270/NH3 gas sample probe and ammonia converter

The 270/NH3 gas sample probe and ammonia converter provides both a converted and an unconverted sample stream. This provides a way to measure the ammonia slip that is normally found at the exit of a selective catalytic reduction (SCR) unit using the dual NOx differential method. By combining the sample probe and ammonia converter, a single unit provides both filtration and conversion at the source of measurement. The device comes with an aggressive blowback (filter purging) and a calibration-gas inlet port for compliance with U.S. Environmental Protection Agency regulations. Proper temperatures are maintained to prevent cold spots and loss of ammonia during conversion. A separate ammonia converter is also available for use with an existing sample probe.