---
product_id: 3045404
title: "CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp"
brand: "gtc"
price: "€ 445.42"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.cy/products/3045404-cm100-1-ma-to-100-amps-ac-dc-low-current
store_origin: CY
region: Cyprus
---

# 0.001-100A AC/DC current range Compact 1/2 inch clamp jaw 2 readings/sec sampling rate CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp

**Brand:** gtc
**Price:** € 445.42
**Availability:** ✅ In Stock

## Summary

> ⚡ Clamp the Current, Own the Circuit!

## Quick Answers

- **What is this?** CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter by General Technologies Corp by gtc
- **How much does it cost?** € 445.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/3045404-cm100-1-ma-to-100-amps-ac-dc-low-current)

## 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

- • **Instant Data Capture:** Peak and data hold functions with a simple rotary switch keep your measurements sharp and accessible.
- • **All-Inclusive Pro Kit:** Includes test leads, deluxe soft carrying pouch, and batteries—ready to tackle any electrical challenge.
- • **Compact Clamp for Tight Spaces:** Small 1.2" x 0.53" jaw fits into cramped automotive and electrical setups effortlessly.
- • **Rapid Sampling & Audible Alerts:** 2 readings per second plus continuity check with sound indicator for efficient diagnostics.
- • **Precision Current & Voltage Mastery:** Measure ultra-low 0.001A to 100A AC/DC currents and up to 600V voltage with pinpoint accuracy.

## Overview

The GTC CM100 is a modern, battery-powered clamp meter designed for professional-grade AC/DC current measurement from 0.001 to 100 amps and voltage readings up to 600 volts. Its compact jaw size and rapid sampling rate make it ideal for diagnosing parasitic battery drains and tight automotive electrical spaces. Equipped with peak/data hold, continuity alerts, and a complete accessory kit, it’s a reliable tool for precise, on-the-go electrical testing.

## Description

Quickly and easily measures circuit current consumption, as well as voltages and resistances.

Review: Works well, very accurate - Great milliamp meter for DIYing a vehicles electrical system/battery drain. Measurements are consistent and accurate. Easy to use. Money well spent!
Review: Perfect for Hunting Automotive Ignition Off Parasitic Battery Drains - I give it 5 Stars because of the purpose it serves for the price one pays. DC clamp meters are not usually low cost and if they are they are usually less than stellar. This meter is perfect for chasing after automotive ignition off parasitic battery drains, AKA Dark Current". The small form factor helps for getting into tight places. There are other reviews here about the characteristics of this meter such as its sensitivity to ambivalent temps. I find if I'm working under a hot hood, as the meter warms up if held under there long, just re-zero it every once and a while and clamp again. If I am going to check current on a given cable I will hold it beside the point where I am going to clamp and zero it first. Especially if near a battery or other live wires or junctions so any magnetic fields can be taken into the factor. Its easy enough to just press a button twice. There is a very detailed Utube review by Pretty Boy 0508.

## 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 | #135,111 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #90 in Clamp Meters |
| Brand | GTC |
| Brand Name | GTC |
| Color | Grey with Yellow Clamp |
| Customer Reviews | 4.4 out of 5 stars 302 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 Height | 2.5 inches |
| Item Type Name | Current Clamp Meter |
| Item Weight | 0.95 Pounds |
| 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 |
| Power Source | Battery Powered |
| Specification Met | Gtc |
| Style | Modern |
| Style Name | Modern |
| UPC | 833303000282 |
| Warranty Description | 1 YEAR EXCLUDING BATTERIES |

## Product Details

- **Brand:** GTC
- **Power Source:** Battery Powered
- **Style:** Modern
- **Color:** Grey with Yellow Clamp
- **Item Weight:** 15.2 ounces

## Images

![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)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well, very accurate
*by G***R on July 5, 2024*

Great milliamp meter for DIYing a vehicles electrical system/battery drain. Measurements are consistent and accurate. Easy to use. Money well spent!

### ⭐⭐⭐⭐⭐ Perfect for Hunting Automotive Ignition Off Parasitic Battery Drains
*by G***I on August 17, 2014*

I give it 5 Stars because of the purpose it serves for the price one pays. DC clamp meters are not usually low cost and if they are they are usually less than stellar. This meter is perfect for chasing after automotive ignition off parasitic battery drains, AKA Dark Current". The small form factor helps for getting into tight places. There are other reviews here about the characteristics of this meter such as its sensitivity to ambivalent temps. I find if I'm working under a hot hood, as the meter warms up if held under there long, just re-zero it every once and a while and clamp again. If I am going to check current on a given cable I will hold it beside the point where I am going to clamp and zero it first. Especially if near a battery or other live wires or junctions so any magnetic fields can be taken into the factor. Its easy enough to just press a button twice. There is a very detailed Utube review by Pretty Boy 0508.

### ⭐⭐⭐⭐⭐ accurate and fast response time
*by M***E on January 12, 2012*

Very accurate down to 1ma level. When measuring the DC current combined with peak function, you need follow the current flow direction mark on the clamp side, if flow direction reversed, then you will always get "0" as peak value because the real peak value is recorded as negative,then you will think the peak funtion is not working.( this is also true for dc vlotage measuremet with test lead) Its response time is quick. The zero function work fast and accurate. Only one issue: the DC voltage measuremet get 0.2 volt difference (less) in negative reading if you reverse the two test leads to measre.(like 1.5 v and -1.3 v which shouel be -1.5 v) I tried two meters and they act the same. I may live with this and remember to keep the low DC voltage measurment in positive side. Amazon even send me the new second meter before I return the first one. Definitely a great buy, if you wnat measure low accurate dc or ac current with clamp, and need peak function.

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-01-30*