Real-time monitoring

• Mining intrinsically safe water shortage sensor is an intrinsically safe equipment for mining, which can continuously monitor the water supply of the gas pump and output corresponding switching signal, in addition to being used with KJ70N coal mine monitoring system, it is also compatible with other coal mine monitoring systems in China.

• Main technical parameters

  (1) Explosion-proof type: intrinsically safe, marked as "ExibⅠMb".

  (2) Rated supply voltage: DC 18V.

  (3) Operating current: ≤80mA.

• The dust concentration sensor is a high-tech sensor developed by utilizing the laser scattering principle in order to meet the requirements of existing coal mines for monitoring underground dust concentration. The sensor is capable of continuously detecting the underground dust concentration for a long period of time in real time and simultaneously outputting signals that are compatible with the mine monitoring system.

• Main technical parameters

(1) Operating voltage: DC 12V～29.5V;

(2) Maximum starting current and maximum operating current: ≤150mA;

(3) Measuring range: 0mg/m³ to 1000mg/m³;

(4) Basic error of dust concentration measurement: ±15% of the true value;

(5) Zero stability of dust concentration: ≤5mg/m3;

(6) Sampling nominal flow rate: 1.1L/min;

(7) Sampling flow stability: 8h sampling flow stability is not greater than the nominal value of ± 3%;

(8) Working noise: ≤60dB(A);

(9) Output signal: Number of interfaces: 1;

                           Transmission method: master-slave, bipolar, half-duplex, 485 signals;

                           Transmission rate: 2400 bps;

                           Operating voltage peak to peak: (2 to 12) V;

(10) Function: the sensor has a remote control tuning function, remote control distance 0 ~ 6 m, remote control angle: 0 ~ 45 °;

                      The sensor has a three-digit digital display with a dust concentration display resolution of 1 mg/m3.

(11) Tuning cycle: 30 days

(12) Characteristics: Rapid and accurate measurement of underground dust concentration using the laser scattering principle.

                      A unique air intake system is used to ensure accurate measurements over the full range.

                      Adopt infrared remote control to adjust each parameter of the sensor, and realize the adjustment without opening the cover to make the adjustment more simple.

• Mining oxygen sensor (hereinafter referred to as sensor) is a high-precision instrument for continuously detecting oxygen concentration in the mine. The sensor can measure and display the oxygen concentration in the mine in real time, and generate sound and light alarm signals according to the size of the concentration value, and output an analog signal corresponding to the oxygen concentration.

• The sensor can make early prediction and forecast of fire and explosion accidents that may be triggered by various factors such as spontaneous combustion of coal seams, electromechanical equipment, transportation tape accidents, etc. in mines with gas and coal dust explosion. In addition to the KJ70N coal mine monitoring system, the sensor is also compatible with other coal mine monitoring systems; it can also be used independently in a variety of mine fire monitoring systems.

• Main technical parameters:  

(1) Explosion-proof marking: "Exib I Mb".

(2) Operating voltage: (9 ～ 24)V.

(3) Operating current: ≤ 100 mA.

(4) Sensor range: (0 to 25)%O2.

(5) Output signal: RS485, frequency analog signal frequency range: (200 ~ 1000) H, output current 1mA ~ 5mA or 4mA ~ 20mA

• Mining sulfur dioxide sensor (hereinafter referred to as the sensor) is a high-precision instrument for continuous detection of sulfur dioxide concentration in the mine. The sensor can measure and display the concentration of sulfur dioxide in the mine in real time, and generate sound and light alarm signals according to the size of the concentration value, and output analog signals corresponding to the concentration of sulfur dioxide. The installation of the sensor plays a great role in monitoring the working environment of underground workers and the normal development of underground work.

• Main technical indicators

  (1) Explosion-proof type: Intrinsically safe for mining use, marked as "Exib I Mb";

  (2) Rated operating voltage: DC9~24V;

  (3) Operating current: ≤100 mA;

  (4) Sensor range: (0 to 20) × 10-6 SO2;

  (5) Output signal: RS485;

  (6) Basic Error: Measurement Error 0～20 (1×10-6): ±5%

  (7) Response time: not more than 45s.

• Coal mine pressure sensor, belonging to mine intrinsically safe equipment, can continuously monitor the pressure of gas and liquid in the pipeline, and display the gauge pressure value of the measured point in real time. In addition to the KJ70N coal mine monitoring system with the use of other domestic coal mine monitoring system is also compatible.

• Main technical indicators

  (1) Explosion-proof type: Intrinsically safe for mining, marked as "Exib I Mb".

  (2) Rated supply voltage: 18V.DC.

