Klein Tools ET120 Gas Leak Detector — 18-Inch Gooseneck, 50–10,000 ppm, Includes Pouch & Batteries

Overview

The Klein Tools ET120 Gas Leak Detector is built for HVAC professionals who need quick, reliable readings in busy or tight work environments. Its 18 inch flexible gooseneck helps you probe behind equipment and into narrow spaces, while audible and visual cues provide immediate feedback as you explore a space.

With a detection range from about 50 to 10 000 ppm, this tester covers both small leaks and more noticeable concentrations. You can tailor readings with two sensitivity levels: High for close inspection and Low for broader sweeps. Automatic zero point calibration occurs at power up for consistent accuracy, and the indicator lights along with a loud alarm reinforce your awareness as gas levels change.

Key features

• Wide detection range from 50 to 10 000 ppm for versatile monitoring
• Adjustable High and Low sensitivity to fit your task
• Five red LEDs plus an 85 dB audible alert that intensifies with concentration
• Automatic zero-point calibration at power up for quick setup
• 18 inch flexible gooseneck that reaches into confined spots
• Over molded durable housing and comfortable grip for daily use
• Auto power-off after 10 minutes of non use to save battery life
• Includes protective pouch and batteries for immediate use

Real world use and benefits

On the job you might move through mechanical rooms, crawl spaces, and behind appliances. The ET120 is designed to be intuitive in such environments, offering clear feedback as you work. The long gooseneck helps you access awkward corners without removing equipment, while the visual and audible alerts provide a non intrusive way to confirm gas presence as you perform checks.

• Quickly scan interior compartments for methane and propane traces during service calls
• Inspect ductwork or behind heavy equipment without disassembly
• Use the alarms to corroborate a suspected leak before proceeding with a repair

What’s included

Comes with a protective pouch and the required batteries, so you can power up and start testing right away. Klein Tools brings decades of professional engineering to a tool designed for daily field use, combining dependable performance with thoughtful usability.