Universal sample probes handle the most demanding CEMS, process and flare gas applications. We provide solutions for straight extractive and dilution systems including applications with high velocity, high temperature and high dust loading. We also provide integrated ammonia converter and scrubber options for NOxdifferential methodologies commonly used to measure ammonia slip. An integrated blow back system with accumulator tanks and solenoid valve reduce the likelihood of plugged filters while the heated no tool chamber makes changing the filter easy when needed. Our sub-flange assembly allows everything in the flow path, including the probe tube and probe tip filter, to be maintained without removing the enclosure. Universal sample probes are engineered to maximize uptime and make maintenance easy when necessary.