GFK30 Mining voice sound light damper opening and closing status sensorDetailed product description：

The GFK30 mining voice sound light damper opening and closing status sensor (hereinafter referred to as the damper sensor) is a magnetic driven position switch sensor, which is an intrinsic safety product for mining. Installed on various levels of air doors in underground tunnels, it is used to monitor the opening and closing status of air doors, provide air door status information for ventilation management, and sound and light voice alarms when air doors are opened to remind operators to close them properly. The air door sensor can be used in conjunction with the mine monitoring and control system, and its passive switch contact signal or current signal can be directly provided to the mine monitoring system for collection and processing.
2. The air door sensor should be able to operate normally under the following environmental conditions:
a) Environmental temperature: 0 ℃ to+40 ℃;
b) Average relative humidity: not exceeding 95% (+25 ℃);
c) Atmospheric pressure: 80kPa~110kPa;
d) There are explosive mixtures such as methane and coal dust underground in coal mines, but there are no corrosive gases that can damage insulation.
The worst storage and transportation conditions that the air door sensor can withstand are:
a) High temperature:+60 ℃;
b) Low temperature: -40 ℃;
c) Average relative humidity: not exceeding 95% (+25 ℃);
d) Vibration: 50m/s

Technical performance of GFK30 mining voice sound light damper opening and closing status sensor
3.1 Explosion proof type:
Mining intrinsic safety type, marked as "ExibIMb".
3.2 Electrical Performance
3.2.1 Power Supply
Rated working voltage DC18V, current ≤ 200mA, voltage fluctuation range DC 12-25V.
Please refer to the 'List of Main Components and Important Raw Materials of the Applied Product' for the associated equipment.
3.2.2 Output Function
3.2.2.1 Voice, Sound, and Light Alarm Function
The opening and closing status of the air door sensor adopts a voice sound and light alarm method. When the air door is opened, the voice alarm emits an alarm sound and a red alarm light
Shining; When the air door is closed, the voice alarm stops and the red light alarm light goes out.
3.2.2.2 Signal output function
3.2.2.2.1 Contact signal output: (Internal toggle switch selected to JD) When the air door is in the "open" state, the contact is conductive; The air door is in the "closed" state, and the contact is disconnected
Open; Contact capacity: 30V/0.1A (resistive).
3.2.2.2.2 Current signal output: (internal toggle switch selected to DL), air door in "open" state, current output: 0mA (load impedance ≤ 1k Ω); The air door is in the "closed" state, and the current output is 5 ± 0.5mA (load impedance ≤ 1k Ω).
3.3 The action distance shall not be less than 30mm, and the reset distance shall not exceed 80mm (using matching magnets).
3.4 Protection level: IP54.
3.5 Intrinsic safety parameters: Ui: 25V Ii: 200mA.