KNC (Korea New Ceramics) gas sensors

Technical selection of KNC (Korea New Ceramics) sensors: catalytic KGS 701, 702, 703, 501, 502, 801, 901, 902, hydrogen KGS 704, 504, 903 and the KGS 102 semiconductor sensor.

Catalytic sensors KGS 701, 702, 703

KNC KGS 701, 702 and 703 explosion-proof catalytic bead sensors measure combustible gases over 0–100% LEL in portable gas detectors. The models differ in supply voltage: 3.0, 3.3 and 4.25 V. The housing is stainless steel 316 with Ex db IIC flameproof protection.

Range 0–100% LEL
KGS 701: 3.0 V, 76 ± 6 mA
KGS 703: 40 ± 6 mV per % methane
T90 under 10 s for methane

Combustible gas sensors KGS 501 and KGS 502

KNC KGS 501 and KGS 502 are catalytic combustible gas sensors in a flameproof housing for portable instruments. KGS 501 runs at 3.0 V with 27 ± 5 mV per % methane, KGS 502 at 3.3 V with 28 ± 6 mV. Both are listed to UL 913, Class 1, Division 1, Groups A–D.

KGS 501 supply 3.0 V
KGS 501: 27 ± 5 mV per % methane
KGS 502: 28 ± 6 mV per % methane
UL 913, Groups A–D

Compact catalytic sensor KGS 801

The KNC KGS 801 catalytic sensor has a smaller size for compact gas detectors. At 3.0 V and 76 ± 6 mA it delivers 24 ± 5 mV per % methane. Relative sensitivity is 70 for propane, 65 for isobutane and 60 for pentane against methane at 100.

3.0 V, 76 ± 6 mA
24 ± 5 mV per % methane
Propane relative response 70
Zero drift under 5% LEL per month

Fixed detector sensors KGS 901, 902

KNC KGS 901 and KGS 902 are built for fixed gas detectors and are hardly affected by temperature and humidity. Sensitivity drift is under 3% per month and zero drift under 1% LEL per month. KGS 902 runs at 2.0 V and 270 ± 20 mA with T90 under 20 s.

Zero drift under 1% LEL per month
KGS 901: 30 ± 6 mV per % methane
KGS 902: 2.0 V, 270 ± 20 mA
KGS 902 T90 under 20 s

Hydrogen sensors KGS 704 and KGS 504

KNC KGS 704 and KGS 504 catalytic sensors are specialised for hydrogen in portable flameproof instruments. They run at 2.2 V and 70 ± 6 mA, deliver 38 ± 8 mV per % hydrogen and reach T90 under 5 s. Resistance to HMDS silicone and H2S inhibition is increased.

Hydrogen 0–100% LEL
2.2 V, 70 ± 6 mA
38 ± 8 mV per % hydrogen
T90 under 5 s

Fixed hydrogen sensor KGS 903

The KNC KGS 903 is built for fixed hydrogen detectors in flameproof design. It runs at 2.0 V and 70 ± 6 mA, delivers 40 ± 8 mV per % hydrogen and reaches T90 under 5 s. Sensitivity drift is under 2% per month and zero drift under 1% LEL per month.

2.0 V, 70 ± 6 mA
40 ± 8 mV per % hydrogen
Sensitivity drift under 2% per month
T90 under 5 s

Domestic sensors KGS 601 and KGS H02

KNC KGS 601 is a catalytic sensor for domestic and industrial gas alarms: 2.4 ± 0.1 V supply, 35 ± 5 mV per % methane, ambient −20 to +50 °C. KGS H02 detects hydrogen at 2.0 V and most combustible gases at 2.7 V, with high resistance to silicone poisoning.

KGS 601: 2.4 ± 0.1 V
KGS 601: 35 ± 5 mV per % methane
KGS H02: hydrogen at 2.0 V
KGS H02: methane at 2.7 V

Semiconductor sensor KGS 102 (SnO2)

The KNC KGS 102 is a tin dioxide semiconductor sensor for gas alarms, air cleaning and auto-ventilation systems. Its heater takes AC or DC 5 V at 160 ± 10 mA, power consumption is 800 ± 50 mW, and sensor resistance in clean air is 20–80 kΩ.

Heater 5 V, 160 ± 10 mA
Power 800 ± 50 mW
Resistance 20–80 kΩ in clean air
Operates −10 to +50 °C

Choosing a KNC sensor by gas and instrument type

KNC manufactures catalytic bead sensors for combustible gases, dedicated hydrogen sensors and tin dioxide semiconductor sensors. KNC catalytic sensors detect both LPG and LNG at the same operating voltage without LNG sensitivity degradation.

Portable gas detectors use KGS 701, 702, 703, KGS 501, 502 and the compact KGS 801; fixed detectors use KGS 901 and KGS 902. Hydrogen is measured by KGS 704 and KGS 504 in portable instruments and by KGS 903 in fixed systems.

Explosion-proof series and conditions of use

The KGS 500, 700, 800 and 900 series use an Ex db IIC flameproof housing with ATEX, IECEx and UKEX approvals; the KGS 700 and 800 series are also listed to UL 913 and CSA. Ambient range is −40 to +55 °C in Gb and −20 to +55 °C in Ga.

The housing is stainless steel 316 or 316L. Sensor pins connect to a gas detector with an intrinsically safe supply, and installation and maintenance follow EN/IEC 60079-14 and 60079-17.

Domestic gas alarms and semiconductor sensors

For domestic and industrial gas alarms KNC offers the KGS 601 at 2.4 ± 0.1 V and the dual-mode KGS H02, which detects hydrogen at 2.0 V and combustible gases at 2.7 V.

The KGS 102 tin dioxide semiconductor sensor serves gas alarms, air cleaning and auto-ventilation systems; its heater takes 5 V and power consumption is 800 ± 50 mW.

KNC / Korea New Ceramics and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of KNC / Korea New Ceramics and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.