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Do not base your order on the picture presented.
Features of the Philips OxiCheck Analyzer:
The Criterion OxiCheck is a compact analyzer designed to spot check oxygen concentration.
Connected in seconds directly to the 22mm output connector of a Whisperflow Generator or most ventilators, OxiCheck can be used to confirm the FiO2 output being delivered to a patient quickly and accurately.
The OxiCheck is portable and can be carried in your pocket, ideal where a quick check of oxygen delivery is required.
Simple to use and calibrate, the OxiCheck also preserves battery life by automatically switching off after 90 seconds. The device lasts for 12 months and requires no maintenance.