1. Ifihan
The Klein Tools ET120 is a professional-grade combustible gas leak detector designed for HVAC professionals and general household use. It provides audible and visual alarms to indicate the presence of methane, propane, and other combustible gases. This manual provides essential information for the safe and effective operation of your ET120 gas leak detector.

olusin 1: Iwaju view of the Klein Tools ET120 Gas Leak Detector.
2. Alaye Aabo
IKILO: This Gas Detector is NOT intended for use as personal protective equipment (PPE). Always read, understand, and follow all instructions to ensure safe operation. Always turn on the gas detector in an area known to be free of combustible gases.
- Ma ṣe lo ẹrọ naa ti o ba han pe o bajẹ.
- Ensure proper ventilation when investigating gas leaks.
- Keep the device away from extreme temperatures and moisture.
- Rọpo awọn batiri ni kiakia nigbati atọka batiri kekere ba han.
3. Awọn ẹya Ọja
- Ibi Wiwa jakejado: Detects gas concentrations from approximately 50 to 10,000 ppm (based on Methane).
- Ifamọ ti o le ṣatunṣe: Offers High (50 to 1000 ppm) and Low (1000 to 10,000 ppm) sensitivity levels.
- Enhanced Alerts: Features five red LEDs (visual) and an 85dB audible alarm that intensifies with increasing gas concentration.
- Iṣatunṣe aifọwọyi: Performs automatic zero-point calibration at power-up for accuracy.
- Gooseneck to rọ: An 18-inch flexible gooseneck expands the sensor's reach and clips onto the meter for storage.
- Apẹrẹ ti o tọ: Over-molded body provides a comfortable grip and is built for demanding environments.
- Nfi batiri pamọ: Auto power-off after 10 minutes of non-usage conserves battery life.

Figure 2: Key features of the ET120 Gas Leak Detector.
4. Eto
4.1 Fifi sori batiri
The Klein Tools ET120 requires 4 AAA batteries (included). To install or replace batteries:
- Wa ideri iyẹwu batiri ni ẹhin ẹrọ naa.
- Open the cover and insert 4 AAA batteries, ensuring correct polarity (+/-).
- Ni aabo pa ideri kompaktimenti batiri ni aabo.

Figure 3: Battery compartment with batteries installed.
4.2 Iṣatunṣe Ibẹrẹ
The ET120 features automatic zero-point calibration. When the device is powered on, it will automatically calibrate itself to the ambient air. Ensure the device is powered on in an area known to be free of combustible gases for accurate calibration. Flashing lights will indicate the self-calibration process.
5. Awọn ilana Iṣiṣẹ
5.1 Agbara Tan / Pa
- To power on, press and hold the power button until the device activates.
- The device will perform an automatic self-calibration.
- To power off, press and hold the power button. The device also features an auto power-off function after 10 minutes of inactivity.
5.2 Ṣíṣe àtúnṣe Ìmọ́lára
The ET120 offers two sensitivity modes:
- Ifamọ giga: Approximately 50 to 1000 ppm. Use for detecting smaller leaks or when precise location is needed.
- Ifamọ Kekere: Approximately 1000 to 10,000 ppm. Use for detecting larger leaks or initial scanning of an area.
Press the 'LOW' or 'HIGH' buttons on the device to switch between sensitivity modes.
5.3 Gas Detection Process
To detect gas leaks:
- Rí i dájú pé ẹ̀rọ náà ti ṣiṣẹ́ dáadáa tí a sì ti ṣe àtúnṣe rẹ̀.
- Extend the 18-inch flexible gooseneck to reach the area to be inspected. The gooseneck can be clipped onto the meter for convenient storage when not in use.
- Slowly move the sensor tip of the gooseneck around potential leak sources.
- Observe the five red LED indicators and listen for the audible alarm. The intensity of both the visual and audible alerts will increase as the gas concentration rises, indicating proximity to a leak.
- Use the 'HOLD' button to freeze the current reading on the display if needed.

Figure 4: Using the ET120 to detect gas leaks.
5.4 dakẹ Išė
The audible alarm can be muted by pressing the speaker icon button. Press it again to unmute.
Awọn fidio ọja osise
Watch these official videos for a visual guide on using the Klein Tools ET120 Gas Leak Detector:
Video 1: Klein Tools ET120 Gas Leak Detector overview and demonstration. This video shows the device being unboxed and used to check for gas leaks around a propane tank, demonstrating its sensitivity and flexible gooseneck.
Fidio 2: Ọja Pariview Video for the Klein Tools ET120. This video highlights the main features and benefits of the gas leak detector, including its design and functionality.
6. Itọju
- Ninu: Wipe the device with a dry, lint-free cloth. Do not use abrasive cleaners or solvents.
- Ibi ipamọ: Store the device in its carrying pouch in a cool, dry place away from direct sunlight and extreme temperatures.
- Itọju Batiri: Yọ awọn batiri kuro ti ẹrọ naa ko ba ni lo fun igba pipẹ lati ṣe idiwọ jijo.
7. Laasigbotitusita
- Ẹrọ ko ṣiṣẹ lori: Ṣayẹwo fifi sori batiri ati rii daju pe awọn batiri ko dinku. Rọpo ti o ba wulo.
- Awọn kika ti ko pe: Ensure the device was calibrated in a clean, gas-free environment. Recalibrate if needed.
- No audible alarm: Check if the mute function is activated. Press the speaker icon button to unmute.
8. Awọn pato
| Sipesifikesonu | Iye |
|---|---|
| Brand | KLỌN irinṣẹ |
| Nọmba awoṣe | ET120 |
| Ara | Gaasi Isun |
| Orisun agbara | Agbara Batiri |
| Àwọ̀ | Dudu |
| Ọja Mefa | 1.79"D x 2.71"W x 28.3"H |
| Iwọn Nkan | 13 iwon |
| Itaniji | Audible, Visual Notification |
| Ọriniinitutu ti nṣiṣẹ | 85 ogorun |
| Ohun elo | Darapọ |
| Awọn batiri ti a beere | Awọn batiri AAA 4 (pẹlu) |
| Pataki Awọn ẹya ara ẹrọ | Audible Alert, Auto-Power Off, Visual Notification |
9. Atilẹyin ọja ati Support
For warranty information, please refer to the attached warranty document that came with your product. For technical support or further assistance, please contact Klein Tools customer service.