  (3) Operating current: ≤80mA.

  (4) Measuring range: (0 ~ 10) MPa; Resolution: 0.01 MPa

  (5) Basic error: ±0.2 MPa ;

  (6) Output signal: RS485, frequency output range: (200 ~ 1000) Hz; current output range 1mA ~ 5mA or 4mA ~ 20m

• Mining intrinsically safe monitoring sub-station is a new generation of monitoring sub-station developed for the underground fusion of coal mine safety monitoring system. Equipped with various communication interfaces such as Ethernet, ZigBee, RS485 interface, CAN interface, etc., the sub-station can collect gas and other sensor data, personnel positioning data, power supply data, and comprehensively analyze the collected data according to the fusion linkage logic sent from the host computer, and then carry out local or offsite power outage, controlling personnel positioning sub-station, emergency broadcasting, and information guiding display according to the results of the linkage.

• Main technical indicators

  (1) Explosion-proof type: "Ex ia ib I Mb";

  (2) Rated voltage: 1. Rated operating voltage: DC 18 V;

                              2. Working current: ≤ 450mA.

  (3) Data transmission: 1. Monitoring substation (RS485) port 5;

                              2. 2 monitoring substation (CAN) ports;

                              3. 4 Ethernet optical transmission ports and 3 Ethernet electrical transmission ports in the monitoring substation;

   4) Maximum transmission distance : Monitoring substation to sensors, disconnectors, audible and visual alarms: 2 km;

                                 Monitoring substation to 485 communication sensor: 6 km;

                                 Monitoring substation to CAN communication sensor: 6 km;

                                 Monitoring substation to wireless communication sensor: 50 m;

                                 Monitoring substation to data transmission interface: 10 km;

                                 Distance to Ethernet power port of monitoring substation: 100 m.

  (4) Maximum monitoring capacity: 32 RS485 type digital sensors;

                                   16-way CAN-type digital sensor;

                                    3 smart power supplies;

                                    6 Area Read Substations or Precision Read Substations;

                                    6-way open outlet control;

                                   1 channel of ZigBee data transmission;

                                    8 RS485 disconnectors;

                                    8 IP broadcasts;

                                    4 information guidance displays

  (5) Power fluctuation adaptability: DC power supply voltage fluctuations in the range of (9 ~ 24) V, the substation should be able to work normally.

  (6) Protection grade: IP65

• Coal mine methane sensor is a kind of intelligent detecting instrument used to detect the methane content in the air of underground coal mine. Zeroing, sensitivity, non-linear compensation and other functions can be realized by remote control, which has the advantages of high precision, stable and reliable, easy to use. Not only can it be used with our KJ70X monitoring system, but also with other manufacturers' coal mine monitoring systems.

• Main technical indicators

  (1) Explosion-proof type: intrinsically safe and explosion-proof type, sign "Exdib I Mb";

  (2) Measurement range: (0~4)%CH4, ventilation flow rate: 200mL/min;

  (3) Frequency range: 200 Hz to 1000 Hz (pulse width greater than 0.3 ms);

  (4) RS485 signal: 2400bps;

  (5) Response time: should be no more than 20s;

  (6) Supply voltage: DC 9V～24V;

  (7) Operating current: less than 80mA at rated DC 18V;

  (8) Remote control distance: not less than 5m;

  (9) Basic error: Measurement error 0.00 ~ 1.00%CH4: ± 0.10

                              1.00 to 3.00CH4: ±10% of true value

                              3.00 to 4.00CH4: ±0.30

  (10) Power failure output: 0/5mA current pulse;

  (11) Alarm point: set arbitrarily within the measuring range;

  (12) Power-off point: set arbitrarily within the measuring range;

  (13) Protection class: IP65.

• Mining wireless carbon monoxide sensor (hereinafter referred to as the sensor) is used to detect the carbon monoxide content in the air of underground coal mine. It is a kind of intelligent detecting instrument, with temperature compensation and other functions, and all functions can be realized by remote control, with high precision, stable and reliable, easy to use, etc., and with KJ70X and other coal mine monitoring and control system supporting the use.

• Main technical indicators

  (1) Explosion-proof type: Intrinsically safe, marking "Exib I Mb".

  (2) Measuring range: (0 to 1000) × 10-6CO .

  (3) Power supply: Rated operating voltage: DC 7.4V (battery-powered);

                      Working current: ≤200mA.

                      Battery pack parameters: the battery pack consists of a single nominal voltage DC 3.7V, a single nominal capacity of 4000mAh, model PL145568 lithium manganate lithium-ion storage batteries, 2 series and 2 parallel battery protection boards (to realize the over-charging, over-discharging, over-current protection and short-circuit protection). Maximum open-circuit voltage of the battery pack: ≤8.4V; Maximum short-circuit current ≤1.2A.

