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Electrochemical Sensors for Hazardous Gas Detection

SemeaTech, a world leader in sensing technologies, offers a full line of electrochemical sensors for detecting hazardous materials and gases for work safety and environmental protection.
SemeaTech has built a wide network of industry experts and technologists to provide the company with guidance for customer needs and market requirements in order to release the right products featuring minimized environmental impact, no application errors, higher resolutions, increased sensitivity, improved stability, better exchangeability, wider measuring ranges, etc.

It is recommended that you mount the SemeaTech electrochemical sensors in a socket where they can be removed and replaced when their working life expires (electrolyte is used up).
 

4 Series Electrochemical Gas Sensors

Size Product Gas Range Resolution Response Part No.
4 Series 4CO-50 CO
Carbon Monoxide
0-50 ppm 0.15 ppm <30s 051-1200-000
4CO-100 0-100 ppm 0.15 ppm <30s 051-1100-000
4CO-500 0-500 ppm 1 ppm <15s 051-0000-000
4CO-500S 0-500 ppm 1 ppm <20s  
4CO-1000 0-1000 ppm 1 ppm <15s 051-0500-000
4CO-2000 0-2000 ppm 10 ppm <30s 051-0100-000
4CO-5000 0-5000 ppm 10 ppm <30s 051-0900-000
4CO-10000 0-10,000 ppm 10 ppm <30s 051-0800-000
4CO-20000 0-20,000 ppm 10 ppm <30s 051-1000-000
4C2H3CL-20 C2H3Cl
Vinyl Chloride
0-20 ppm     067-0200-000
4C2H3CL-100 0-100 ppm     067-0000-000
4CH2O-10 CH2O
Formaldehyde
0-10 ppm     072-0000-000
4CH2O-50 0-50 ppm      072-0100-000
4ETO-10 C2H4O
(ETO) Ethanol, etc.
0-10 ppm 0.1 ppm ≤120s 055-0000-000
4ETO-100 0-100 ppm 1 ppm ≤120s 055-0100-000
4ETO-500 0-500 ppm 10 ppm ≤120s 055-0200-000
4CH3SH-10 CH3SH
Methanethiol
0-10 ppm     065-0000-000
4CL2-10 Cl2
Chlorine
0-10 ppm     062-0100-000
4CL2-50 0-50 ppm     061-0400-000
4CL2-200 0-200 ppm     061-0000-000
4CLO2-1 ClO2
Chlorine Dioxide
0-1 ppm     061-0100-000
4CLO2-10 0-10 ppm     061-0400-000
4CLO2-50 0-50 ppm     061-0000-000
4H2-1000 H2
Hydrogen
0-1000 ppm 10 ppm ≤70s 054-0000-000
4H2-2000 0-2000 ppm   ≤70s 054-0400-000
4H2-40000 0-40000 ppm 80 ppm ≤70s 054-0100-000
4CL2-10 HCl
Hydrogen Chloride
0-10 ppm     063-0000-000
4CL2-200 0-200 ppm     063-0200-000
4HCL-50 HCN
Hydrogen Cyanide
0-50 ppm     064-0000-000
4HF-10 HF
Hydrogen Floride
0-10 ppm     069-0000-000
4HF-100   0-100 ppm   069-0100-000
4H2S-50 H2S
Hydrogen Sulfide
0-50 ppm 0.1 ppm <25s 052-0400-000
4H2S-100 0-100 ppm 0.1 ppm <30s 052-0000-000
4H2S-500 0-500 ppm 0.1 ppm ≤45s 052-1500-000
4H2S-1000 0-1000 ppm 1 ppm <45s 052-0100-000
4H2S-2000 0-2000 ppm 1 ppm <45s 052-0600-000
4H2S-5000 0-5000 ppm 1 ppm <45s 052-0700-000
4NH3-20 NH3
Ammonia
0-20 ppm (0 Bias)   059-0900-000
4NH3-100  0-100 ppm <40s 059-0000-000
4NH3-500 0-500 ppm <40s 059-0500-000
4NH3-1000 0-1000 ppm <40s 059-0100-000
4NH3-2000 0-2000 ppm   059-0600-000
4NH3-100L NH3
(Long Life)
Ammonia
0-100 ppm (0 Bias)   059-1200-000
4NH3-500L 0-500 ppm   059-1100-000
4NH3-1000L 0-1000 ppm   059-1300-000
4NH3-2000L 0-2000 ppm   059-1400-000
4NH3-5000L 0-5000 ppm   059-1500-000
4NO-5 NO
Nitrogen Oxide
0-5 ppm     058-0300-000
4NO-250 0-250 ppm     058-0000-000
4NO-2000 0-2000 ppm     058-0100-000
4NO2-5 NO2
Nitrogen Dioxide
0-5 ppm     057-0300-000
4NO2-20 0-20 ppm 0.1 ppm <30s 057-0000-000
4NO2-2000 0-2000 ppm 5 ppm <60s 057-0100-000
4O2-25 O2 Oxygen 0-25% 0.1% <20s 053-0000-000
4O3-1 O3
Ozone
0-1 ppm     068-0400-000
4O3-10 0-10 ppm     068-0000-000
4O3-100 0-100 ppm     068-0100-000
4O3-1000 0-1000 ppm      
4PH3-20 PH3
Phosphine
0-20 ppm     060-0000-000
4PH3-1000 0-1000 ppm     060-0100-000
4PH3-2000 0-2000 ppm     060-0400-000
4SO2-5 SO2
Sulfer Dioxide
0-5 ppm     056-0400-000
4SO2-20 0-20 ppm 0.1 ppm <45s 056-0000-000
4SO2-100 0-100 ppm     056-0500-000
4SO2-2000 0-2000 ppm   ≤45s 056-0100-000

