A complete product kit for the Klein Tools ET120 featuring the combustible gas leak detector with its 18-inch flexible gooseneck, a custom black padded storage pouch with an orange zipper, and four AAA batteries.
Product feature infographic for the Klein Tools ET120 highlighting its detection range of 50 to 10,000 ppm for Methane and Propane. Icons call out the dual sensitivity levels, audible and visual LED alarms, 18-inch flexible gooseneck, and a 2-meter drop protection rating.
Front view of the Klein Tools ET120 gas detector showcasing the intuitive control interface. The image highlights the five-tier red LED visual alarm bar and buttons for high/low sensitivity selection, power, and the 85dB audible alert toggle.
Action shot of an HVAC professional using the ET120 gas leak detector to inspect a gas line joint. The 18-inch flexible gooseneck is shown maneuvering into a tight space, demonstrating the tool's effectiveness for residential and commercial plumbing diagnostics.
A technician using the Klein Tools ET120 to probe for gas leaks along a yellow corrugated stainless steel tubing (CSST) line. The flexible gooseneck is bent to position the sensor tip precisely at the connection point, illustrating the tool's versatility.
Perspective shot of the ET120 focusing on the over-molded ergonomic grip and the sensor storage clip. The 18-inch flexible gooseneck is shown coiled and clipped to the side of the housing for compact storage and protection.
Close-up of the ET120 sensor head and the 18-inch flexible gooseneck extended for use. The image emphasizes the rugged construction of the gooseneck and the specialized sensor tip designed to detect methane and propane gas concentrations.
Full back-profile view of the Klein Tools ET120 combustible gas leak detector. This view highlights the high-impact polymer housing, the intuitive thumb-controlled buttons, and the flexible 18-inch gooseneck probe in its fully extended position.
A technician troubleshooting a commercial HVAC unit using the ET120 gas leak detector. The flexible probe is reaching into the internal mechanical components to verify the integrity of the gas valves and fittings.
Combustible Gas Leak Detector (ET120) promotional how to video
A complete product kit for the Klein Tools ET120 featuring the combustible gas leak detector with its 18-inch flexible gooseneck, a custom black padded storage pouch with an orange zipper, and four AAA batteries.
Product feature infographic for the Klein Tools ET120 highlighting its detection range of 50 to 10,000 ppm for Methane and Propane. Icons call out the dual sensitivity levels, audible and visual LED alarms, 18-inch flexible gooseneck, and a 2-meter drop protection rating.
Front view of the Klein Tools ET120 gas detector showcasing the intuitive control interface. The image highlights the five-tier red LED visual alarm bar and buttons for high/low sensitivity selection, power, and the 85dB audible alert toggle.
Action shot of an HVAC professional using the ET120 gas leak detector to inspect a gas line joint. The 18-inch flexible gooseneck is shown maneuvering into a tight space, demonstrating the tool's effectiveness for residential and commercial plumbing diagnostics.
A technician using the Klein Tools ET120 to probe for gas leaks along a yellow corrugated stainless steel tubing (CSST) line. The flexible gooseneck is bent to position the sensor tip precisely at the connection point, illustrating the tool's versatility.
Perspective shot of the ET120 focusing on the over-molded ergonomic grip and the sensor storage clip. The 18-inch flexible gooseneck is shown coiled and clipped to the side of the housing for compact storage and protection.
Close-up of the ET120 sensor head and the 18-inch flexible gooseneck extended for use. The image emphasizes the rugged construction of the gooseneck and the specialized sensor tip designed to detect methane and propane gas concentrations.
Full back-profile view of the Klein Tools ET120 combustible gas leak detector. This view highlights the high-impact polymer housing, the intuitive thumb-controlled buttons, and the flexible 18-inch gooseneck probe in its fully extended position.
A technician troubleshooting a commercial HVAC unit using the ET120 gas leak detector. The flexible probe is reaching into the internal mechanical components to verify the integrity of the gas valves and fittings.
Combustible Gas Leak Detector (ET120) promotional how to video
KLEIN TOOLS

Klein Tools ET120 Combustible Gas Leak Detector for Methane Propane and Natural Gas with 18 Inch Flexible Gooseneck Audible and Visual LED Alarms

Only 1 left
SKU: ET120
$129.97

Description

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Pinpoint Hidden Hazards: Professional-Grade Gas Leak Detection for Methane, Propane, and Combustible Gases

The Klein Tools ET120 Combustible Gas Leak Detector is a critical diagnostic tool engineered for HVAC professionals, plumbers, and maintenance technicians who demand absolute reliability in leak detection. This high-sensitivity tester identifies methane, propane, and other combustible gases at concentrations as low as 50 ppm, allowing you to catch small leaks before they become major safety hazards. Whether you are inspecting residential gas lines, checking commercial boiler rooms, or troubleshooting HVAC furnace systems, the ET120 provides the precision needed to secure the job site.

Equipped with an 18-inch flexible gooseneck, the ET120 easily navigates into tight, hard-to-reach spaces like behind appliances or deep within mechanical enclosures. The device features two levels of sensitivity (High and Low) and provides instant feedback through a tiered system of five red LEDs and an 85dB audible alarm that increases in intensity as gas concentration rises. Built with a rugged, over-molded body for a comfortable and secure grip, this "Klein Tough" meter includes automatic zero-point calibration at startup to ensure consistent accuracy throughout your workday.

Key Features

  • Broad Detection Range: Effectively detects Methane, Propane, and other combustible gases from 50 to 10,000 ppm.
  • Dual Sensitivity Modes: High Sensitivity (50 to 1,000 ppm) and Low Sensitivity (1,000 to 10,000 ppm) for versatile diagnostics.
  • Multi-Sensory Alerts: Features a high-decibel 85dB audible alarm and 5-tier red LED visual indicators.
  • 18-Inch Flexible Gooseneck: Extended reach for probing tight joints, valves, and confined areas.
  • Auto-Calibration: Automatic zero-point calibration at power-up ensures the unit is ready for immediate, accurate use.
  • Rugged Durability: Over-molded housing provides a comfortable, slip-resistant grip and jobsite protection.
  • Power Management: Auto power-off after 10 minutes of inactivity to maximize the life of the 4 included AAA batteries.

What's Included

  • (1) ET120 Combustible Gas Leak Detector
  • (1) Protective Storage Pouch
  • (4) AAA Alkaline Batteries
  • (1) Instruction Manual

Specifications

Detection Range 50 to 10,000 ppm (Methane Based)
Audible Alert 85dB Ticking (Increases with concentration)
Visual Alert 5 Red LEDs
Gooseneck Length 18 Inches
Batteries 4 x AAA (Included)
Auto Power-Off Yes (10 Minutes)
Display Type Digital LED Bar
Overall Length 28.31 Inches
Overall Width 1.78 Inches
Overall Height 2.75 Inches
Weight 13 oz
UPC 092644690648

Pro-Tip: To ensure the most accurate leak identification, always power on the ET120 in a "clean air" environment (away from the suspected leak) to allow the automatic zero-point calibration to set correctly. Once the self-calibration is complete, move the sensor tip slowly along the gas line joints and fittings for best results.