BE-140 AD-Five-Gas Bench

     Simultaneously measures CO, unburned HC (as n-hexane), and CO₂ in automotive exhaust, using NDIR technology. Highly reliable with a long service life, BE-140 AD is certified for the three-gas portion of BAR-97 when incorporated into an exhaust-gas analysis system with sampling and control functions. Consists of solid-state infrared detectors, a microprocessor, and miniature echanical components in a compact package. An optional galvanic cell measures O₂. The unit can be wired for NO measurements, using either BE-220 or a electrochemical sensor. The microprocessor provides fully calibrated gas concentration values with compensation for atmospheric-pressure  changes. Concentrations are output via RS-232C.

FEATURES

Adjusts gain control for the detector signals. Performs automatic zero and electrical calibration without standard gases or mechanical checkers. Reads span-gas data, computes a correction factor for each gas, and stores the factors in EEPROM. Informs the user of alarms and self-checks. Field-proven, accurate, and very reliable, BE-140 AD is the heart of Horiba's MEXA-324 J/554 J Series portable analyzers as well as many third-party analyzers. Simultaneously measures up to three components - CO, HC and CO₂ - with minimum interference from coexisting gases. Includes options for O₂ and NO measurement. 6 analog inputs and 8 digital input/outputs are freely definable by customer. Solid-state, dual infrared detectors automatically compensate for common-mode temperature effects. Integrated field-effects transistor (FET) minimizes noise. Requires no optical adjustment. 5-minute warm-up time.

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