KCS571
Infrared CO2 Gas Sensor Module
SW711 is a gas sensor based on the principle of NDIR infrared
absorption, suitable for testing the gas concentration of various
heteronuclear molecules in industrial applications.
SW711 adopts a patented optical cavity, imported light source and
dual-channel detector to achieve dual optical path reference
compensation in space. SW711 has good selectivity, no oxygen
dependence and long life.
The SW711 has UART, 4 to 20mA outputs, 485 outputs, etc., and
provides customers with a manually calibrated MCDL pin. It is
convenient for customers to use outdoor free-flowing clean air to
calibrate the sensor module relative to zero.
SW711 adopts diffusion ventilation method, and the response time is
less than 30 seconds.
The SW711 is available in a variety of packages that can be
customized to meet customer needs. There are three common packages: package one, package two (six
pins 4-20mA), package three (seven pins 485 interface), of which
package two and package three are the same size.
Package one
Package 2 (6-pin 4-20mA) Package 3 (7-pin 4 85 connectors).
| parameter | symbol | minimum | Typical values | maximum | unit |
| Storage Temperature | Tstg | -20 | - | 80 | °C |
| Operating Temperature | TA | -20 | | 60 | °C |
| Operating Humidity | HA | 0 | | 90 | % RH |
| Work Pressure | PA | 0.8 | | 1.2 | atm |
| Supply Voltage | Vs | 5 | 5 | 5.5 | V |
| Maximum Operating Current | Imax | | 120 | 150 | mA |
| Detection Range | 200 | 50000 | 100% vol can be customized | | ppm |
| Measurement accuracy | - | ± 50ppm or ±3% true value | ± 300ppm± 3% true | | ppm |
| T90 | diffusion | - | 30 | 60 | second |
| repeatability | zero | | | <±50 | | ppm |
| 50% FS | - | | <±2% of the measured value | - | |
| life span | | 3 | 5 | 10 | year |
The sensor mounting thread dimensions refer to the block diagram.
The sensor should be calibrated regularly, it is recommended that
it be no more than 3 months, and calibration is not required on the long-term operation
side if automatic calibration is turned on
Do not use the sensor for a long time in an environment with a high
density of dust
Please use the sensor within the range of the sensor's power supply
In order to be able to purchase the specific specifications
required, please provide the following information
1) Sensor name, 2) Sensor range 3) Sensor measurement accuracy and
output mode, etc
For example, SW711, 50000ppm, 4-20mA output
| Order Information Selection Form |
| products | power supply | Cable length | Signal output | | |
| KCS571 | Infrared CO2 Gas Sensor Module | |
| 12VDC | Power supply is 12VDC (default) | |
| 220V/110VAC | The power supply is 220/110VAC | |
| Cable length | | |
| XXm | The default is 5 meters, the maximum is 500 meters | |
| 4-20mA | 4-20mA output without RS485 output | |
| RS485 | RS485 output, without 4-20mA output by default | |
| ARS485 | 4-20mA output with RS485 output | |
| Modbus-RTU | The protocol for the RS485 output is Analog-to-Digital Bus-RTU
(default) | |
| Modbus-ASC | The protocol for RS485 output is Modbus-RTU | |
| KCS571 | DC12V | 5 meters | RS485 | | |
| | | | | | | |
1 In environments with EMC issues, shielded cables must be used.
2 When the module is cold started, the warm-up time should not be
less than 2 minutes.
3 The sensor should be calibrated regularly, not more than 3 months
is recommended.
4 Do not use the sensor for a long time in a dusty environment.
5 Please pay attention to the wiring of the positive and negative
terminals of the power supply and the signal output terminals. Do
not connect backwards.
6 High concentrations of chemical contamination can lead to the
destruction of the sensor polymer layer, therefore, the product
should be stored and used away from the source of chemical
contamination.
7 Please refer to the relevant national product installation
standards for the installation process.
Contact Details
URL: www.kacise.com
Tel: +86-17719566736
Email: sales@kacise.com
Address: Tangyan South Road, High-tech Zone, Xi'an, Shaanxi
Province
Appendix
| Shorthand | Full name |
| VOL | 1% VOL refers to 1% of the volume of a particular gas in air. |
| PPM | 1PPM means that the volume of a specific gas in the air accounts
for one millionth. |
| O2 | Oxygen molecules |
| LCD | LCD display |
| RS485 | Asynchronous serial port 485 |
| DC | direct current |
| AC | Communication |
| PVC | polyvinyl chloride |
