LoRaWAN Combustible gas detector (type GDA-TW)

The gas dectector is a highly stable combustible gas detector (hereinafter referred to as the detector). Used to detect leaks of combustible gases. The detector uses advanced semiconductor gas sensing elements. It has the characteristics of stable operation, long service life, and simple installation. The detector is equipped with a built-in MCU for central control processing, and each functional gauge block is directly or indirectly connected to the I/O port line of the MCU. By solidifying the program inside the MCU to complete the normal operation of each functional module of the detector, the detector can work more stably, safely, and reliably. This product is suitable for safety monitoring in homes, real estate villas, hotels, apartments and other places with combustible gases.

Main Technical indicators

Functions and Features

· High reliability sensors

· Automatic reset

· Using microprocessor control

· Automatic fault detection indication

· Detection of natural, liquefied petroleum gas, etc

· Active upload/bidirectional transparent transmission function: When an alarm occurs, data is actively transmitted to the corresponding platform through the LoRaWAN wireless network; 

Upload normal information every 24 hours (configurable); Real time response platform issuing instructions.

Operating instructions

Installation and wiring

First determine whether the gas to be detected is heavier or lighter than air. Install detectors at appropriate places according to the weight of the gas.

Gases heavier than air: liquefied petroleum gas, etc; 

Gases lighter than air: natural gas, artificial gas, biogas, etc.

· When detecting gases heavier than air: install 0.3-1.0 meters above the ground and within 1.5 meters of the radius of the gas source;

· When detecting gases lighter than air: install 0.3-1.0 meters below the ceiling and within 1.5 meters of the radius of the gas source (see the right figure for details);

Fix the detector on the socket on the wall and hang the detector;

· When installing at home, you should also pay attention to the fact that the installation location should not be too close to the gas stove;

· To prevent the detector from being baked by the flame of the stove; it cannot be installed in a place with a · lot of oily smoke, so as not to cause false alarms or cause the air inlet of the detector to be blocked, which will affect the sensitivity of the detector. It also cannot be installed in exhaust fans, doors and windows, and places where there is a lot of moisture in the bathroom;

· Correct wiring according to the diagram, and all wiring installations must comply with national and local effective regulations and standards. The thickness of the wire core should be appropriate, and the wires connecting the detector and other auxiliary devices should be marked with colors to avoid wrong wiring. Improper connection will cause the product not to work proper.

Product testing

(1) Install the detector in a proper position according to "Installation and Wiring".

(2)Turn on the power supply of the detector, and the circuit enters the 3-minute warm-up self-test state. After preheating, the green light is always on, and the detector enters the normal working state.

· The detector has a group of self-test buttons, which can be used to check whether the LED lights and buzzer of the detector can work normally. When the self-test button is pressed, the green, yellow and red LED lights of the detector are all on, and at the same time the buzzer emits an alarm sound of "whining".

· It is forbidden to use a lighter to directly aim at the gas convection window of the detector for testing, otherwise it will affect or even damage the sensor inside the detector.

· If you need to test, you can put the lighter gas into an empty plastic spring water bottle, and then align the bottle mouth of the mineral water bottle with the gas convection window of the detector to test. Do not use too much gas for frequent tests, as this will reduce the sensitivity of the gas sensor. The alarm concentration of gas is set according to the value specified in the GB15322.2-2019 standard. When the concentration of combustible gas in the ambient air is lower than the alarm setting value, the detector will automatically stop the alarm and return to the monitoring state.

· Lighting information

Preheating: PWP/FA/ALM Alternating flicker

Operating: The PWP green is always on

Alarm: The ALM red is always on

Indicator light failure: The FA yellow light is always on