GUD300 Mining intrinsically safe roof displacement sensorDetailed product description：

GUD300 intrinsically safe roof displacement sensor for mining (hereinafter referred to as the sensor) is an intrinsically safe equipment for mining and can be used in environments with explosive gases underground in coal mines; Mainly used for detecting roof displacement in underground tunnels or roof working faces. The sensor adopts high-precision displacement sensors and a constant force pulling design to accurately monitor the movement of the small top plate.

Environmental conditions for use
The sensor should be able to function properly under the following environmental conditions:
a) Environmental temperature: (0-40) ℃; At this time, according to Article 5.1.1 of GB3836.1-2010, it is necessary to add the symbol "X" or indicate the ambient temperature on the nameplate;
b) Humidity: ≤ 98%;
c) Atmospheric pressure: (80-110) KPa;
d) In situations where there is no significant vibration or impact;
e) In coal mines where there are explosive mixtures but no corrosive gases that can damage insulation; f) A place without dripping water.

Main functions of GUD300 intrinsically safe roof displacement sensor for mining
a) Featuring a 4-digit digital display with two top panel values and a resolution of 1 mm;
b) Alarm value: adjustable within the range of 0-300 mm;
c) Equipped with infrared remote control receiving function at a distance of no more than 5 meters;
d) Transmission distance: The cross-sectional area of the transmission cable is greater than 1 At 5 mm2, the transmission distance of the sensor should not be less than 2 Km.

Main technical specifications of GUD300 intrinsically safe roof displacement sensor for mining
Supply voltage and current
a) Rated working voltage: 18 VDC;
b) Rated working current: ≤ 200 mA.

Output frequency analog signal (cannot be used simultaneously with digital RS485 signal output)
a) Frequency range of 200 Hz to 1000 Hz;
b) The pulse width is greater than 0.3 ms, the voltage in the high-level state is not less than 3 V, and the voltage in the low-level output state is less than 0.5 V.
Output digital signal
a) Number of interfaces: 1 channel;
b) Transmission mode: RS485, bipolar, half duplex;
c) Transmission rate: 2400bps;
d) Signal peak to peak value: (2.0-10.0) V
e) Maximum transmission distance: 2km (using MHY32 communication cable, with a cross-sectional diameter of not less than 1.5 mm2);
Measurement range and error a) Measurement range: 2 channels, 0-300mm; b) Error range: ± 2.5% (F.S.).