Klein Tools USB Power Meter ET920 Dual-Port Voltage and Current Tester

Description

Product Overview

The Klein Tools ET920 USB Power Meter is engineered for professionals who need precise, real‑time data on USB power delivery. Featuring a high‑resolution LCD, the meter displays voltage ranging from 3 to 20 V and current up to 3 A on USB‑A ports and 5 A on USB‑C ports, covering the majority of modern charging standards, including Qualcomm Quick Charge. Its ability to calculate capacity, energy, and resistance provides a comprehensive view of power performance, allowing users to diagnose issues quickly and accurately.

Designed with durability in mind, the ET920 boasts a rugged, pocket‑sized chassis that can survive drops of up to 2 m (6.6 ft) without compromising functionality. The device weighs only 1.7 oz, making it easy to carry on a tool belt or in a pocket, while the robust housing protects internal components from dust, moisture, and accidental impacts on the job site.

Data logging is a standout feature: the meter can store up to ten separate readings, enabling side‑by‑side comparison of voltage and current trends over time. This capability is especially valuable for technicians who need to track performance across multiple devices or verify that power supplies meet specifications during routine maintenance.

Safety is integrated directly into the user interface. The ET920 detects overload conditions for both voltage and current, instantly alerting the operator to potential hazards. This proactive protection helps prevent damage to sensitive electronics and reduces the risk of fire or electrical injury during testing.

Compatibility is broad, supporting both USB‑A and USB‑C connectors. Whether you are testing a laptop charger, a power bank, a smartphone adapter, or an industrial USB power source, the ET920 provides reliable measurements without the need for multiple tools. Its plug‑and‑play setup requires only a simple inline connection between the power source and the device under test, streamlining workflow and minimizing setup time.

Usage

Electricians and field technicians use the ET920 to verify that USB power supplies meet required specifications before installation. By connecting the meter inline with a charger or power source, they can instantly see voltage and current levels, ensuring compliance with safety codes and manufacturer guidelines. This quick verification reduces the likelihood of equipment failure and helps maintain system reliability.

In laboratory environments, engineers employ the meter to characterize the performance of new USB devices, assess charging efficiency, and benchmark power delivery against industry standards. The ability to log multiple readings enables detailed analysis of how devices behave under varying loads, supporting research and development efforts.

For hobbyists and DIY enthusiasts, the ET920 offers an affordable way to explore the capabilities of USB power. Whether building a custom charging station or troubleshooting a home‑grown project, the meter’s clear display and straightforward operation make it accessible to users of all skill levels.

Why Choose Us

Klein Tools has a reputation for producing high‑quality, American‑made tools that stand up to the toughest jobsite conditions. The ET920 continues this tradition with a design that balances precision engineering with user‑friendly features. Every component, from the LCD panel to the protective housing, is selected for durability and accuracy, ensuring that the meter delivers reliable data day after day.

Our commitment to customer satisfaction extends beyond the product itself. The ET920 comes with a comprehensive warranty and access to dedicated technical support, providing peace of mind for professionals who rely on dependable tools. Should you encounter any issues, our knowledgeable staff are ready to assist with troubleshooting, calibration advice, and replacement parts.

In addition, the ET920 is backed by a large community of users who share tips, best practices, and real‑world applications. This collaborative ecosystem helps you get the most out of your meter, whether you are performing routine maintenance or tackling complex power analysis tasks.

Key Features

• Accurate voltage (3‑20 V) and current (0.05‑3 A USB‑A, 0.05‑5 A USB‑C) measurement for reliable diagnostics.
• High‑resolution LCD ensures clear readings in bright or low‑light environments.
• Stores up to 10 readings for easy comparison and trend analysis.
• Built‑in overload detection protects devices and enhances safety on the job.
• Rugged, pocket‑size design with 2 m drop protection backed by responsive customer support.

FAQ

What types of USB ports can the ET920 test?

The ET920 supports both standard USB‑A and USB‑C ports. It measures voltage from 3 to 20 V and current up to 3 A on USB‑A connectors, while USB‑C ports can be measured up to 5 A, covering most modern charging and data standards.

How does the meter calculate resistance?

Resistance is derived from the measured voltage and current using Ohm’s law (R = V ÷ I). The meter performs this calculation automatically and displays the result on the LCD, allowing you to assess the health of cables and power sources without additional equipment.

Can I use the ET920 for continuous monitoring?

Yes. The device is designed for continuous operation and can log data for up to 1,000 hours. Its internal memory retains the last ten readings, making it suitable for long‑term monitoring of power performance in both field and lab settings.

Is the ET920 compatible with fast‑charging technologies?

Absolutely. The meter’s voltage range (3‑20 V) and current capabilities (up to 5 A on USB‑C) encompass Qualcomm Quick Charge, Power Delivery, and other fast‑charging protocols, allowing you to verify that these technologies are delivering the expected power levels.

What warranty and support does Klein Tools provide?

Klein Tools offers a limited warranty that covers manufacturing defects and includes access to technical support. If you have questions about setup, calibration, or troubleshooting, the support team is available to help you get the most out of your ET920 meter.