Environment Protection System INC.Environment Protection System INC.

GAS DETECTION SENSORGAS DETECTION SENSOR

CATALYTIC SENSORCATALYTIC SENSOR

Catalytic Bead Catalytic Bead 觸媒觸媒珠珠

Wheatstone Bridge Wheatstone Bridge

No Temperature or No Temperature or Humidity Effect Humidity Effect

Silicone Resistant Silicone Resistant

0-100% L.E.L. Scale0-100% L.E.L. Scale

Catalyzed

Passivated Bead

Wheatstone Bridge Wheatstone Bridge

DC Supply

Output

Detector

Compensator

ElectrochemicalElectrochemical

Current Generating Electrolytic Current Generating Electrolytic Reaction Reaction

Specificity to Gas of Interest Specificity to Gas of Interest

PPM for Toxics or Percent PPM for Toxics or Percent Volume for OxygenVolume for Oxygen

Sensing-electrode2CO + 2H2O 2CO2 + 4H+ + 4e-

Counter-electrodeO2 + 4H+ + 4e 2H2O

Cell reaction2CO + O2 2CO2

Sensing-electrode2CO + 2H2O 2CO2 + 4H+ + 4e-

Counter-electrodeO2 + 4H+ + 4e 2H2O

Cell reaction2CO + O2 2CO2

隔膜電池式Membrane Type Galvanic Cell Method

隔膜電池式Membrane Type Galvanic Cell Method

mVmV

陽極陽極電解液電解液

陰極陰極

隔膜隔膜

信號端子信號端子

21 50 10021 50 100

20 10

20 10

感應器信號

感應器信號

(mV)(mV)

氧氣濃度 (%O2)氧氣濃度 (%O2)

陰極 陰極 (( 貴金屬貴金屬 )) O2+2H2O + 4e- 40H- O2+2H2O + 4e- 40H-

陽極 陽極 (( 鉛鉛 )) 2Pb 2Pb 2Pb2 + 4e-2Pb2 + 4e-

Sensing: CO + H2O CO2 + 2H+ + 2e-Counter: ½O2 + 2H+ + 2e- H2OAnd the overall reaction is: CO + ½O2 CO2

Sensing: CO + H2O CO2 + 2H+ + 2e-Counter: ½O2 + 2H+ + 2e- H2OAnd the overall reaction is: CO + ½O2 CO2

SPECTROGRAMSPECTROGRAM

InfraredInfrared

Methane or Propane Methane or Propane

Carbon Dioxide Carbon Dioxide

Accurate Accurate

Large Measurement Large Measurement Range Range

Low MaintenanceLow Maintenance

SampleSample Cell

DetectorDetector SourceSource

Light Absorption sensors are becoming more affordable and more reliable. Light Absorption sensors are becoming more affordable and more reliable. They are used for optically absorbing gases that fall in the infrared (IR), They are used for optically absorbing gases that fall in the infrared (IR), visible, or ultraviolet (UV) spectral ranges. Some gases reliably detected visible, or ultraviolet (UV) spectral ranges. Some gases reliably detected by optical sensors are: carbon dioxide, methanol, hydrogen cyanide, by optical sensors are: carbon dioxide, methanol, hydrogen cyanide, chlorine, refrigerant gases and naphthalene. chlorine, refrigerant gases and naphthalene.

SEMICONDUCTOR SENSOR

SEMICONDUCTOR SENSOR

SENSOR ARRAYSENSOR ARRAY

High-Temperature Gas Sensor ArrayHigh-Temperature Gas Sensor Array

SENSOR ARRAY

APPLICATION

SENSOR ARRAY

APPLICATION

Methanol Concentration SensorMethanol Concentration Sensor

Integrated Sensing Systems, Inc. (ISSYS) in Ypsilanti, Michigan, announced the small methanol concentration sensors under development, targeting the active Direct Methanol Fuel Cell (DMFC) market. These small sensors can also be utilized in a variety of other industrial and analytical applications for the need of a low-cost, accurate, small, inline density or chemical concentration sensors

Integrated Sensing Systems, Inc. (ISSYS) in Ypsilanti, Michigan, announced the small methanol concentration sensors under development, targeting the active Direct Methanol Fuel Cell (DMFC) market. These small sensors can also be utilized in a variety of other industrial and analytical applications for the need of a low-cost, accurate, small, inline density or chemical concentration sensors

( 化學式 CH3OH)( 化學式 CH3OH)