1. Introduzione
This user manual provides essential information for the safe and effective operation of your SMART SENSOR AS8909 Portable H2 Gas Detector. This device is designed for accurately detecting hydrogen gas (H2) concentrations in various environments, ensuring safety by alerting users to potentially hazardous levels.
Si prega di leggere attentamente il presente manuale prima di utilizzare il dispositivo e di conservarlo per riferimento futuro.
2. Informazioni sulla sicurezza
ATTENZIONE: la mancata osservanza di queste istruzioni di sicurezza può provocare lesioni gravi o mortali.
- Utilizzare sempre il dispositivo secondo le istruzioni fornite nel presente manuale.
- Non tentare di modificare o riparare il dispositivo. Per qualsiasi intervento di assistenza, rivolgersi a personale qualificato.
- Ensure the device is regularly calibrated to maintain accuracy. Inaccurate readings can lead to dangerous situations.
- This device is designed to detect hydrogen gas. It may not detect other hazardous gases.
- The device is certified with GB3836 series anti-explosion standard, ensuring its safe operation in potentially explosive atmospheres. However, always exercise extreme caution in such environments.
- Keep the device away from strong electromagnetic fields, extreme temperatures, and corrosive substances.
3. Prodotto finitoview
The SMART SENSOR AS8909 is a compact and portable hydrogen gas detector featuring a high-sensitivity electrochemical sensor and a clear LCD display.
3.1. Componenti del dispositivo

Figura 3.1: Fronte view of the AS8909 H2 Gas Detector.

Figure 3.2: Labeled diagram showing key components including the high sensitive sensor, sampling pump connecting port, high density LCD screen with backlight, down button, up button, sound alarm, light alarm, confirm button, power on/off button, and battery charging port.
- High Sensitive Sensor: Located at the top, responsible for detecting H2 gas.
- Sampling Pump Connecting Port: For attaching an external sampling pump if needed.
- High Density LCD Screen: Displays H2 concentration, battery status, and other information. Features a backlight for visibility in dark conditions.
- Pulsanti di controllo: Includes Up, Down, Confirm, and Power On/Off buttons for navigation and settings adjustment.
- Indicatori di allarme: Integrated sound alarm, light alarm, and vibration alarm to alert users to gas presence.
- Porta di ricarica della batteria: Located at the bottom for recharging the built-in Li-battery.
3.2. Dimensions and Portability

Figure 3.3: The AS8909 detector measures approximately 120.2mm (height) x 64.5mm (width) x 38.3mm (depth), making it compact and easy to carry.

Figure 3.4: The compact design and unique clip allow for convenient portability, fitting comfortably in hand.
3.3. Caratteristiche dell'allarme

Figure 3.5: The device features three distinct alarm types: audible (sound alarm), visual (light alarm), and tactile (vibration alarm). It differentiates between low and high alarm values with varying frequencies of alarming noise.
3.4. Caratteristiche principali

Figura 3.6: dettagliata views of the soft, comfortable buttons, the imported electrochemical sensor for accurate detection, the integrated rechargeable Li-battery, and the large, clear LCD screen.
3.5. Lista di imballaggio

