Gas Detector

A Gas detector is a device designed to detect the presence of various gases in the environment. It functions by using sensors that can identify specific gas molecules. These detectors are crucial for safety as they can alert users to potentially dangerous gas levels, such as those in industrial settings, where gas leaks could lead to explosion or harm to workers. They also play a key role in monitoring air quality in buildings, ensuring that the air is free from harmful pollutants like carbon monoxide. In addition, gas detectors are used in homes to detect natural gas leaks, protecting residents from potential fire or asphyxiation.

Methane concentration exceeded alarm
Off-line alarm
Anti-dismantling alarm

Smart phone APP notification
SMS/TTS Notification
Email Notification

NB-loT/ CAT.1/LoRa/Wifi/Zigbee

AC 12V

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Explanation of Working States

Normal Standby: After power-on preheating, the device is in the normal standby state, and the green light flashes slowly (once every 2 seconds).
Manual Self-check: In the normal standby state, long-press the test button. All indicator lights flash quickly, the buzzer sounds, and self-check information is sent to the platform. When the button-pressing time exceeds 8 seconds, it will trigger the closing of the gas valve by the interface of the manipulator, solenoid valve, etc., and at the same time, send a gas alarm and an alarm recovery signal to the platform. If the external device is a manipulator, the manipulator will automatically open the valve 12 seconds later. When the button-pressing time exceeds 15 seconds, the manipulator will not automatically open the valve after closing.
Alarm: When the combustible gas exceeds the set concentration, the product starts audible and visual alarms. The red light flashes, the buzzer sounds, and it drives the manipulator or solenoid valve to close the gas valve.
Alarm Recovery: When the gas concentration is lower than the alarm set value, the alarm automatically returns to the normal standby state (the red light stops flashing, the buzzer stops sounding, and the green light flashes slowly). After the alarm recovery, the manipulator will not automatically open the gas valve. You can manually operate the valve and the manipulator to make the manipulator open the valve, or in the normal standby state, manually press the self-check button for about 10 seconds to trigger the opening action of the manipulator valve, and finally open the valve. If an external solenoid valve is connected, the valve can only be opened manually and cannot be opened automatically.
Mute: When the product is in the alarm state, press the test button once, and the product will turn off the buzzer sound while the red light flashing state remains unchanged. The upper limit of the single-press mute time is 90 seconds. If the gas concentration still exceeds the alarm value after 90 seconds, the product will sound the alarm again. After the alarm recovery, the mute state is automatically activated， and it does not affect the next audible and visual alarm.
Sensor Lifespan Expired: Sensors have their service life. When the sensor expires, the yellow indicator light of the sensor stays on, and the buzzer keeps sounding, indicating that the sensor needs to be replaced. Please turn off the power and replace the new alarm.
Sensor Malfunction: If the sensor malfunctions within its service life, the yellow indicator light of the sensor flashes quickly, and the buzzer keeps sounding.

Storage and Service Life

Storage environment: Store in a dry, ventilated environment with a temperature of 0 – 40°C.
Avoid storing in a high-humidity, high-temperature, or highly polluted environment.
Service life: Up to five years.

Troubleshooting

This product must be wired correctly and have a normal power supply; otherwise, it cannot work properly.
This product needs to be regularly maintained according to the requirements of the instruction manual.
The detector has a limited service life and should be tested once every six months. If it fails, it must be repaired or replaced as soon as possible.
This product can reduce the occurrence of accidents, but it cannot guarantee absolute safety. For your safety, in addition to using this product correctly, you should be more vigilant and enhance your safety awareness in daily life.
For long-term storage, the product needs to be aged before it can be used normally. For short-term storage (within two weeks), it will stabilize after 8 hours. For long-term storage (more than one year), it needs to operate for 48 hours to stabilize.

First Aid Knowledge for Gas Leakage

When the concentration of combustible gas in the ambient air reaches or exceeds the detector’s threshold, the detector will keep alarming. At this time, you should:

Turn off the main valve of the gas pipeline.
Immediately open the windows to ventilate the indoor air.
Extinguish all sources of fire and avoid using anything that can generate sparks, such as lighters and matches.
Avoid switching on and off various electrical appliances, detect the cause of the gas leakage, and notify the relevant departments or professionals.
If it is a false alarm, check whether the installation location of the detector is appropriate.

