The Klein Tools CL1000 is a 400A AC clamp meter with a 1.25-inch jaw opening, rated CAT III 600V. It features a backlit display with integrated work light, magnetic mount, lead storage, non-contact voltage detection, and an analog bar graph. Designed for electricians performing routine electrical testing and panel work. Weighing 0.67 lb, it offers a practical combination of functionality and portability for daily jobsite use. The CL1000 is no longer in production. Backed by Klein Tools' 1-year limited warranty.
Is the CL1000 still available?
No — the CL1000 has been discontinued. The CL490 is its current-generation equivalent with True RMS measurement added.
What was the CL1000?
A 400A AC average-sensing clamp meter with a built-in worklight, rated CAT III 600V. Average-sensing meters are accurate on pure sine-wave loads but read incorrectly on motors, VFDs, and non-linear loads.
What replaced it?
The CL490 (400A AC/DC True RMS, dual display, temperature) is the current 400A clamp meter. It upgrades the measurement engine to True RMS, which handles non-sinusoidal waveforms accurately.
# Klein Tools® CL1000 400A AC Clamp Meter **Model:** `CL1000` **Brand:** Klein Tools **Category:** Clamp Meter > The Klein Tools CL1000 is a 400A AC clamp meter with a 1.25-inch jaw opening, rated CAT III 600V. It features a backlit display with integrated work light, magnetic mount, lead storage, non-contact voltage detection, and an analog bar graph. Designed for electricians performing routine electrical testing and panel work. Weighing 0.67 lb, it offers a practical combination of functionality and portability for daily jobsite use. The CL1000 is no longer in production. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Digital Clamp Meter | | Form Factor | hook | | Ac Amp Capacity | 400 | | True Rms | No | | Auto Ranging | No | | Temperature Measurement | No | | Low Impedance Loz | No | | Worklight | Yes | | Flexible Clamp | No | | Dual Display | No | | Jaw Opening In | 1.25 | | Voltage Range Ac | 600V AC | | Cat Rating | CAT III 600V | | Assembled Weight Oz | 10.72 | | Barcode (UPC) | 092644692024 | | Warranty | 1-year limited | ## What's Included - Case - Test leads - Batteries Source: https://www.jaspecs.com/klein-tools/clamp-meter/cl1000-klein-tools-400a-ac-clamp-meter/