The entry level oxygen (O2) headspace analyser Pac Check Model 450EC is designed for companies who are displacing residual oxygen in their packaging headspace with nitrogen or other gas flushing. The costeffective device provides a fast and accurate way to determine exactly how much residual oxygen has been left in the package. A simplified menu structure lets users go from set-up to test in less than a minute, making it extremely fast and easy to operate. It can measure an O2 concentration range from 0 to 100% in package types ranging from small blisters to large pouches. Applications include a variety of gasflushed products such as case-ready meats, cheese, prepared foods and snacks, as well as certain pharmaceuticals. Additionally, the unit is suited for form-fill-seal OEM packaging equipment manufacturers who market modified atmosphere gas flushing capability, as well as gas inerting OEM equipment manufacturers. Its small footprint adds to its versatility s0 it can be easily incorporated into existing operations. The sensor can be replaced by plant personnel in less than 10 minutes.