1. Introducció
The HT609 Gas Leak Detector is a portable and highly sensitive device designed for the rapid and reliable detection of combustible gas leaks. Equipped with an LCD display, it provides clear readings of gas concentration, ambient temperature, and humidity. Its audible and visual alarm system ensures immediate notification of potential hazards, making it an essential tool for safety in various environments.

Figure 1: HT609 Gas Leak Detector, showing its LCD screen and controls.
2. Informació de seguretat
Si us plau, llegiu atentament totes les instruccions de seguretat abans de fer funcionar el dispositiu.
- Always power on the device in a clean, fresh air environment and allow it to complete its preheating cycle (approximately 30 seconds) before use. This ensures accurate calibration.
- Do not use the detector in environments with extremely high concentrations of gas, as this may pose an explosion risk.
- Keep the device away from water and excessive humidity, unless specified for such conditions.
- No intenteu desmuntar ni modificar el dispositiu. Encarregueu tot el manteniment a personal qualificat.
- Ensure batteries are inserted correctly and replace them when the low battery indicator appears to maintain optimal performance.
3. Característiques del producte
- Combustible Gas Detection: Detects a wide range of combustible gases with quick response times.
- Pantalla LCD: Clear digital and analog bar display for gas concentration, ambient temperature, and humidity.
- Alarma audible i visual: Features a buzzer and indicator light that intensify with increasing gas concentration. The backlight changes from green to orange and then to red as the signal increases.
- Ambient Temperature and Humidity Measurement: Integrated high-precision sensors provide accurate environmental readings.
- Apagat automàtic: Automatically shuts down after 10 minutes of no operation or detection signal to conserve battery life.
- Selecció de sensibilitat: Offers High, Mid, and Low sensitivity settings to adapt to different detection scenarios.
4. Contingut del paquet
En obrir el paquet, comproveu que tots els elements que s'enumeren a continuació hi són presents i que es troben en bon estat:
- 1 x HT609 Gas Leak Detector
- 1 x bossa de tela
- 1 manual d'usuari (anglès)
5. Configuració
5.1 Instal·lació de la bateria
- Localitzeu el compartiment de la bateria a la part posterior del dispositiu.
- Obriu la tapa del compartiment de la bateria.
- Insert 3 x 1.5V AAA Alkaline batteries, ensuring correct polarity (+/-).
- Tanqueu bé la tapa del compartiment de la bateria.
5.2 Initial Power-On and Warm-Up
- Ensure the device is in a clean, fresh air environment, free from any gas.
- Manteniu premut el botó d'encesa (U) per encendre el dispositiu.
- The LCD display will show "WAIT..." and a countdown. The device will undergo a warm-up period of approximately 30 seconds for sensor stabilization.
- Once the warm-up is complete, the device is ready for use.
6. Instruccions de funcionament
6.1 Encès/Apagat
- Per engegar: premeu i manteniu premut el botó d'engegada (U).
- Per apagar: premeu i manteniu premut el botó d'engegada (U) again until the display turns off.
6.2 Selecció de sensibilitat
The HT609 offers three sensitivity levels: High (SENS-H), Medium (SENS-M), and Low (SENS-L).

Figure 2: LCD display indicating different sensitivity levels and alarm thresholds.
- Premeu el botó SENS button to cycle through the sensitivity levels: Low → Medium → High.
- Select the appropriate sensitivity based on your detection needs. High sensitivity is for detecting very small leaks, while Low sensitivity is for larger leaks or to avoid nuisance alarms in slightly contaminated areas.
6.3 Understanding the LCD Display and Alarms
La pantalla LCD proporciona informació en temps real:
- Analog Bars: Indicate the relative gas concentration. The number of illuminated bars increases with higher gas levels.
- Digital Reading: Shows the precise gas concentration (if applicable), ambient temperature, and humidity.
- Indicadors d'alarma:
- Zumbador: An audible alarm that increases in frequency and intensity as gas concentration rises.
- Color de la llum de fons: The screen backlight changes color based on gas concentration:
- Green: Safe/Low concentration.
- Orange: Medium concentration/Warning.
- Red: High concentration/Danger.
- Unitats de temperatura: Premeu el botó ° C / ° F button to switch between Celsius and Fahrenheit for temperature display.
6.4 Performing a Gas Leak Detection
- After warm-up, move the sensor probe slowly along the suspected gas line or area where a leak is suspected.
- Observe the LCD display and listen for the audible alarm.
- If gas is detected, the analog bars will increase, the buzzer will sound more frequently, and the backlight color will change according to the concentration.
- Pinpoint the source of the leak by moving the probe until the alarm is strongest.

