KSS521 Infrared SF6 Gas Sensor Module
SF6 gas is widely used as an insulating medium and arc
extinguishing gas in power equipment, especially in high-voltage
circuit breakers, transformers, transformers, capacitors,
arresters, fuses, etc. If leakage occurs, the pressure of the
equipment is reduced and the insulation capacity is reduced;
Pollute and destroy the atmospheric environment, increase the
greenhouse effect; Accumulation in low-level spaces, resulting in
accidents such as lack of oxygen in the brains of staff and even
rapid asphyxiation; Under the influence of partial discharge, high
temperature and other factors, SF6 gas will produce highly toxic
decomposition substances such as SF4, SF2, SOF2, etc.
KSS521 is a gas sensor module using NDIR infrared absorption
detection principle, which determines the concentration according
to the absorption of SF6 gas at 10.5um. KSS521 adopts MEMS light
source, special structure optical cavity and dual-channel detector
to realize space dual optical path reference compensation, and
microprocessor for signal acquisition, processing and output.
KSS521 is small in size, low power consumption, and has UART, 485
(Modbus RTU, Modbus ASCII, Modbus custom optional) and single-bus
digital interface, providing digital calibration zero and
sensitivity functions, and providing manual calibration zero
function.
KSS521 can be widely used in SF6 gas leak detection and other
occasions SF6 gas concentration analysis in the power industry.
2. Technical parameters
| 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 | 11 | 12 | 30 | V |
| Maximum operating current | Iavg | 100 | 120 | 150 | mA |
| Detection Range (customizable). | Ra | | 1500 | | ppm |
| Measurement Accuracy | Acurracy | | ± 10ppm or ±5% truth value | | %vol |
| T90 pipeline type | Pump suction | | | 5 | | second |
| diffusion | | 30 | | second |
| Repeatability | zero | | | Less than ±50 | | ppm |
| Range | | | Less than ±5%. | | |
| Life Span | | | 10 | | year |
KSS521 diffusion (pumping compatible) block diagram
Pump suction type: length * width * height: 61mm * 40mm * 32mm
Diffusion type: length * width * height: 61mm * 40mm * 18mm
The sensor is mounted with a positioning hole spacing of 54 mand an
aperture of 3.2 mm.
The wiring socket spacing is 2.54 m m.
The sensor should be calibrated regularly, not more than 3 months
is recommended.
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, KSS521, SF6, 0-5000 ppm
| Order information sheet |
| KSS521 | KSS521 infrared SF6 gas sensor module |
| xxxx | The sensor measures the range of CO2 concentration in ppm, with a
minimum value of 2000 and a maximum value of 50000 ppm. |
| 2000 | Range 200ppm (default). |
| 10000 | Range 10000ppm |
| 50000 | Range 50000ppm |
| encode | The reaction speed is divided into two types: fast and slow |
| S | Slow (default). |
| Q | fast |
| encode | Baud rate selection, support commonly used baud rate 2400 9600
19200 38400bps, 8 bits of data, 1 bit of stop bit, no check bit:
Confirm special needs before ordering. |
| Custom | Confirm the baud rate before ordering |
| 2400 | 2400bps baud rate |
| 9600 | 9600bps baud rate |
| 19200 | 19200bps baud rate |
| 38400 | 38400bps baud rate (default) |
| encode | Serial port protocol |
| Modbus-RTU | Standard Modbus-RTU protocol (default). |
| Modbus-ASCII | Standard Modbus-ASCII protocol |
| Modbus-Self | Modbus private protocol |
| KSS521 | -2000 | -S | -38400 | -Modbus-RTU | |
URL: www.kacise.com
Tel: +86-29-17719566736
Email: sales@kacise.com
Address: Tangyan South Road, Xi'an City, Shaanxi Province, China
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 |
