Environment Protection System INC.

GAS DETECTION SENSOR

CATALYTIC SENSOR

Catalytic Bead 觸媒珠 Wheatstone Bridge No Temperature or Humidity Effect Silicone Resistant 0-100% L.E.L. Scale Catalyzed Passivated Bead

Wheatstone Bridge DC Supply Output Detector Compensator

Electrochemical Current Generating Electrolytic Reaction Specificity to Gas of Interest PPM for Toxics or Percent Volume for Oxygen Sensing-electrode 2CO + 2H2O 2CO2 + 4H+ + 4e- Counter-electrode O2 + 4H+ + 4e 2H2O Cell reaction 2CO + O2 2CO2 Sensing-electrode 2CO + 2H2O 2CO2 + 4H+ + 4e- Counter-electrode O2 + 4H+ + 4e 2H2O Cell reaction 2CO + O2 2CO2

隔膜電池式 Membrane Type Galvanic Cell Method 隔膜電池式 Membrane Type Galvanic Cell Method mV 陽極 電解液 陰極 隔膜 信號端子 感應器信號感應器信號 感應器信號感應器信號 (mV) 氧氣濃度 (%O2) 陰極 ( 貴金屬 ) O2+2H2O + 4e- 40H- 陽極 ( 鉛 ) 2Pb2Pb2 + 4e-

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

SPECTROGRAM

Infrared Methane or Propane Carbon Dioxide Accurate Large Measurement Range Low Maintenance Sample Sample Cell DetectorSource Light Absorption sensors are becoming more affordable and more reliable. They are used for optically absorbing gases that fall in the infrared (IR), visible, or ultraviolet (UV) spectral ranges. Some gases reliably detected by optical sensors are: carbon dioxide, methanol, hydrogen cyanide, chlorine, refrigerant gases and naphthalene.

SEMICONDUCTOR SENSOR

SENSOR ARRAY

High-Temperature Gas Sensor Array

SENSOR ARRAY APPLICATION SENSOR ARRAY APPLICATION

Methanol 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 ( 化學式 CH3OH)