--- product_id: 3045404 title: "GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp" brand: "gtc" price: "HK$31" currency: HKD in_stock: false url: https://www.desertcart.hk/products/3045404-gtc-cm100-1-ma-to-100-amps-ac-dc-low store_origin: HK region: Hong Kong --- # 0.001–100 A AC/DC range Compact 1.2" jaw size 2 readings/sec sampling GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp **Brand:** gtc **Price:** HK$31 **Availability:** ❌ Out of Stock ## Summary > ⚡ Clamp the Current, Own the Circuit! ## Quick Answers - **What is this?** GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp by gtc - **How much does it cost?** HK$31 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/3045404-gtc-cm100-1-ma-to-100-amps-ac-dc-low) ## Best For - gtc enthusiasts ## Why This Product - Trusted gtc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ready-to-Go Kit:** Includes test leads, deluxe soft pouch, and batteries—work smarter from the start. - • **Smart Data Capture:** Peak and data hold functions with intuitive rotary switch for fast, reliable readings. - • **Compact Power Clamp:** Small jaw design fits tight spaces—perfect for automotive and electrical pros. - • **Dual Voltage & Resistance:** Handles AC/DC voltage up to 600 V plus resistance checks with ease. - • **Precision Current Mastery:** Measures ultra-low 1 mA to high 100 A currents for flawless diagnostics. ## Overview The GTC CM100 is a versatile low current clamp meter designed for precise AC/DC current measurement from 0.001 to 100 amps, with voltage testing up to 600 volts. Its compact jaw size allows access to tight spaces, making it ideal for automotive diagnostics and electrical troubleshooting. Featuring peak and data hold functions, fast sampling at 2 readings per second, and continuity checks with audible alerts, it comes complete with test leads, a deluxe carrying pouch, and batteries for immediate use. ## Description Quickly and easily measures circuit current consumption, as well as voltages and resistances. ## Features - AC/DC current measurement from 0.001 up to 100 A. which makes it a great tool for measuring parasitic draws and AC/DC voltage measurement up to 600 volt - Small jaw: 1.2 inches (W) x 0.53 inches (D) (300x13.4millimeters) with clamp opening up to 1/2 inch (12.5 millimeters) - Peak and Data hold functions with one rotary switch operation - 2 readings per second sampling and continuity check with audible indicator - Test leads soft carrying deluxe pouch and batteries included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001TCWL1E | | Best Sellers Rank | #359,798 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #218 in Clamp Meters | | Brand | GTC | | Brand Name | GTC | | Color | Grey with Yellow Clamp | | Customer Reviews | 4.4 out of 5 stars 301 Reviews | | Global Trade Identification Number | 00833303000282 | | Included Components | CM100, 2 batteries, User's manual, Test leads, Soft carrying pouch | | Item Dimensions | 11.4 x 5.7 x 2.5 inches | | Item Type Name | Current Clamp Meter | | Item Weight | 15.2 ounces | | Item dimensions L x W x H | 11.4 x 5.7 x 2.5 inches | | Manufacturer | General Technologies Corp. | | Measurement Type | Ammeter | | Model | CM100 | | Number of Items | 1 | | Part Number | CM100 | | Power Source | Battery Powered | | Specification Met | Gtc | | Style | Modern | | Style Name | Modern | | UPC | 833303000282 | | Unit Count | 1 Count | | Warranty Description | 1 YEAR EXCLUDING BATTERIES | ## Product Details - **Brand:** GTC - **Color:** Grey with Yellow Clamp - **Item Weight:** 15.2 ounces - **Power Source:** Battery Powered - **Style:** Modern ## Images ![GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp - Image 1](https://m.media-amazon.com/images/I/71Umca8gORL.jpg) ![GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp - Image 2](https://m.media-amazon.com/images/I/71yuYsG+NML.jpg) ![GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp - Image 3](https://m.media-amazon.com/images/I/61e--cCHdLL.jpg) ![GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp - Image 4](https://m.media-amazon.com/images/I/61bIaEftPSL.jpg) ## Questions & Answers **Q: The stated accuracy for DC current is, " +/- 2.5% +/- 10 dgts." (Assume "dgts" = digits?) Can anyone clearly explain what "+/- 10 digits" means?** A: The +/- 10 digits means that the meter may be off 10 digits in the least significant (furthest to the right of the decimal place) digit. It's a standard way that meters are rated for accuracy besides the +/- %. If the meter is reading to 3 significant digits (0.000 to +/- 9.999 then the meter may be "off" ten digits in the 0.00x place). This is in addition to the percent error. For example, if this meter reads "1.000" mA. The actual value may be +/- 2.5% (+/- 0.025 mA) +/- 10 digits, so that means the actual value would be between 1.000+/-.025+/-.010= 1.035 to 0.965. If the meter range was only 2 decimal places (it read 1.00) then the actual value would be 1.00+/-.025+/-0.10= 1.33 to 0.87. Think of "+/- digits" at the amount number of values the least significant digit in the reading may be "wrong". This must be added to the percentage error. Hope that makes sense. **Q: Will the 100 amp max. range be enough to check the starter current drawn from the battery by cars & trucks ? Will the clamps fully grip the cables ?** A: For starter motors, this is the wrong tool for the job. It is the best low current clamp meter I have used, closest measurement to a Siemens device I also use, and that's well over $3000. This little guy fits in your pocket, and it's made in the USA. It is temperature sensitive, so it does require zeroing occasionally, its only drawback. But, if you are measuring a few milliamps, it's very useful. For starter draw, I use the Fluke 88 with the i1010 clamp accessory. With this device, you can read average and peak draw. **Q: For AC current measurements at the low end (20-100 mA), does this meter achieve the stated accuracy/precision (+/- 10 mA)? Thanks.** A: On AC current it is OK but on DC it is very unstable and you have to constantly pushing Reset because after measuring a current it does not returns to zero, it stays at there last measure. **Q: Can this meter read in the 2 - 3 ma range in the ac mode?** A: I never try that, for low frequency should be OK. For high frequency AC , should use scope. ## Frequently Bought Together - GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp - GTC063 Fuse Socket Connector Kit by GTC, General Technologies Corp - Fuse Buddy ESI 308B Fuse Buddy ATC Current Loop, Factory --- ## 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.hk/products/3045404-gtc-cm100-1-ma-to-100-amps-ac-dc-low](https://www.desertcart.hk/products/3045404-gtc-cm100-1-ma-to-100-amps-ac-dc-low) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-10-02*