4 Series Low Explosion Level (LEL) Combustable Gas Sensors
(Catalytic)

Size Product Gas Range Resolution Response Part No.
4 Series 4LEL-D-2.5/3.0 Combustable
Gas
      090-DX00-000
4LEL-H-2.0       090-H000-000

7 Series Electrochemical Sensors

Size Product Gas Range Resolution Response Part No.
7 Series 7CO-50    CO
Carbon Monoxide
0-50 ppm 0.5 ppm ≤30s 051-1300-000
7CO-1000 0-1000 ppm 0.5 ppm <30s 051-0200-000
7CO-2000 0-2000 ppm 0.5 ppm <30s 051-0600-000
7CO-10000 0-10,000 ppm 5 ppm <30s 051-0700-000
7C2H3CL-50 C2H3Cl
Vinyl Chloride
0-50 ppm 1 ppm ≤120s 067-0300-000
7C2H3CL-100 0-100 ppm   ≤120s 067-0100-000
7CH2O-10 CH2O
Formaldehyde
0-10 ppm     072-0200-000
7CH2O-50  0-50 ppm     072-0300-000
7ETO-20 C2H4O
(ETO) Ethanol, etc.
0-20 ppm 0.1 ppm ≤120s 055-0400-000
7ETO-100 0-100 ppm 1 ppm ≤120s 055-0300-000
7CH3SH-10 CH3SH
Methanethiol
0-10 ppm 0.1 ppm ≤60s 065-0100-000
7CL2-20 CL2
Chlorine
0-20 ppm 0.1 ppm <30s 062-300-000
7CL2-50 0-50 ppm   <30s 062-0400-000
7CLO2-1 ClO2
Chlorine Dioxide
0-1 ppm     061-0200-000
7CLO2-20 0-20 ppm 0.1 ppm ≤60s 061-0300-000
7H2-1000 H2
Hydrogen
0-1000 ppm     054-0200-000
7H2-10000 0-10000 ppm 0.03 ppm ≤100s 054-0300-000
7H2-20000 0-20000 ppm     054-0500-000
7HCL-20 HCl
Hydrogen Chloride
0-20 ppm     063-0400-000
7HCL-50 0-50 ppm 1 ppm ≤70s 063-0100-000
7HCL-100 0-100 ppm     063-0300-000
7HCN-50 HCN
Hydrogen Cianide
0-50 ppm 0.2 ppm ≤120s 064-0100-000
7HF-10 HF
Hydrogen Floride
0-10 ppm 0.5 ppm  ≤120s 069-0300-000
7HF-50 0-50 ppm 0.5 ppm <120s 069-0200-000
7H2S-50 H2S
Hydrogen Sulfide
0-50 ppm 0.1 ppm <30s 052-0300-000
7H2S-100 0-100 ppm 0.25 ppm <30s 052-0500-000
7H2S-200 0-200 ppm   <30s 052-0200-000
7H2S-500 0-500 ppm   <30s 052-1300-000
7H2S-1000 0-1000 ppm   <30s 052-0800-000
7H2S-2000 0-2000 ppm   <30s 052-0900-000
7H2S-5000 0-5000 ppm   <30s 052-1100-000
7H2S-10000 0-10000 ppm   <30s 052-1400-000