  (4) Output signal: Transmission method: Wireless transmission;

                               Communication protocol: Zigbee

                               Modulation mode: O-QPSK;

                               Operating frequency: 2394-2507MHz;

                               Transmit power: (0 to 19.5) dBm (wireless transmit threshold power in front of antenna: 1mW to 3.2mW);

                               Receiving sensitivity: -90dBm;

                               Maximum transmission distance: 100m (open and unobstructed);

                               Antenna: Qty. 1, Model: S-8DB-2400-802.11, Nominal Gain 8dBi

  (5) Stability of display value: In the measuring range of this sensor, when the concentration of carbon monoxide is constant, the change of the sensor display value or output signal (converted to the concentration of carbon monoxide) will not be more than 4×10-6CO.

  (6) Response time: not more than 35 s.

  (7) Sound and light alarm function: the alarm point should be able to be set arbitrarily within the measurement range, and the difference between the alarm point and the set value should not exceed ±0.5×10-6 CO;

                                      The loudness of the acoustic signal should be not less than 80 dB(A) at a distance of 1 m from it, and the optical signal should be clearly visible at a distance of 20 m.

• Wireless Oxygen Sensor (hereinafter referred to as the sensor) is a high-precision instrument for continuous detection of oxygen concentration in the mine. The sensor can measure and display the oxygen concentration in the mine in real time, and generate sound and light alarm signals according to the size of the concentration value, and output analog signals corresponding to the oxygen concentration.

• The sensor can make early prediction and forecast of fire and explosion accidents that may be triggered by various factors such as spontaneous combustion of coal seams, electromechanical equipment, transportation tape accidents, etc. in mines with gas and coal dust explosion. In addition to the KJ70X coal mine monitoring system, the sensor is also compatible with other coal mine monitoring systems; it can also be used independently in a variety of mine fire monitoring systems.

• Main technical indicators

  (1) Explosion-proof type: Intrinsically safe, sign "Exib I Mb".

  (2) Measuring range: (0 to 25)%O2.

  (3) Power supply: Rated operating voltage: DC 7.4V (battery-powered);

                      Working current: ≤200mA.

                      Battery pack parameters: the battery pack consists of a single nominal voltage DC 3.7V, a single nominal capacity of 4000mAh, model PL145568 lithium manganate lithium-ion storage batteries, 2 series and 2 parallel battery protection boards (to realize the over-charging, over-discharging, over-current protection and short-circuit protection). Maximum open-circuit voltage of the battery pack: ≤8.4V; Maximum short-circuit current ≤1.6A.

  (4) Output signal: Transmission method: Wireless transmission;

                              Communication protocol: Zigbee

                              Modulation mode: O-QPSK;

                              Operating frequency: 2394-2507MHz;

                              Transmit power: ≤20dBm (wireless transmit threshold power in front of the antenna: 1mW to 3.2mW);

                              Receiving sensitivity: -90dBm;

                              Maximum transmission distance: 100m (open and unobstructed);

                              Antenna: Qty. 1, Model: S-8DB-2400-802.11, Nominal Gain 8dBi

  (5) Basic error: Measuring range 0～25%O2: ±3% (full scale)

  (6) Stability of display value: In the measuring range of this sensor, when the oxygen concentration is constant, the sensor display value or output signal (converted to oxygen concentration value)

                                   The amount of variation does not exceed ±0.41 TP3T O2.

  (7) Response time: not more than 60 s.

  (8) Display resolution: 0.1%O2.

  (9) Remote control distance: not less than 5 m.

  (10) Ventilation flow rate: 200 mL/min.

• Mining intrinsically safe radar level sensor (hereinafter referred to as the sensor) is used in coal and other industries with explosive hazardous environments, non-contact automatic and continuous detection of granule, block, liquid and other material silo material level, and provide real-time measurement data for the management center. The sensor adopts the FMCW ranging method to ensure that the whole production process can be carried out safely and efficiently.

• Main technical indicators

  (1) Explosion-proof form: Intrinsically safe;

  (2) Measuring range: 1m～70m;

  (3) Measurement accuracy: 0.1m;

  (4) Measurement error: ±5% (F.S.);

  (5) Rated operating voltage: DC18V;

  (6) Operating current: ≤300mA;

  (7) Protection grade: IP65;

  (8) RS485 signal: 2400bps;

  (9) Display function: the sensor has a 1.8-inch LCD display function.