Patent ID: 11965807
Assignee: SENSIRION AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A duct probe for sampling a fluid from a main fluid flow in a duct,
the duct probe defining comprising an elongated supply channel and an elongated discharge channel, the supply channel and the discharge channel extending substantially along a longitudinal axis of the duct probe,
each of the supply channel and the discharge channel having a closed end and an open end, the open end configured for direct or indirect connection to an environmental sensor,
the supply channel having at least one inflow opening for diverting a partial flow from the main fluid flow into the supply channel, and the discharge channel having at least one outflow opening for returning the partial flow from the discharge channel into the main fluid flow after it has passed the environmental sensor,
the duct probe further comprising at least one compensation channel that connects the supply channel and the discharge channel in a region that is located between the closed ends and the open ends of the supply channel and the discharge channel, respectively, in order to reduce a pressure difference between the supply channel and the discharge channel when the duct probe is exposed to a main fluid flow,
wherein the inflow opening and the compensation channel are arranged and sized to cause a jet flow through the inflow opening, the jet flow being directed towards the compensation channel and being decelerated when it passes through the compensation channel.