteeing accuracy and compliance for professional-grade testing. - • **Powerful Testing Range:** Supports insulation resistance testing at 250V, 500V, and 1000V DC with a massive 40GΩ range for versatile diagnostics. - • **Precision at Your Fingertips:** High-resolution 3999-count digital display with backlight ensures crystal-clear readings even in low light. ## Overview The Sigma Instruments SG 1040 is a battery-powered digital insulation tester featuring a 3999-count backlit display, autoranging capability, and testing voltages of 250V, 500V, and 1000V DC. It offers a high insulation resistance measurement up to 40GΩ with a driving current ≥15mA, making it a reliable and portable tool for professional electrical diagnostics, complete with a calibration certificate for assured accuracy. ## Description Digital insulation tester autorange, 3999 counts, 250v, 500v, 1000vdc, 40gohm with backlight and overload protection, with timer. 3999 Digits jumbo lcd display with backlight. Maximum reading 3999; test of insulation resistance at 250 v, 500 v or 1000 v with high driving capacity of ≥ 15ma. Dual display of the testing voltage and insulation value simultaneously. Data hold. Auto ranging multimeter Review: Great device for fault finding - It's a reliable product. Does the job if you want to test for shorts or find faults in wiring. I like the fact that it comes with a calibration certificate. I wonder if the company has a way to send the tester in for regular calibration. Remember if you want to do an insulation test at the distribution box you need to disconnect all lights and devices such as fans, ac geysers etc. fan regulators need to be disconnected. All switches need to be on but if the switch has an led indicator the led must be disconnected. As the led indicator is connected between live and neutral it will show a short. Remember this device passes high voltage into the wires any device that is connected that cannot handle 500v and above will be destroyed. If you have flash cieling installed with Leds, you will have to disconnect all led drivers too. Review: Not good show error - I want give return due to shown error ## Features - Display: 3999 counts digital, with backlight and overload protection, with timer - 250vdc, 500vdc, 1000vdc, 40gohm - Maximum reading 3999, test of insulation resistance at 250 v, 500 v or 1000 v with high driving capacity of ≥ 15ma. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01DO3CDMM | | Best Sellers Rank | #79,078 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #90 in Insulation Resistance Meters | | Brand | Sigma Instruments | | Brand Name | Sigma Instruments | | Colour | Black | | Country of Origin | China | | Customer Reviews | 3.2 out of 5 stars 43 Reviews | | Included Components | Digital Insulation Tester | | Item Dimensions | 7.4 x 18.8 x 20.2 Centimeters | | Item Weight | 920 Grams | | Item dimensions L x W x H | 7.4 x 18.8 x 20.2 Centimeters | | Manufacturer | Sunil Associates, Sunil Associates, Ashoka Place, Main Road ,Opp. Metro Piller No 211, 23 West Patel Nagar , New Delhi 110008 ; +91 7042836466 | | Manufacturer Contact Information | Sunil Associates, Ashoka Place, Main Road ,Opp. Metro Piller No 211, 23 West Patel Nagar , New Delhi 110008 ; +91 7042836466 | | Measurement Type | Multimeter | | Minimum Operating Voltage | 250 Volts (DC) | | Model Number | insu_1 | | Packer Contact Information | Eagle Network Supply Pvt. Ltd. , Khasra No. 399 Delhi - 110030 ; +91 1143528338 | | Power Source | Battery Powered | | Power Source Type | Battery Powered | | Style | Digital | | Style Name | Digital | | Unit Count | 1 Count | ## Product Details - **Brand:** Sigma Instruments - **Power Source:** Battery Powered - **Style:** Digital - **Colour:** Black - **Item Weight:** 920 Grams ## Images ![Sg 1040 Battery Powered Digital Insulation Tester 500V/1000V Dc 40Gohm,Autorange-With Calibration Certificate - Image 1](https://m.media-amazon.com/images/I/71eh9uNgCKL.jpg) ## Questions & Answers **Q: 1.What is the measure range (insul-resistance), at voltages (250/500/100V)? 2. What is the resolution of measured resistance at above ranges?** A: Dear Sir, Kindly refer your message, Voltage Range can measure : 250VDC (0.25MOhm to 400MOhm); 500VDC (0.5MOhm to 4GOhm); 1000VDC (1.5MOhm to 40GOhm) Regards Sunil Associates **Q: how many test can be carried out by 1 set of new battery** A: Dear Sir, Kindly refer your message, in the instrument we provide AA 1.5V Alkaline battery which have much higher current capacity as compared to the normal battery. Also it depends upon the test you carry on your sample. If you do testing 5 to 10 min on one sample then the output will vary as compare to normal testing. **Q: Is there any warranty on product .** A: Sir, it has 6 months warranty against manufacturing defects. **Q: Can we use it for testing 11Kv or 33kV High tension line fault testing ?** A: Yes you can check the insulation of your sample. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great device for fault finding *by A***S on 7 February 2025* It's a reliable product. Does the job if you want to test for shorts or find faults in wiring. I like the fact that it comes with a calibration certificate. I wonder if the company has a way to send the tester in for regular calibration. Remember if you want to do an insulation test at the distribution box you need to disconnect all lights and devices such as fans, ac geysers etc. fan regulators need to be disconnected. All switches need to be on but if the switch has an led indicator the led must be disconnected. As the led indicator is connected between live and neutral it will show a short. Remember this device passes high voltage into the wires any device that is connected that cannot handle 500v and above will be destroyed. If you have flash cieling installed with Leds, you will have to disconnect all led drivers too. ### ⭐ Not good show error *by G***A on 20 October 2021* I want give return due to shown error ### ⭐⭐⭐ Ok *by S***U on 22 January 2021* Ok ## Frequently Bought Together - Sigma Instruments - SG 1040 Digital Insulation Tester 500V/1000V Dc 40Gohm, Autorange - with Calibration Certificate - Metravi Instruments Metravi ERT-1502 Digital Earth Resistance Tester with Testing it and Cables --- ## 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.sk/products/105191677-sg-1040-battery-powered-digital-insulation-tester-500v-1000v-dc](https://www.desertcart.sk/products/105191677-sg-1040-battery-powered-digital-insulation-tester-500v-1000v-dc) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-19*