Flow restrictor used to connect a BCD hose to a DE-OX sensor. This accessory is used to reduce the gas pressure to ambient pressure, avoiding damage to the sensor. It gives a flow of approx. 1 lit/min. 
 
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Do not connect a wet BC hose to the flow restrictor for avoiding salt crystal building.

DE-OX BCD Hose Flow Restrictor for direct sensor connection

Flow restrictor used to connect a BCD hose to a DE-OX sensor. This accessory is used to reduce the gas pressure to ambient pressure, avoiding damage to the sensor. It gives a flow of approx. 1 lit/min.