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Klein Tools ET120 Gas Leak Detector

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Overview

The Klein Tools ET120 Gas Leak Detector is a professional-grade, battery-powered tester designed for accurate detection of combustible gases, including methane, propane, butane, and natural gas. Ideal for HVAC technicians, homeowners, and RV owners, the ET120 quickly identifies gas leaks in tight or hard-to-reach areas.

Equipped with an 18-inch flexible gooseneck, the ET120 extends the sensor’s reach to pipelines, storage tanks, furnaces, and other confined spaces. The device features five red LED lights and an 85 dB audible alarm, which intensify as gas concentration rises, providing clear and immediate alerts. Its detection range spans 50–10,000 ppm, accommodating both low and high concentrations of combustible gases.

The detector includes automatic zero-point calibration at power-up to ensure accurate readings. Users can select high sensitivity (50–1000 ppm) or low sensitivity (1000–10,000 ppm) modes depending on inspection needs. Its over-molded, durable design ensures a comfortable grip for extended use while withstanding demanding work environments.

With an auto power-off function after 10 minutes of inactivity, the ET120 conserves battery life, ensuring long-lasting operation. Compact and portable, it is supplied with batteries, a carrying pouch, and an instruction manual for immediate use.

Key Features

  • Wide Detection Range: Detects gas concentrations from 50 to 10,000 ppm for methane, propane, and other combustible gases.
  • Adjustable Sensitivity: High mode (50–1000 ppm) and low mode (1000–10,000 ppm) for flexible detection needs.
  • Visual and Audible Alerts: Five red LED lights and 85 dB sound alert that intensifies with gas concentration.
  • Automatic Calibration: Zero-point calibration at power-up ensures accurate readings with flashing lights during self-check.
  • Flexible 18-Inch Gooseneck: Expands the sensor’s reach into pipelines, storage tanks, and other hard-to-reach areas.
  • Comfortable Grip: Over-molded body designed for prolonged use in demanding environments.
  • Battery Saving: Auto power-off after 10 minutes of inactivity conserves battery life.
  • Portable Design: Lightweight and easy to carry for field inspections and home use.
  • Complete Package: Includes batteries, carrying pouch, and user manual for immediate operation.

Specifications

  • Brand: Klein Tools
  • Model Number: ET120
  • Color/Variant: Black
  • Power Source: Battery Powered (4 x AAA included)
  • Detection Range: 50–10,000 ppm (based on Methane)
  • Sensitivity Levels: High (50–1000 ppm), Low (1000–10,000 ppm)
  • Alarm Type: Audible (85 dB) and Visual (5 LED lights)
  • Calibration: Automatic zero-point at power-up
  • Gooseneck Length: 18 inches
  • Operating Humidity: 85% max
  • Upper Temperature Rating: 122 °F
  • Item Dimensions: 1.79 in (D) x 2.71 in (W) x 28.3 in (H)
  • Item Weight: 13 oz (with batteries)
  • Enclosure Material: Blend
  • Auto Power-Off: 10 minutes (battery-saving feature)
  • Warranty: Standard Klein Tools warranty
  • Certifications: CE, RoHS, UL compliant

Ideal For

  • HVAC professionals inspecting pipelines and gas appliances
  • Homeowners performing routine safety checks for combustible gases
  • RV owners detecting leaks in onboard gas lines and appliances
  • Maintenance personnel checking storage tanks, furnaces, or gas lines
  • DIY users needing portable and accurate gas leak detection

Package Includes

  • 1 × Klein Tools ET120 Gas Leak Detector
  • 4 × AAA Batteries
  • 1 × Carrying Pouch
  • 1 × Instruction Manual

FAQs

What gases can the ET120 detect?
It detects methane, propane, natural gas, butane, and other combustible gases from 50–10,000 ppm.
How close should the sensor be to detect a leak?
Typically within 1–5 cm of the suspected leak, depending on gas concentration and source size.
Can the ET120 be used for continuous monitoring?
No. It is a handheld, portable tester designed for periodic checks and leak localization only.
How do I select the sensitivity level?
Users can choose high (50-1000 ppm) or low (1000-10,000 ppm) sensitivity based on the expected gas concentration.
How does the auto power-off feature work?
The detector powers off automatically after 10 minutes of non-use to conserve battery life.
How does the ET120 calibrate automatically?
Upon power-up, the device performs zero-point calibration, indicated by flashing lights, ensuring accurate readings.
Is the 18-inch gooseneck removable?
The gooseneck expands the sensor’s reach and clips onto the meter for storage, providing flexibility in detection.

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