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GAS SENSING
TECHNOLOGY

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GAS SENSOR

Development

We are constantly investing in R&D to develop new sensor that can not be imitated by developing our own technology.

Manufacturing

We have wide business area in gas field as a specialized
company in gas sensing and provide customized gas
sensors to customers in various gas fields not only industrial
gas but also safety gas.

Distribution

We provide the service in sensor development and distribution. And we also have many partnership with global leading gas sensor companies such as DD Scientific, Dynament, Alphasense, City technology, Ion Science, Membrapor etc to meet diverse customer’s needs.

OUR GAS SENSOR PARTNERS

VIEW THE SENSOR BY TECHNOLOGY

The electrochemical gas sensor measures the gas concentration through
the generated current value when an ocidation or reduction reaction corrurs
at electrode as by diffusion barrier restricts the flow of the target gas to electrode.
Infrared gas sensor measures gas through light absorption rate according
to gas concentration. Its strength is high precision, long-term performance stability
and flexibility, and excellent repeatability compared to other sensors.
Catalytic combustion gas sensor measures the gas concentration by converting the change
of platium resistance line 's resistance into electrical signal when its electrical resistance is increased
by heating the platinum resistance line by deliver the electrical current. And it is suitable
for detecting inflammable gas because it is not affected by non-combustible gas.

*Note : High concentration gas cannot be detected. and it required to constant environment
because of its sensitiveness to change of humidity and voltage.

The semiconductor gas sensor measures the gas by the change in electrical conductivity
that occurs when the gas contact with the surface of semiconductor. It has various strengths
such as wide detection range, fast response speed, strong durability against vibration and shock,
high sensitivity and small size, but it has disadvantage of lower reliability compared to electrochemical
gas sensor because it has low selectivity for target gas and cannot detect multiple gases at the same time.
Sensor Size
Electrochemical Gas sensor The below specifications are parts of entire specifications.
Please contact us for the detailed specifications of gas sensors not described below.

O2 Sensor

LIST

Part No. DDS (S+4OX)
Type Electronic Chemical
Output signal 0.10 ± 0.03 mA
Measurement Range 0 - 25% Oxygen
Response Time(T90) < 10 seconds (typically <5 seconds)
Warranty > 24 months from date of dispatch

Part No. Alpha (O2-A2)
Type Electronic Chemical
Output signal µA @ 20.9% O2 80 to 120
Measurement Range 0 - 25% Oxygen
Response Time(T90) < 15 seconds
Warranty > 24 months from date of dispatch

CO Sensor

LIST

Part No. DDS(GS+4CO)
Type Electronic Chemical
Output signal 70 ± 20 nA / ppm
Measurement Range 0 - 2000 ppm
Response Time(T90) < 30 seconds
Warranty > 24 months from date of dispatch

Part No. Alpha(CO-AX)
Type Electronic Chemical
Output signal nA/ppm in 400ppm CO 55 to 100
Measurement Range 0 - 2000 ppm
Response Time(T90) < 30 seconds
Warranty > 24 months from date of dispatch

H2 Sensor

LIST

Part No. DDS(GS+4H2-5000)
Type Electronic Chemical
Output signal 10±5 nA / ppm
Measurement Range 0 - 5000 ppm
Response Time(T90) < 40 seconds
Warranty >12 months from date of dispatch

Part No. Alpha(H2-AF)
Type Electronic Chemical
Output signal nA/ppm in 400ppm at 23°C 10 to 40
Measurement Range 0 - 5000 ppm
Response Time(T90) < 35 Seconds
Warranty >24 months from date of dispatch

H2S Sensor

LIST

Part No. DDS(GS+4H2S)
Type Electronic Chemical
Output signal 700 ± 250 nA / ppm
Measurement Range 0 - 100 ppm
Response Time(T90) < 30 seconds
Warranty > 24 months from date of dispatch

Part No. Alpha(H2S-A1)
Type Electronic Chemical
Output signal m in 20ppm H2S 550 to 900
Measurement Range 0 - 100 ppm
Response Time(T90) < 35 seconds
Warranty > 24 months from date of dispatch

Dual Toxic Sensor (CO&H2S)

LIST

Part No. DDS(GS+4DT)
Type Electronic Chemical
Output signal CO : 60 to 120 nA/ppm
H2S : 500 to 1100 nA/ppm
Measurement Range CO : 0 - 1000 ppm
H2S : 0 - 200 ppm
Response Time(T90) CO & H2S : < 30 seconds
Warranty > 24 months from date of dispatch