Figure 3: HT609 in use, detecting natural gas leakage from a cylinder.

Figure 4: HT609 used for inspecting a water heater gas line.

Figure 5: HT609 performing a natural gas/gas line inspection.
7. Manteniment
7.1 Neteja
- Netegeu el dispositiu amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Keep the sensor area clean and free from dust or debris to ensure accurate readings.
7.2 Substitució de la bateria
Replace the batteries when the low battery indicator appears on the LCD display. Refer to Section 5.1 for battery installation instructions.
7.3 Emmagatzematge
When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight and extreme temperatures. Remove batteries if storing for more than a month to prevent leakage.
- Storage Conditions: -10°C ~ 60°C (14°F ~ 140°F) / 20% ~ 80%RH
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El dispositiu no s’encén. | Les bateries estan esgotades o instal·lades incorrectament. | Canvieu les piles o comproveu la polaritat. |
| Inaccurate readings or no detection. | Sensor is dirty or blocked; Device not warmed up; Incorrect sensitivity setting. | Clean sensor area; Allow full warm-up; Adjust sensitivity. |
| Constant alarm in clean air. | Device not warmed up in fresh air; Sensor contamination. | Power off, move to fresh air, and restart; Clean sensor. |
| Auto power off too soon. | No operation or detection signal for 10 minutes. | This is a normal power-saving feature. Restart the device if needed. |
9. Especificacions

Figure 6: Dimensions of the HT609 Gas Leak Detector.
| Paràmetre | Valor |
|---|---|
| Mostra | LCD |
| Material de closca | ABS |
| Sensor | Gas-sensitive semiconductor |
| Interval de resposta | 50PPM ~ 1000PPM (Methane) |
| Sensibilitat | > 50PPM (Methane) |
| Test Gases (Partial List) | Acetone, Acetylene, Ammonia, Benzene, Butane, Ethanol, Oxirane, Gasoline, Hexane, Hydrogen, Methane, Naphtha, Natural Gas, Paint Thinners, Propane, Solvents, etc. |
| Temps d'escalfament | Aprox. 30 segons |
| Temps de resposta | ≤500PPM: Approx. 5sec; >500PPM: Approx. 2sec |
| Mode d'alarma | Buzzer and indicator light (backlight color change) |
| Selecció de sensibilitat | Alt / Mitjà / Baix |
| Interval de temperatura ambient | -20.0 °C ~ 60.0 °C (-4.0 °F ~ 140.0 °F) |
| Ambient Temperature Precision | 0.0°C ~ 45.0°C (32°F ~ 113°F): ±1.0°C / 2.0°F; Other: ±1.5°C / 3.0°F |
| Ambient Temperature Resolution | 0.1/1 |
| Interval d'humitat ambiental | 0.0% ~ 99.9% HR |
| Ambient Humidity Precision | 20% ~ 80%: ±5.0RH; Other: ±6.0RH |
| Unitats de temperatura | ° C / ° F |
| Condicions de funcionament | 0 ~ 50°C / 20 ~ 80%RH |
| Condicions d'emmagatzematge | -10 ~ 60°C / 20 ~ 80%RH |
| Bateries | 3 x 1.5V AAA Alkaline battery (not included) |
| Mida de l'article | 14.2 x 5.8 x 2.6 cm / 5.59 x 2.28 x 1.02 polzades |
| Pes net | 115 g / 4.06 oz |
| Mida de l'embalatge | 18.5 x 9 x 5.5 cm / 7.28 x 3.54 x 2.17 polzades |
| Pes de l'embalatge | 193 g / 6.81 oz |

Figura 7: Examples of combustible gases detectable by the HT609.

Figure 8: Illustration of the rapid induction semiconductor sensor technology.
10. Garantia i Suport
Specific warranty information for the Irfora HT609 Gas Leak Detector is not provided within this manual. Please refer to the product packaging, purchase receipt, or the retailer's weblloc web per obtenir més informació sobre la cobertura i els termes de la garantia.
For technical support, troubleshooting assistance beyond what is covered in this manual, or inquiries about replacement parts, please contact the seller or manufacturer directly through the contact information provided at the point of purchase or on their official weblloc.





