IR400 Point IR Gas Detector
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Combustible Gas GENERAL MONITORS Protection for life. Infrared Point Detector for Combustible Gas Detection • True fail-to-safe operation • True gas detection performance • Heated optics • Eliminates condensation • No routine calibration required • Multiple communication outputs • Dirty optics indication • T90 < 3 seconds (w/splash guard) Description The Model IR400 infrared (IR) point detector is a microprocessor-based combustible gas detector that continuously monitors combustible gases in the lower explosive limit (LEL) range and provides a 4 to 20 mA analog signal proportional to the 0 to 100% LEL concentration. The detector also monitors other conditions such as supply voltage and optical path integrity. The IR400 detection principle is based on measuring the absorption of infrared radiation passing through a volume of gas using a dual beam, single detector method. The IR detector measures the intensity of two specific wavelengths, one at an absorption wavelength and another outside of the absorption wavelength. The gas concentration is determined by a comparison of these two values. Most industrial point IR gas d etection applications require a splash guard to protect the sensing element from rain and other environmental conditions. In many cases, the addition of a splash guard slows the speed of response considerably and should be taken into consideration. The IR400 gas detector responds within three seconds to gas leaks even with a splash guard installed. Configurations with analog output, Modbus, and HART are available. The IR400 provides a two-wire RS-485 addressable communications link conforming to the • Provides complete status and control capability in the control room • Discriminates between true fault and cleaning requirements • Industry-leading speed of response Modbus protocol that is used to monitor the IR400’s status and settings in order to simplify installation and maintenance. Data available through HART or Modbus, such as configuration device settings and stored maintenance records, can be used to perform diagnostics and take corrective action before a problem occurs. The IR400 is calibrated at the factory and needs no routine field calibration. It requires only a periodic cleaning of the windows and re-zeroing to ensure dependable performance. Applications • Chemical Plants • Compressor Stations • Drilling and Production Platforms • Fuel Loading Facilities • LNG / LPG Processing and Storage Facilities • Wastewater Treatment Facilities

MODEL IR400 System Specifications Detector Type: Measuring Range: Detector Life: Zero Drift: Infrared absorption type 0 to 100% LEL 0 to 100% by volume (methane only) Greater than 5 years Readout / Relay Display Modules: DC110; TA102A; IR4000 display, and relay alarms Junction box, duct mount junction box, calibration cup, flow block, splash guard, rain guard, portable purge calibrator Class I, Divisions 1 & 2, Groups B, C & D, IP66, Type 4X Ex d, IIB+H2 T5, Gb, IP66 (Ta= -60°C to +75°C) Ex t IIIC T100°C Db Two years ATEX, IECEx, BV, CE Marking, FM 6310, 6320 and CSA 22.2 No. 152-M1984...