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Quantifiable Toxic Gas Detection

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toxic gas detection and combustible/flammable gas detection
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About Toxic Gas Detection and Gas Monitoring

Toxic gas detector and toxic gas monitor by Sensidyne

Toxic gas detectors and toxic gas monitors from Sensidyne are designed to protect your plant from gas leaks, warning personnel of potential hazards before they become deadly. Our equipment ensures the maximum reliability in an instrument that is the easiest to install, easiest to use and easiest to maintain.

Sensidyne has been a leader in toxic gas detection for over 25 years developing equipment for common and exotic safety and air quality applications. We offer a wide range of point monitors with hazardous area and performance approvals.

Click here for a Toxic Gas Reference Chart
 

Specifying a Toxic Gas Detection System

The following is a basic outline of features to look for when specifying point gas monitors or open path detectors for toxic gas.

Fixed Point Toxic Gas Detectors

Installation

Additional costs can quickly add up when installing a point gas monitor. Make certain that the instrument you specify is easy to install and provides you with flexibility such as on board programmable relays, 2 or 3 wire units, a remote mountable sensor head and communication options.

Use

Using a gas detector should not be difficult, make sure your detector has a non-intrusive user interface, a large easy to read screen and a user-friendly menu structure. Point gas monitors that use transportable calibration and store operating parameters on the sensor such as default alarm levels, TWA, gas type and range streamline use of the monitor. Carefully specifying these options will ensure continuous use of the monitor is easy for users of all experience and technical levels.

Maintenance

Maintaining point detectors can be cumbersome if the instrument is not designed with the user in mind. Look for an instrument that has a functional sensor check built in which the transmitter has the ability to perform a bump test on the installed sensor. Make sure the system uses Smart Sensor Technology with transportable calibration that stores sensor data in non-volatile memory on the sensor and with the ability to review the last calibration date, sensor life and diagnostic information from the transmitter screen.

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Toxic Vapors & Gases Reference Chart