7NH3-100 NH3
Amonia
0-100 ppm 0.1 ppm <40s 059-0200-000
7NH3-200 0-200 ppm   <60s 059-0800-000
7NH3-500 0-500 ppm 2 ppm <40s 059-0400-000
7NH3-1000 0-1000 ppm   <40s 059-0300-000
7NH3-2000 0-2000 ppm 5 ppm ≤90s 059-0700-000
7NO-100 NO
Nitrogen Oxide   
0-100 ppm 1 ppm ≤60s 058-0200-000
7NO2-5    NO2
Nitrogen Dioxide
0-5 ppm 25 ppb ≤30s 057-0400-000
7NO2-20 0-20 ppm 0.1 ppm <30s 057-0200-000
7NO2-100 0-100 ppm   0.5 ppm ≤100s 057-0500-000
7NO2-500 0-500 ppm      
7O3-1 O3
Ozone
0~1 ppm 0.02 ppm <45s 068-0300-000
7O3-20 0-20 ppm   <45s 068-0200-000
7O3-100 0-100 ppm 0.5 ppm <45s 068-0500-000
7PH3-5 PH3
Phosphine
0-5 ppm     060-0300-000
7PH3-2000 0-2000 ppm 1 ppm ≤60s 060-0200-000
7SO2-5 SO2
Sulfer Dioxide
0-5 ppm 0.2 ppm ≤45s 056-0600-000
7SO2-20 0-20 ppm 0.1 ppm ≤45s 056-0200-000
7SO2-2000 0-2000 ppm 5 ppm ≤60s 056-0300-000

Stack Emission Monitoring Electrochemical Sensors

The 3 Series (CO, SO2, NO2 and NO) are designed for stack emission monitoring. They can be used in the environment with those high concentration gases for a long time. The sensor electrodes are much bigger and deposited with thicker chemical compounds. The electrolyte used in the 3 Series Gas Sensors can sustain tougher environmental conditions than the 4 and 7 Series sensors. The 3 Series can continuously detect those high concentration gases. The 4 and 7 Series are designed to work in the relative clean environment most of time but detect toxic gases if there are leakages.

Size Product Gas Range Resolution Response Part No.
3 Series 3CO-10000 CO 0-10000 1 ppm ≤30s 051-3000-000
3CO-20000 CO 0-20000 1 ppm    
3NO-2000 NO 0-2000 1 ppm ≤25s 058-3000-000
3NO2-500 NO2 0-500 0.5 ppm ≤35s 057-3000-000
3S02-500 SO2 0-500   ≤35s  
3SO2-2000 SO2 0-2000 1 ppm ≤35s 056-3000-000

Sensor Module PCB

  SM ECM Smart         A01-0000-000
  SM ECM-12C         A01-0100-000



Application Notes: