KSS521 Infrared SF6 Gas Sensor Module

 

 

 

 

 

 

 

 

1. Overview

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

 

 

 

 

3.Structural Dimension Drawing

 

KSS521 diffusion (pumping compatible) block diagram

Pump suction type: length * width * height: 61mm * 40mm * 32mm

Diffusion type: length * width * height: 61mm * 40mm * 18mm

 

 

4.Installation Instructions

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.

5.Matters that should be paid attention to in maintenance

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.

6.Ordering Instructions

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

 

7.Order Information

 

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

 

 

 

8.Contact Details

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