Catalytic Bead Gas Sensor Technology
"Detect the Difference" with Detcon Gas Detection Sensors, Control Systems & Process Analyzers
LEL Combustible Catalytic Bead Gas Detection Sensor Technology • Non Selective Combustible Gas • 3 to 5 Year Life Expectancy • Rugged Construction • Field Replaceable Components • Simple Calibration • Poison Resistant Detcon catalytic bead gas detection sensor assemblies are designed to monitor ambient air for concentrations of combustible gas in the range of 0-100% of the lower explosive limit (LEL). The sensor technology is of the catalytic pellistor type and consists of matched pair catalytic bead detectors located in a plug-in field-replaceable sensor package. Catalytic bead sensors show an excellent response to a long list of combustible gases. This technique is non-selective and may be used for the detection and monitoring of several target combustible gases. The Detcon sensor is specifically designed to be poison resistant and is capable of providing reliable performance for periods of 5-10 years in most industrial environments. The technology is offered in four explosion-proof instrument packages with varying features as shown at right and described in the following PDF brochures. LEL Sensor Brochures in .PDF Format LEL Sensors 6-panel full color brochure (TP-424, TP-524, TP-624) Model Series 700 6-panel full color brochure. Certifications FP-424C (T) CSA 09-10-02.pdf FP-524C (T) CSA 09-10-03.pdf FP-624C (T) CSA 09-10-03.pdf TP-700 CSA UL Sensors Classified Can.pdf UL Sensors Classified US.pdf ATEX 700-FP FP-700 Detcon Model FP-700 Combustible Gas sensors are non-intrusive “Smart” sensors designed to detect and monitor Combustible Gas in air over the range of 0-100% LEL (lower explosive limit). • Microsafe Sensor • 4-20 mA, RS-485, Relays • Non-Intrusive Interface • Environmentally Bulletproof • Electropolished 316SS • 100% Encapsulated Circutry • Water-Corrosion Proof • Multi-Layer Surge Protection • Preemptive Fault Diagonostics • SIL 2 Compliant PDF Documents TP-700 Data Sheet TP-700 Eng. Specs - Tab TP-700 Eng. Specs - Text FP-624C Detcon Model FP-624C sensors are nonintrusive “Smart” sensors designed to detect and monitor Combustible Gas in air over the range of 0-100% LEL (lower explosive limit). • Microsafe Sensor • 4-20 mA, RS-485, Relays • Non-Intrusive Interface PDF Documents FP-624C Data Sheet FP-624C Eng. Specs FP-524C Detcon Model FP-524C sensors are nonintrusive “Smart” sensors designed to detect and monitor Combustible Gas in air over the range of 0-100% LEL (lower explosive limit). • Microsafe Sensor • 4-20 mA Output • Non-Intrusive Interface PDF Documents FP-524C Data Sheet FP-524C Eng. Specs FP-424C Detcon Model FP-424C sensors are designed to detect and monitor Combustible Gas in air over the range of 0-100% LEL (lower explosive limit). • Standard 4-20 mA PDF Documents FP-424C Data Sheet FP-424C Eng. Specs Principle of Operation Method of detection is by diffusion/adsorption. Air and gas diffuse through a sintered stainless steel filter and contact both the active and reference detector beads. The heated surface of the active detector promotes oxidation of the combustible gas molecule while the reference detector has been treated not to support this oxidation. The reference detector serves as a means to maintain zero stability over a wide range of environmental conditions. When combustible gas molecules are oxidized on the active detector, incremental heat is generated and its resistance changes. Change in resistance is accurately measured using a Wheatstone bridge circuit. Detectable Gases Acetaldehyde iso-Butyl Alcohol Ethane Methyl Acetate n-Propyl Alcohol Acetic Acid tert-Buty-alcohol Ethyl Acetate Methyl Alcohol n-Propylamine Acetic Anhydride n-Butyl Benzene Ethyl Alcohol Methylamine Propylene Acetone iso-Butyl Benzene Ethylamine Methylcyclohexane Propyleneoxide Acetylene n-Butyric Acid Ethyl Benzene Dimethyl Ether iso-Propylether Alkyl Alcohol Carbon Disulphide Ethylcyclopentane Methylethylether Propyne Ammonia Carbon Monoxide Ethylene Methylethylketone Toluene n-Amyl Alcohol Carbon Oxysulphide Ethyleneoxide Methyl Formate Triethylamine Aniline Cyanogen Diethyl Ether Methylmercaptan Trimethylamine Benzene Cyclohexane Ethyl Formate Methylpropionate Vinyl Chloride Biphenyl Cyclopropane Ethylmercaptan Methyl n-propylketone Vinylethylether 1,3-Butadiene Decane n-Heptane Naphthalene o-Xylene Butane Diethylamine n-Hexane Nitromethane m-Xylene iso-Butane Dimethylamine Hydrazine n-Nonane p-Xylene Butene-1 2,3-Dimethylpentane Hydrogencyanide n-Octane cis-Butene-2 2,2-Dimethylpropane Hydrogen n-Pentane trans-Butene-2 Dimethylsulphide Hydrogen Sulphide iso-Pentane Call for others… n-Butyl Alcohol 1,4-Dioxane Methane Propane
Detcon Inc. 3200 Research Forest Drive, A-1 • The Woodlands, Texas 77381, USA Phone 713-559-9200 • Toll Free 888-367-4286 • Fax 281-292-2860 • Email: sales@detcon.com