Model 300 is designed to measure a single gas. The Model 300 optical bench consists of the IR source, sample cell, and patent pending detector. The source control circuit provides a controlled current square wave to the infrared source. No mechanical chopper is used so there are no moving parts in the Model 300 optical bench that wear out or require adjustment. Infrared energy from the source passes through the sample where energy at specific wavelengths is absorbed by the sample. The closed sample path eliminates interfering absorption from ambient air. The energy not absorbed in the sample cell reaches the detector which is sensitive to the wavelengths attenuated by the gas of interest. The patent pending Model 300 detector consists of two chambers in optical series with a very sensitive transducer to measure the relative energy absorbed by each chamber. The primary difference between the Model 300 detector and other NDIR detectors is that these two signals from the primary and secondary chamber are balanced. The balancing process greatly improves the sensitivity and selectivity for the gas of interest.

Applications

• Stack gas monitoring
• Continuous emission monitoring
• Monitoring of: boilers, incinerators, furnaces

Standard Specifications

Operating Requirements