Part No. Alpha(COH-A2)
Type Electronic Chemical
Output signal CO : nA/ppm in 400ppm CO 50 to 100
H2S : nA/ppm in 20ppm H2S 650 to 1100
Measurement Range CO : 0 - 1000 ppm
H2S : 0 - 100 ppm
Response Time(T90) CO : < 35 seconds
H2S : < 30 seconds
Warranty > 24 months from date of dispatch

NH3 Sensor

LIST

Part No. DDS(GS+4NH3-100)
Type Electronic Chemical
Output signal 100 ± 30 nA / ppm
Measurement Range 0 - 100 ppm
Response Time(T90) < 75 seconds
Warranty >12 months from date of dispatch

Part No. Alpha(NH3-AF)
Type Electronic Chemical
Output signal nA/ppm in 50ppm NH3 15 to 40
Measurement Range 0 - 100 ppm
Response Time(T90) < 150 seconds
Warranty >24 months from date of dispatch

CL2 Sensor

LIST

Part No. DDS(GS+4CL2)
Type Electronic Chemical
Output signal 600 ± 200 nA / ppm
Measurement Range 0 - 10 ppm
Response Time(T90) < 60 seconds
Warranty >12 months from date of dispatch

Part No. Alpha(CL2-A1)
Type Electronic Chemical
Output signal nA/ppm in 10ppm Cl2 -350 to -750
Measurement Range 0 - 20 ppm
Response Time(T90) < 60 seconds
Warranty >24 months from date of dispatch

NO2 Sensor

LIST

Part No. DDS(GS+4NO2)
Type Electronic Chemical
Output signal 600 ± 150 nA / ppm
Measurement Range 0 - 30 ppm
Response Time(T90) < 30 seconds
Warranty > 24 months from date of dispatch

Part No. Alpha(NO2-A1)
Type Electronic Chemical
Output signal nA/ppm in 10ppm NO2 -250 to 650
Measurement Range 0 - 20 ppm
Response Time(T90) < 50 seconds
Warranty > 24 months from date of dispatch

O3 Sensor

LIST

Part No. DDS(GS+4O3)
Type Electronic Chemical
Output signal 1600 ± 600 nA / ppm
Measurement Range 0 - 20 ppm
Response Time(T90) < 120 seconds
Warranty >12 months from date of dispatch

Part No. Alpha(O3-AH)
Type Electronic Chemical
Output signal nA/ppm at 1ppm O3 -200 to -700
Measurement Range 0 - 20 ppm
Response Time(T90) < 80 seconds
Warranty >24 months from date of dispatch

VOC Sensor

LIST

Part No. ION Science (VOC Gas Sensor)
Type PID
Output signal 0.7 mV/ppm
Measurement Range 0-4000ppm
Response Time(T90) < 3 seconds
Warranty >12 months from date of dispatch

Part No. Alpha (PID-A15)
Type PID
Output signal min range 0.69 mV/ppm
typical range 1.1 mV/ppm
Measurement Range 0-4000ppm
Response Time(T90) < 2 seconds
Warranty >12 months from date of dispatch

HC Sensor

LIST

Part No. Dynament (HC Sensor)
Type Nondispersive infrared
Output signal 0.01% for 42.7 µV
Measurement Range 0-5-100% CH4 / 0-2% C3H8
Response Time(T90) CH4 & C3H8 < 30 seconds
Warranty >12 months from date of dispatch

Part No. Dynament (HC Sensor only C3H8)
Type Nondispersive infrared
Output signal 0.01% for 42.7 µV
Measurement Range 0-5% , 0-100%
Response Time(T90) C3H8 < 30 seconds
Warranty >12 months from date of dispatch

CO2 Sensor

LIST

Part No. Dynament (CO2 Sensor)
Type Nondispersive infrared
Output signal 10 ppm for 42.7 µV
Measurement Range 0-5000 ppm
Response Time(T90) < 30 seconds
Warranty >12 months from date of dispatch

Part No. Dynament (CO2 Sensor)
Type Nondispersive infrared
Output signal 0.01% for 42.7 µV
Measurement Range 0-1%, 0-2%, 0-3%, 0-4%, 0-5%, 0-10%, 0-100%
Response Time(T90) < 30 seconds
Warranty >12 months from date of dispatch
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