SGX Europe Sp. z o.o. T: +48 (0) 32 438 4778 Building 11 Ligocka St. 103, E: sales.is sgxsensortech.com 40-568 Katowice, www.sgxsensortech.com Poland IR3 Single Gas Series Datasheet Uncertified Infrared Single Gas Sensor (Portable and Fixed Systems) The SGX infrared sensors use the proven Non-Dispersive Infrared (NDIR) principle to detect and monitor the presence of gases. With an infrared source and specific filtering on the pyroelectric detectors mounted inside the optical/gas cavity, individual gases or types of gas can be identified and their concentrations determined. These sensors are suitable for reliable monitoring of gas levels in general applications that do not require a flameproof enclosure for hazardous environments. The IR3 series range of infrared sensors are suitable for reliable monitoring of gas levels where the infrared sensor size is restricted. On their own, these sensors cannot be placed in hazardous areas, but they are suitable for OPERATION installation in instrumentation that is hazard certified. To operate, the sensors must be interfaced to a suitable The IR3 series range has been designed for installation into circuit for power supply, output amplification and signal certified housings, monitoring of CO2 in hyperbaric processing. Sensor outputs require linearisation and applications (e.g. diving) where high pressures can exist or compensation for ambient temperature variation using applications where the accuracy is not too important (e.g. algorithms in the system firmware. This is necessary for school science projects) where the sensor zero can be set sensors to meet their full performance specification. An before use. external temperature sensor will be required for temperature compensation. Further compensation for pressure changes can also be made in an algorithm, provided there is a APPLICATIONS suitable input from a pressure sensor. Oil & Gas* School Science Equipment A set of Application Notes is available from the SGX Petrochemical* Confined Space Entry Sensortech Ltd website, to explain more about NDIR gas Steelworks* Indoor Air Quality sensing and provide advice for the end-user on interfacing Wastewater SCUBA Diving Equipment the sensors and processing signals. * When built into certified housing FEATURES TECHNICAL SPECIFICATION For detection of the following gases: Mechanical o Carbon Dioxide (IR31 Series), Dimensions See Outline o Hydrocarbons (IR32 series, IR33 series) Body material Stainless Steel Gas concentration ranges: o 0 - 5% Carbon Dioxide Approximate Weight 27g (also suitable for 0 to 0.5%v/v) o 0 - 100%v/v Hydrocarbons Environmental (also suitable for 0 to 100%LEL) 19.0mm sensor height Ambient temperature range Low power for operation: -20C to +55C Reference channel for self-compensation on most types storage: -20C to +55C Special gold plated optical gas cavity for stable signal Operational pressure range 30kPa to 130kPa levels (2000 kPa for IR31CE) Operational in varying temperature, pressure and Humidity range for operation 0 to 95% RH humidity and storage (Non-condensing) Fast response Rugged stainless steel construction Electrical No moving parts DC supply to detectors 3V to 5V Immunity from poisoning Typical power 180mW 5V Reliable fail-safe operation IR Source Supply +5V, 60mA (Recommended) (Square Wave at 4Hz, 50% duty cycle) Whilst SGX has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also reserves the right to change the specification of goods without notice. SGX accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of third party patents arising from the use of SGX products in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability. SGX Europe sp .z o.o. Poland REGON: 362332227 DS-0251, Issue 1, 20-Oct-2016, Page 1 SGX Europe Sp. Z o.o. T: +48 (0) 32 438 4778 Building 11 Ligocka St. 103, E: sales.is sgxsensortech.com 40-568 Katowice, www.sgxsensortech.com Poland CONFIGURATIONS Concentration Range * Mesh Sensor Gas Application(s) Type Highest Lowest Yes No Oil & Gas Petrochemical Steelworks IR31BC Wastewater School Science Equipment Confined Space Entry Indoor Air Quality Carbon Dioxide 0 to 5% 0 to 0.5% IR31CE SCUBA Diving Equipment School Science Equipment IR31SE IR32BC Oil & Gas Methane / Petrochemical 0 to 100% 0 to 100%LEL Hydrocarbons Steelworks IR33BC Wastewater * The Highest Concentration Range is the highest range the sensor is suitable. The Lowest Concentration Range is the lowest range the sensor is suitable. The use of the sensor beyond these ranges will affect the sensors performance. IR31BC The sensor has been designed for monitoring carbon dioxide up to 5%v/v. The sensor contains a reference channel for self- compensation, including degradation of the lamp and temperature compensation to some extent, although additional temperature compensation will still be required. The sensor has been design to, but not limited to, being built into a certified housing for use in explosive atmospheres. The open front (no mesh) of the sensor must be closed with a suitable gas diffusion membrane, e.g. stainless steel sintered disc or mesh. As well as preventing entry of dust and contamination, the membrane also acts as a partial reflector for infrared. This will cause a slight increase in the pyroelectric detector output voltages. It is important that the gas diffusion membrane be securely attached and rigid enough not to cause flexing and spurious signal instability during ambient temperature and pressure changes. IR31CE The sensor has been designed for monitoring carbon dioxide in hyperbaric applications where the operating pressure can be as high as 2000 kPa. Compensation for changes in pressure will be required using the signal from a suitable pressure sensor. The sensor contains a reference channel for self-compensation, including degradation of the lamp and temperature compensation to some extent, although additional temperature compensation will still be required. The sensor contains a mesh so does not need to be placed behind any other sinter or mesh and uses a reference detector which does not become responsive to carbon dioxide under high pressures which occurs with other infrared carbon dioxide sensors due to the effective broadening of the filter at the high pressures. The IR31CE must not be used for monitoring CO2 in mixtures including hydrocarbon gases or vapours. IR31SE The IR31SE is an economy sensor designed for applications where the accuracy is not too important and can be zeroed before use (e.g. school science project equipment). The sensor does not contain a reference detector for self-compensation, including degradation of the lamp and temperature compensation. The sensor does contain a mesh so does not need to be placed behind any other sinter or mesh. IR32BC The sensor is of the same construction as the IR31BC, except designed to monitor hydrocarbons up to 100%v/v but is also suitable for monitoring %LEL levels. The sensor cannot be used to monitor benzene. IR33BC The sensor is of the same construction as the IR31BC, except designed to monitor hydrocarbons up to 100%v/v but is also suitable for monitoring %LEL levels. When compared with the IR32BC the sensor has slightly higher response to humidity but lower cross sensitivity to other hydrocarbons when compared to methane. The sensor can also be used to detect benzene. SGX Sensortech 2016 Document subject to disclaimer on page 1 DS-0251, Issue 1, 20-Oct-2016, Page 2