Figure 3.7: The standard package includes the H2 gas monitor, user manual, charging adaptor, USB cable, hand carry case, calibration certificate, CNEX certificate, and a gift paper box.
3.6. Video di unboxing del prodotto
Video 3.1: This video demonstrates the unboxing and contents of the AS8909 H2 Gas Detector package, showing the device and its accessories.
4. Impostazione
4.1. Ricarica iniziale
- Connect the provided USB cable to the charging adaptor.
- Plug the charging adaptor into a standard power outlet.
- Connect the USB cable to the battery charging port at the bottom of the detector.
- Allow the device to charge fully before first use. The battery indicator on the LCD screen will show charging status. A full charge typically provides 10-12 hours of continuous operation.
4.2. Prima accensione
- Press and hold the Power On/Off button until the LCD screen illuminates.
- The device will perform a self-test and warm-up sequence. During this time, avoid exposing it to gas.
- Once the self-test is complete, the display will show '0 PPM' or the current ambient H2 concentration, indicating it is ready for use.
5. Istruzioni per l'uso
5.1. Accensione/spegnimento
- Per accendere: Press and hold the Power On/Off button for approximately 3 seconds until the screen lights up.
- Per spegnere: Press and hold the Power On/Off button for approximately 3 seconds. The screen will display a countdown or a power-off message before shutting down.
5.2. Misurazione
- Once powered on and warmed up, the device continuously monitors the H2 gas concentration in its immediate environment.
- The real-time H2 concentration (in PPM) is displayed prominently on the LCD screen.
- For specific areas, hold the detector steadily in the desired location. If using a sampling pump, ensure it is correctly attached and functioning.
5.3. Alarm Settings and Response
The AS8909 features adjustable high and low alarm values. Factory preset low alarm value is 50ppm, and high alarm value is 100ppm.
- Regolazione dei valori di allarme: Refer to the detailed instructions in the full user manual (provided in the package) for navigating the menu using the Up, Down, and Confirm buttons to set custom alarm thresholds.
- Attivazione allarme: When the detected H2 concentration reaches or exceeds the preset low or high alarm values, the device will activate its alarms: audible sound (up to 80dB), flashing light, and vibration.
- Risposta agli allarmi: If an alarm sounds, immediately take appropriate safety measures, such as evacuating the area, ventilating the space, and identifying the source of the gas leak. Do not re-enter the area until the H2 concentration has returned to safe levels.
6. Manutenzione
6.1. Pulizia
- Pulire l'esterno del dispositivo con un panno morbido, damp panno. Non usare detergenti abrasivi o solventi.
- Ensure no liquid enters the sensor opening or charging port.
6.2. Cura della batteria
- Recharge the battery when the low battery indicator appears on the LCD screen.
- Evitare di scaricare completamente la batteria frequentemente, poiché ciò può ridurne la durata.
- If storing the device for an extended period, charge the battery to approximately 50% and recharge every 3-6 months to prevent deep discharge.
6.3. Calibrazione
Regular calibration is crucial for maintaining the accuracy and reliability of your gas detector. It is recommended to have the device calibrated by a qualified professional at least once a year, or more frequently depending on usage and environmental conditions. Refer to the calibration certificate included in your package for details.
7. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Il dispositivo non si accende. | Batteria scarica o scarica. | Carica completamente il dispositivo utilizzando il caricabatterie in dotazione. |
| Letture imprecise o fluttuanti. | Sensor contamination or damage; device needs calibration. | Clean the sensor area carefully. Contact professional service for calibration or repair. |
| Alarm does not sound/light/vibrate. | Alarm settings are off; speaker/LED/vibrator malfunction. | Check alarm settings in the menu. If problem persists, contact support. |
| Il dispositivo si blocca o non risponde più. | Problema software. | Perform a soft reset by holding the power button until it shuts down, then restart. If unresponsive, allow battery to drain completely then recharge. |
Se riscontri problemi non elencati qui o se le soluzioni suggerite non risolvono il problema, contatta l'assistenza clienti.
8. Specifiche
| Caratteristica | Specificazione |
|---|---|
| Marca | SENSORE INTELLIGENTE |
| Modello | AS8909 |
| Tipo di gas | Hydrogen gas (H2) |
| Intervallo di misurazione del gas | 0~1000 ppm |
| Risoluzione | 1 ppm |
| Principio di funzionamento | Sensore elettrochimico |
| Tipo di allarme | Sound, Light, Vibration (adjustable values) |
| Livello sonoro dell'allarme | Fino a 80 dB |
| Temperatura di esercizio | -10~50°C |
| Umidità di esercizio | 15~95%RH (standard) |
| Temperatura di conservazione | Temperatura da 0 a 40°C |
| Fonte di alimentazione | 3.7V rechargeable Li-battery (Built-in) |
| Operazione corrente | 160mA |
| Corrente di cortocircuito | <3A |
| Livello di protezione | Grado di protezione IP65 |
| Outer Enclosure Material | Plastica ABS |
| Peso netto del prodotto | 200g |
| Dimensioni | 120.2 x 64.5 x 38.3 mm |
| Codice UPC | 785197913837 |
9. Garanzia e supporto
Your SMART SENSOR AS8909 Portable H2 Gas Detector comes with a standard manufacturer's warranty. Please refer to the warranty card included in your product package for specific terms and conditions, including the warranty period and coverage details.
For technical support, troubleshooting assistance, or warranty claims, please contact SMART SENSOR customer service. Contact information can typically be found on the product packaging, the official SMART SENSOR website, or the included warranty card.
It is recommended to register your product online (if applicable) to facilitate warranty service and receive important product updates.





