Gas Sensor Module HCL VOC PID Analyzer CEMS Gas Integration H2SO4 Infrared Principle CH4 EX CO H2S O2 SO2 NO2 NO PH3 HCN H2
Category: Products Gas sensor module Aluminum alloy gas module
Key words: Products
Model: SK/MIC-500
Measurement object: CO2/Ex/CH4/CO/H2S/O2/N2/NH3/CL2/H2/He/Ar/CH2O/O3/NO/NO2/SO2/C2H4O/PH3/COCL2/HBR/HCL/HCN/CLO2/SIH4/CH3BR/SO2F2/F2/HF/C2H2/CS2/SF6/C2H4/C2H6O/H2O2/VOC/PM/RH
Product Description
Features of the gas sensor module
★The whole machine is small in size and light in weight
★ Professional selection of imported sensors, which can be equipped with electrochemical, catalytic combustion, infrared principle, thermal conductivity principle,PID and other sensors.
★ High precision, high resolution, and rapid response.
★ Data recovery function eliminates the worries caused by accidental operations.
★ Factory precise calibration, no need for further calibration. .
The analog voltage or current and serial port are output simultaneously, which is convenient for customers to debug and use.
★ The most precise circuit design and manufacturing process, complex production but simple to use.
★ It can be connected to a computer for communication and self-calibration.
It comes with a built-in zero-point fine-tuning function, making it convenient to select reference data.
★ Low-power products with portable power supply can be widely used in analyzer instruments, atmospheric and environmental unmanned aerial vehicle monitoring.
Gas sensor module size diagram and pin definitions：
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Schematic diagram of the 4-20mA connection for the gas sensor module:
Schematic diagram of RS485 connection for gas sensor module:
Application sites of gas sensor modules：
Pharmaceutical research, school research, pharmaceutical production workshops, tobacco companies, environmental monitoring, building construction, fire alarm, sewage treatment, petroleum and petrochemical, chemical plants, smelters, steel mills, coal mines, thermal power plants, boiler rooms Gas filling stations, garbage treatment plants, tunnel construction, oil pipelines, aerospace, industrial gas process control, indoor air quality testing, underground gas pipeline maintenance, safety protection in hazardous areas, military equipment testing, etc.
ModbusRTU Instruction set
This agreement lists the main registers of toxic gas detectors, toxic gas detector modules, dust detectors, temperature and humidity detectors, etc. Some specific registers are only valid in their respective devices. For example, the real-time values of temperature and humidity are only valid in temperature and humidity detectors.
- The RS485 interface adopts the standard modbusRTU protocol, with a baud rate of 9600, no parity bit, 8 data bits, and 1 stop bit.
- Supported function code: 03: Read single or multiple register values; 06: Write a single register value.
- The content of the register is read using the 03 function code
03The format for using function codes
Sent by the host：
Note: Data address range: 0 to 47 (i.e., 0x0000 to 0x002F). The valid data addresses for users are as follows. The remaining addresses will be reserved.
Slave machine reply：
Note: When the host reads data, the maximum address must not exceed 0x002F, that is, the sum of the starting address and the number of data points must not exceed 0x002F; otherwise, an error will be reported and the reading will fail.
Note: The six parameters of real-time detection value, low alarm value, high alarm value, full scale of the equipment, alarm hysteresis, and concentration at the calibration point need to be calculated in combination with the number of decimal places. For example, if the real-time detection value is 1256 in decimal and the decimal place of this equipment is 2, then the actual real-time detection value is 12.56. The same applies to the other five parameters.
- Read the real-time detection value (FE is the broadcast address, which must be changed to a specific slave number when in use, the same below)
Sent by the host：01 03 00 00 00 01 84 0A
Slave machine reply：01 03 02 00 02 39 85 （The real-time concentration of the gas is 2ppm）
- Read the low alarm value
Sent by the host：01 03 00 01 00 01 D5 CA
Slave machine reply：01 03 02 00 40 B9 B4 （The underreported value is 64）
- Read the high reported value
Sent by the host：01 03 00 02 00 01 25 CA
Slave machine reply：01 03 02 00 64 B9 AF （The high reported value is 100）
- Read the device address (use the universal code FE when the device address is unknown. The universal code is applicable to all instructions of 03 and 06)
Sent by the host：01 03 00 0C 00 01 44 09
Slave machine reply：01 03 02 00 01 79 84 （address #1）
- Read the full scale of the device
Sent by the host：01 03 00 0B 00 01 F5 C8
Slave machine reply：01 03 02 03 E8 B8 FA （The full scale is 1000）
- Read the type of device
Sent by the host：01 03 00 0E 00 01 E5 C9
Slave machine reply：01 03 02 00 09 78 42 （Equipment inspection objectCO）
(The following is represented in Hex codes, including but not limited to the types of gases listed in the table)
List of names and numbers of some gases：
- Read the decimal point
Sent by the host：01 03 00 0D 00 01 15 C9
Slave machine reply：01 03 02 00 02 39 85 （2位小数点）
- Unit reading
Sent by the host：01 03 00 17 00 01 34 0E
Slave machine reply：01 03 02 00 F6 38 02 （ppm）
0000：empty； 00F6：ppm； 005F：ppb； 200E：%LEL； 380E：%VOL； 3900：ug/m3； 4000：mg/m3
- Read and retrieve the difference
Sent by the host：01 03 00 24 00 01 C4 01
Slave machine reply：01 03 02 00 14 B8 4B（The hysteresis value is：0x0014=20）
To modify the register content, use the 06 function code (when the specific address number is unknown, the universal code FE can be used).
Sent by the host
Slave machine reply
- Modify the low report register
Sent by the host：01 06 00 01 00 30 D8 1E
Slave machine reply：01 06 00 01 00 30 D8 1E（The low reporting for repair has been changed0x30，That is 48）
- Modify the high report register
Sent by the host：01 06 00 02 00 64 29 E1
Slave machine reply：01 06 00 02 00 64 29 E1（The high report has been revised 0x64，That is 100）
- Modify the address register
Sent by the host：01 06 00 0C 00 02 C8 08
Slave machine reply：01 06 00 0C 00 02 C8 08（The address has been modified to2）
Note: After executing the instruction to modify the address register, when the next instruction is executed, the address byte must be replaced with a new address; otherwise, normal communication cannot occur and the CRC16 check code will need to be recalculated.
- Zero adjustment of the equipment
Sent by the host：01 06 00 19 00 00 58 0D
Slave machine reply：01 06 00 19 00 00 58 0D(Zero adjustment in a clean and atmospheric environment
- Equipment calibration
Sent by the host：01 06 00 19 08 29 9E 13（Calibrated as 2089，It has nothing to do with decimal points）
Slave machine reply：01 06 00 19 08 29 9E 13
- Modify the hysteresis
Sent by the host：01 06 00 24 00 32 48 14
Slave machine reply：01 06 00 24 00 32 48 14（Modify the lag to 0x0032,That is 50）
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