Ex proof Pressure Transmitter/Transducer/Sensor For Ships And Boats 1.6Mpa 4 to 20mA 0.5% FS 12~24VDC Customization Accepted

Ex proof Pressure Transmitter/Transducer/Sensor For Ships And Boats 1.6Mpa 4 to 20mA 0.5% FS 12~24VDC Customization Accepted
  • Продавец15thinfantry.us
  • Список ценUS $87.22piece
  • Продажная ценаUS $87.22piece
  • ДоставкаБесплатная доставка
  • Рейтинги3,9 (123)

Oписание продукта

Product features
1, the carbon dioxide sensor with double beam infrared gas detection technique to detect the concentration of carbon dioxide gas, has high measurement accuracy, calibration cycle length, good repeatability, wide measuring range, long service life, no other background gases (CH4, H2S, SO2, N2, O2) effect etc..
2 、 the sensor adopts high performance single chip microcomputer and high integration digital circuit, the structure is simple, the performance is reliable, the debugging and the maintenance are convenient.
3, bring your own interface: RS485. The bus type network is convenient and flexible, and can realize multi-point simultaneous monitoring, networking and remote transmission. Each module has a ID number, the ID number can be changed online remotely, you can extend the communication distance to 1200 meters long, can simply and effectively solve the problem of too short distance.
4 、 based on the industrial universal MODBUS-RTU protocol, it is easy to access all kinds of industrial control systems. Support the two development, users only need to use any serial communication software according to our communication protocol to realize module data inquiry and setting.
technical parameter
Instructions
It is not recommended for outdoor installation without shelter. Water entering the equipment will directly cause damage to the equipment.
1. equipment built-in CO2 sensor belongs to the non dispersive infrared carbon dioxide sensor, need ohmic heating to achieve good condition fully, we recommend that you at least 5 minutes warm-up, even up to 1-3 hours of preheating.
2. carbon dioxide detector for greenhouse, environment and air quality control. Suitable for carbon dioxide concentration detection, carbon dioxide gas sensor testing range of concentration: 0 -5000ppm. The content of CO2 in the daily air is about 200-400ppm. When you test the module, you will put it around, and the CO2 gas you breathe will be detected by sensors, and the voltage output will fluctuate as a result of your breathing. So it\'s not that the modules are unstable, but that it\'s too sensitive.
 
Typical applications
In order to facilitate engineering networking and industrial applications, this module uses the widely used MODBUS-RTU communication protocol, and supports the two development. The user only needs to use any serial communication software according to our communication protocol to realize the inquiry and establishment of the module data.
RS485 network structure diagram of RS485 carbon dioxide sensor monitoring and control based on typical CO2, each RS485 has a carbon dioxide sensor node number, a small system can be placed 1-15 RS485 carbon dioxide sensor. Since each RS485 carbon dioxide sensor is powered by wide voltage, the whole system can be powered by a bus.
Outline size
Communication protocol
All operations or replies to the device are 16 hexadecimal data. Default communication baud rate: 9600,8, N, 1.
Basic command format:
[[] [] device address function code starting address: 2 bytes, 2 bytes of data length:][CRC16 check.
Significance is as follows:
A, device address: device address range of 1-35, of which 250 is 0xFA for the general query address, when you do not know the address of the device, you can use this universal query address for inquiries.
B, function code: different application requirements, function code is different, for example, 3 for query input register data.
C, start address: query or operation register start address.
D, data length: read length.
E, CRC checksum: CRC16 checksum, high in the front, low in the back.
1) read the data (function code is 0x03)
[device address][03][start address: 2 bytes, 2 bytes of data length:][CRC16 check.
Note: data length is 2 bytes, SM2170 CO2 content value, query data length is fixed to 0x00 01
Device response:
[[] [] device address command number returns the number of bytes of data 1][CRC16 checksum].
The response data is as follows:
A, the number of bytes returned: the number of bytes representing data, that is, the value of N in data 1, 2,..., n.
B, data 1... N: the measurements of each sensor, the CO2 content values, occupy 2 bytes. Integer data.
For example, query the CO2 content values on the device 1, sensor data:
Send: 010300000001 [CRC16 check]
Response: 01030203 75[CRC16 check]
The above reply data: 01 table address 1, table 02 data length is 2 bytes, the measured data length is 2 bytes, such as the first data is 0375 (sixteen m), folded into 10 binary method:
V=256*0x03+0x75=885.
That is: 885, that is, the actual value is 885ppm.
In configuration software, register comparison table:
Serial name, register address, data type
1 CO2 content value register 40001 integer
2 range scale factor 40005 integer
3 offset register 40006 int
2) change the device address (function number: 0x06, auxiliary command number: 0x0B)
Send command format:
[[] command device address: 0x06][: 0x0B] [00 00] auxiliary command number [target address: 1 bytes] [CRC16]
Explain:
A, destination address: the value range is 1-35, and the destination address is not the same as the current address.
B and 0000 are sixteen hexadecimal numbers. They are fixed values and cannot be changed.
For example, when the device address 1 is changed to 2, the command is:
0106 B 000002 A 2F
Device response: 022501029006
Device response format: [[] query device address device address command number [] [] data length: 1 bytes of random bytes 1 bytes: [CRC16]
For example: 0225011811 CD indicates that the current device address is 02 after the main.
3) query the device address (function number: 0x25, auxiliary command number: 0x02)
If you do not know the current device address and only one device on the bus, you can query the current device address through this command.
Send command format:
[device address: 0xFA][command number: 0x25][, auxiliary command number: 0x02], [00 00, 01], [CRC16]
Explain:
A, device address 0xFA addresses the address for general purpose devices.
B and 000001 are sixteen hexadecimal numbers. They are fixed values and cannot be changed.
For example, query the current device address and command FA 250200000199 FE
Device response: 0225011811 CD
Device response format: [[], [] command device address data length: 1 bytes of random bytes 1 bytes: [] [CRC16]
For example: 0225011811 CD indicates the device address is 02.
4) range scale factor setting (function number: 0x06, auxiliary command number: 0x0A)
When the data is in error with the standard reference, we can reduce the display error by adjusting the range scale data. This parameter is used to correct the device before leaving the factory and the user does not have a correction device. It is recommended not to change this value.
Send command format:
[[] command device address: 0x06][auxiliary command number: 0x0A [00] range zoom coefficient [CRC16]
Explain:
A, device address: current device address.
B, auxiliary command: fixed value, cannot be changed.
C, range scale factor: value range 1000-50000, corresponding to the actual coefficient of 0.1000-5.0000. The current display value can be reduced by 10 times or enlarged by 5 times. The corresponding sixteen scale range is 0x03E8-0xC350
If the current value is too small, the proposed coefficient is greater than 1, i.e., the parameter is greater than 10000. If the current value is too large, the coefficient is suggested to be 1, i.e., the parameter is less than 10000.
For example, set the current sensor range amplification 1.0010 times, that parameter value should be 10010, corresponding to sixteen decimal to 0x 2700, then set the command for 0106 0A 04270051 E8
Device response: 01042700 DA 22
Device response format: [[], [] command device address parameters [CRC16]]
The sensor is supplied with software tools, and users can understand the data processing methods according to the communication protocol and random software.