GAS OR LIQUID GAS OR VAPOR DATA1 ACGIH2 OSHA2 IDLH2 PPM CRITICAL HEALTH EFFECTS3 STANDARDS & REGULATIONS4 OSHA THRESHOLD QUANTITY5 EPA THRESHOLD QUANTITY5
Chemical Formula Relative Density LEL % Vol. TWA PPM STEL PPM PEL PPM
Ammonia, Anhydrous NH3 0.6 15.0 25 35 50 300 Irritant 29 CFR 1910.119A, 40 CFR 68 10,000 lbs 10,000 lbs
Ammonia Solutions >44% NH3 by Weight 25 35 50 300 Irritant 29 CFR 1910.119A, 40 CFR 68 15,000 lbs  
Arsine AsH3 2.7 n/a 0.05 - - 0.05 3 Blood, Kidney 29 CFR 1910.119A, 40 CFR 68 100 lbs 1,000 lbs
Boron Trichloride BCl3 4.1 n/a - - - - - - - - - - 29 CFR 1910.119A, 40 CFR 68 2,500 lbs 5,000 lbs
Bromine Br2 0.6 n/a 0.10 0.20 0.10 3 Irritant 29 CFR 1910.119A, 40 CFR 68 10,000 lbs 10,000 lbs
Carbon Dioxide CO2 1.5 n/a 5,000 30,000 5,000 40,000 Asphyxiant      
Carbon Disulfide CS2 2.6 2.0 10 - - 20 500 CVS, CNS, Neuropathy 40 CFR 68   20,000 lbs
Carbon Monoxide CO 1.0 12.5 25 - - 50 1200 Anoxia, CVS, CNS 40 CFR 68   10,000 lbs
Chlorine Cl2 2.5 n/a 0.5 1.0 1.0 10 Irritant 29 CFR 1910.119A, 40 CFR 68 1,500 lbs 2,500 lbs
Chlorine Dioxide ClO2 2.3 n/a 0.1 0.3 0.1 5 Irritant, Bronchitis 29 CFR 1910.119A, 40 CFR 68 1,000 lbs 1,000 lbs
Diborane B2H6 2.9 n/a 0.10 - - 0.10 15 CNS, Pulmonary 29 CFR 1910.119A, 40 CFR 68 100 lbs 2,500 lbs
Dichloro-silane SiH4Cl2 3.5 n/a - - - - - - - - - - 29 CFR 1910.119A, 40 CFR 68 2,500 lbs 10,000 lbs
Ethylene Oxide CH2OCH2 1.5 3.0 1.0 - - 1.0 800 Lung, Liver, Kidney, Blood 29 CFR 1910.119A, 40 CFR 68 5,000 lbs 10,000 lbs
Fluorine F2 1.3 n/a 1.0 2.0 0.1 25 Irritant 29 CFR 1910.119A, 40 CFR 68 1,000 lbs 1,000 lbs
Germane GeH4 2.7 n/a 0.2 - - - - - - - -      
Hydrazine N2H4 1.1 2.9 0.0 - - 1.0 50 Irritant, Liver 40 CFR 68   15,000 lbs
Hydrogen Bromide HBr 2.8 n/a - - 3 C 3.00 3 Irritant 29 CFR 1910.119A, 40 CFR 68 1,500 lbs 10,000 lbs
Hydrogen Chloride HCl 1.3 n/a - - 5 C 5 C 50 Irritant, Corrosive 29 CFR 1910.119A, 40 CFR 68 5,000 lbs 5,000 lbs
Hydrogen Cyanide HCN 0.9 5.6 - - 4.7 C 10.00 50 CNS, Irritant, Anoxia, Lung 29 CFR 1910.119A, 40 CFR 68 1,000 lbs 2,500 lbs
Hydrogen Fluoride HF 0.7 n/a 3 3 C 3 30 Irritation, Bones, Teeth 29 CFR 1910.119A, 40 CFR 68 1,000 lbs 1,000 lbs
Hydrogen Peroxide H2O2 1.2 n/a 1.0 - - 1.00 75 Irritation, Pulmonary Edema 29 CFR 1910.119A 7,500 lbs  
Hydrogen Sulfide H2S 1.2 4.0 10 15 20 C 100 Sudden Death, Irritation, CNS 29 CFR 1910.119A, 40 CFR 68 1,500 lbs 10,000 lbs
Nitric Oxide NO 1.0 n/a 25.0 - - 25.00 100 Anoxia, Irritation, Cyanosis 29 CFR 1910.119A, 40 CFR 68 250 lbs 10,000 lbs
Nitrogen Dioxide N2O 2.6 n/a 3 5 5 20 Irritation, Pulmonary Edema 29 CFR 1910.119A 250 lbs  
Oxygen Deficiency O2 0.9 n/a - - - - <19.5% <18% Asphyxiation 29 CFR 1910.146, Appendix C.    
Oxygen Enrichment O2 0.9 n/a - - - - >23.5% - - Fire 29 CFR 1910.104, NFPA 53M    
Ozone O3 1.7 n/a 0.1 - - 0.10 5 Pulmonary Function, Irritatant 29 CFR 1910.119A 100 lbs  
Phosgene COCl2 3.4 n/a 0.1 - - 0.1 2 Irritant, Pulmonary Function 29 CFR 1910.119A, 40 CFR 68 100 lbs 500 lbs
Phosphine PH3 1.2 1 - 2.0 0.3 1.0 0.30 50 Irritation, CNS, GI 29 CFR 1910.119A, 40 CFR 68 100 lbs 5,000 lbs
Silane SiH4 1.3 Pyrophoric 5 - - - - - - Irritant 40 CFR 68   10,000 lbs
Styrene C8H8 3.6 0.9 20.0 40 10.00 700 Neurotoxicity, Irritant 29 CFR 1910.106, NFPA 30    
Sulfur Dioxide SO2 2.3 n/a 2 5 5 100 Irritant 29 CFR 1910.119 Appendix A, 40 CFR 68 1,000 lbs 5,000 lbs
1 Density is relative to air of 1.0. Position sensors accordingly.
2 TWA: Threshold Limit Value for the Time Weighted Average concentration for an 8 hour workday of a 40 hour work week, to which a worker can be exposed continuously without adverse affect.
   STEL: Threshold Limit Value for the Short Term Exposure Limit, typically 15 minutes, to which a worker may be exposed without ill affects.
   C: The maximum allowable concentration to which one may be exposed.
   LEL is the lowest percent by volume at which ignition can occur. From NFPA 325.
   All TLV-TWA, TLV-STEL and IDLH data are from ACGIH or NIOSH. 2 OSHA
   PEL: Same as TLV-TWA definition but regulated by law. See 29 CFR 1910.1000, Tables Z1 and Z2.
3 Please consult ACGIH 2008 TLVs and BEIs for Critical Effects definitions.
4 CFRs are available at www.access.gpo.gov/nara/cfr/cfr-table-search. NFPA standards are at www.nfpa.org.
5 Threshold Quantity: The amount of a chemical that can be present before being required to comply with OSHA 29 CFR 1910.119, Process Safety Management, or the EPA Risk Management Program, 40 CFR 68.
   Terms - n/a: not applicable, - -: not given, <: Less than or equal to, >: Greater than or equal to,
   Gas: Substance is a gas at ambient temps. Note: The user of this table is responsible for verifyng the accuracy of the compliled information!

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