The device uses internal optical filters to perform automated zero and span tracking.
The 880-NSL is specifically designed for continuous monitoring in a variety of sulfur recovery units, including: ametek 880-nsl user manual pdf
Achieved automatically at programmed hourly cycles using clean instrument air ( ). This action resets zero drift to less than every 24 hours. The device uses internal optical filters to perform
515 to 690 kPa (75 to 100 psig) for optional ball valve jackets. ametek 880-nsl user manual pdf