Product Parameters	Details
Detected Gas	Methane (CH₄) (Natural Gas)
Static Current	Less than 100mA
Alarm Concentration	8LEL ± 3LEL
Product Lifespan	5 years
Operating Temperature	– 10°C to + 55°C
Installation Method	Wall – mounted/Ceiling – mounted
Working Voltage	AC 220V/50Hz
Alarm Sound Pressure	70dB (at 1 meter in the front)
Sampling Method	Natural Diffusion
Driving Capacity	12V (200mA continuous for manipulator, 2A pulse for solenoid valve)
Working Humidity	Less than 95%RH
Dimensions	104mm * 31.7mm

This product should be installed within 1.5 meters of the gas source.
- a. When detecting gases heavier than air: Install it at least 0.5 meters above the ground.
- b. When detecting gases lighter than air: Install it at least 0.5 meters below the ceiling.
- c. Fix the installation base plate to the wall with screws, hang the detector, and plug in the power supply.
The installation location should not be too close to the gas-fired stove, to prevent the detector from being baked by the stove fire. Do not install it in places with heavy fumes, to avoid false alarms or poor air flow through the detector’s air inlet, which may affect the detector’s sensitivity. Also, do not install it near exhaust fans, doors, windows, or in areas with high humidity like bathrooms.
Connect the wires correctly according to the left-hand diagram. All wiring installations must comply with national and local effective regulations and standards. Select wires with appropriate core thickness. The wires connecting the probe and auxiliary devices should have color markings to avoid wrong connections. Incorrect wiring will cause the probe to malfunction.
According to the requirements shown in the picture, install the corresponding functional SIM card in the SIM card slot (for NB-IoT version products, an NB-IoT IoT card needs to be installed; for Cat.1 version products, a Cat.1 IoT card needs to be installed).
As shown in the picture, set the product output mode jumper. The jumper setting (for the manipulator or solenoid valve) must match the actual externally connected driving device. Otherwise, it may cause damage to the driving device.
Connect the power supply. The circuit enters the pre-heating state. All indicator lights turn on once, and then the green indicator light stays on as the device enters the pre-heating state.
The pre-heating generally takes 3 minutes. During the pre-heating process, the device will perform self-checks on the sensor, SIM card, and platform communication. After the pre-heating is completed, the indicator lights will show the self-check results.

Self-check Results	Problem Causes	Abnormal Handling
The yellow light stays on, and the buzzer keeps sounding	Sensor lifespan expired	Contact the supplier
The yellow light flashes, and the buzzer keeps sounding	Sensor malfunction	Contact the supplier
The green light flashes once and lasts for 60 seconds	Self-check successful, signal strength < 5, extremely poor	Find out the reasons for the poor signal
The green light flashes twice and then flashes for 3 rounds	Self-check successful, signal strength 5 – 10, poor	Find out the reasons for the poor signal
The green light flashes three times and then flashes for 3 rounds	Self-check successful, signal strength 11 – 16, average	Find out the reasons for the poor signal
The green light flashes four times and then flashes for 3 rounds	Self-check successful, signal strength > 16, good	–
The red light flashes once and lasts for 60 seconds	Communication failure, communication hardware malfunction	Contact the supplier
The red light flashes twice and lasts for 60 seconds	Communication failure, SIM card malfunction	Check whether the SIM card is inserted in the wrong direction, whether it has expired, whether it is activated, and whether it has been bound to other devices
The red light flashes three times and lasts for 60 seconds	Communication failure, no signal	Check whether there is an NB-IoT/Cat.1 signal locally. If it is confirmed that there is a signal locally, return the device to the factory for repair
The red light flashes four times and lasts for 60 seconds	Communication failure: The device has not been added to the telecom platform	Check whether the device IMEI is registered on the alarm platform. If it is already registered, contact the business personnel and arrange technical handling