MGP261 Multigas Probe For methane, carbon dioxide, and humidity measurement Features • Compact in situ probe with CH4, CO2, and H2O vapor measurement • Superior long-term stability and repeatability with proprietary infrared technology — no calibration gases needed • Direct installation into process: no sample treatment needed • Certified for Ex Zone 0/1 • Probe heating eliminates condensation in wet processes • Corrosion-resistant stainless steel housing (IP66) • Standalone probe with digital Modbus RTU over RS-485 or 3 analog outputs (4 … 20 mA) • Compatible with Vaisala Insight PC software Vaisala CARBOCAPâ MGP261 Multigas Probe for Methane, Carbon Dioxide, and Humidity Measurement is designed for in situ measurements in demanding biogas processing conditions where repeatable, stable, and accurate measurement is essential. MGP261 is Ex certified for use in Ex Zone 0 (parts inserted into process) and Ex Zone 1 (parts outside the process). Up to three measurements in one compact unit MGP261 measures the main components of biogas and landfill gas: methane (CH4), carbon dioxide (CO2), and humidity. These gases make up the bulk of biogas, and measuring all three parameters gives you a 100% picture of the process. MGP261 measures CH4, CO2, and humidity in vol-% units, or alternatively dewpoint temperature (Td) in °C. Methane measurement for biogas quality and process control Methane concentration measurement tells you the calorific value of the gas produced in real time. With internal temperature measurement for compensation purposes and an option for external pressure or temperature compensation input, the patented CARBOCAPâ measurement gives unparalleled stability and reliability without calibration gases. Application areas include anaerobic digestion and landfill gas monitoring, activated carbon filter monitoring in biogas treatment process, and CHP engine feed gas monitoring. Direct in situ measurement without sample treatment MGP261 measures gases directly in the process pipeline without a need for moisture removal. This simplifies the measurement both in situ and as part of an extractive system with optional flow through cell accessory. The heated optical elements provide reliable measurements even in most demanding process conditions with condensate in the process gas. Robust, weatherproof, and Ex certified for zones 0 and 1 MGP261 is Ex certified for use in Ex Zone 0 (parts inserted into process) and Ex Zone 1 (parts outside the process). The electronics and optics of the IP66-rated instrument are protected by encapsulation in a potting compound to ensure maximum resistance to weather, dust, and ingress of process gases in the probe. Materials exposed to process gas are carefully selected for good chemical resistance against hydrogen sulfide: they include stainless 316L steel and polytetrafl

Technical data Measurement performance Measurement unit CE, China RoHS, RCM ATEX (Europe), IECEx (international), cMETus (USA and Canada), CML (Japan) 1) Ex II 1/2 (1) G Ex eb mb [ia] IIB T3 Ga/Gb -40 °C ≤ Tamb ≤ +60 °C Class I, Division 2, Groups C, D; T3 Measurement range EMC compatibility Compliance marks Accuracy specification at 25 °C (+77 °F) and 1013 mbar including nonlinearity, calibration uncertainty, and repeatability; temperature and pressure compensated Accuracy at +25 °C (+77 °F) and 1013 mbar 1) Operating temperature range Temperature dependence, uncompensated Pressure dependence,...