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A fluidic oscillator can include a fluid switch, at least two fluid paths from the fluid switch, and a sensor which measures a frequency of fluctuations in flow through the fluidic oscillator. A method of measuring a flow rate of a fluid can include flowing the fluid through a fluidic oscillator, a

A fluidic oscillator can include a fluid switch, at least two fluid paths from the fluid switch, and a sensor which measures a frequency of fluctuations in flow through the fluidic oscillator. A method of measuring a flow rate of a fluid can include flowing the fluid through a fluidic oscillator, a majority of the fluid flowing alternately via at least two fluid paths from a fluid switch of the fluidic oscillator, and a sensor detecting a frequency of the flow alternating between the fluid paths. Another fluidic oscillator can include a fluid input, at least two fluid paths from the fluid input to respective fluid outputs, whereby a majority of fluid which flows through the fluidic oscillator flows alternately via the fluid paths, and a sensor which detects pressure fluctuations due to the flow alternating between the fluid paths.

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1. A fluidic oscillator, comprising: at least one fluid switch;multiple fluid paths from the fluid switch to respective fluid outputs; anda sensor which detects a frequency of fluctuations in flow through the fluidic oscillator, wherein the fluid paths cross each other between the fluid switch and t

1. A fluidic oscillator, comprising: at least one fluid switch;multiple fluid paths from the fluid switch to respective fluid outputs; anda sensor which detects a frequency of fluctuations in flow through the fluidic oscillator, wherein the fluid paths cross each other between the fluid switch and the respective fluid outputs. 2. The fluidic oscillator of claim 1, wherein the sensor detects the frequency of the flow which alternates between the fluid paths. 3. The fluidic oscillator of claim 1, wherein a majority of a fluid flows alternately via the fluid paths to the respective fluid outputs. 4. The fluidic oscillator of claim 1, wherein the fluid switch is at an intersection of the fluid paths with an input of the fluidic oscillator. 5. The fluidic oscillator of claim 1, wherein the sensor comprises a pressure sensor. 6. The fluidic oscillator of claim 1, wherein the sensor detects pressure fluctuations due to the flow alternating between the fluid paths. 7. The fluidic oscillator of claim 6, wherein the sensor detects two pressure pulses for each cycle of the flow alternating between the fluid paths. 8. The fluidic oscillator of claim 1, wherein the sensor is in communication with a chamber having an inlet positioned between the fluid paths. 9. The fluidic oscillator of claim 8, wherein the inlet is directly impinged by flow from the fluid switch. 10. The fluidic oscillator of claim 1, wherein a flow rate of fluid through the fluidic oscillator is indicated by the frequency of the fluctuations in flow. 11. The fluidic oscillator of claim 1, wherein the frequency of the fluctuations in flow varies in response to changes in flow rate through the fluidic oscillator. 12. The fluidic oscillator of claim 1, wherein the sensor detects pressure at a location between the fluid paths. 13. The fluidic oscillator of claim 1, wherein the sensor comprises an optical sensor. 14. The fluidic oscillator of claim 1, wherein the sensor comprises a strain sensor. 15. A method of measuring a flow rate of a fluid, the method comprising: flowing the fluid through a fluidic oscillator, a majority of the fluid flowing alternately via multiple fluid paths from a fluid switch of the fluidic oscillator to respective fluid outputs; anddetecting a frequency of flow alternating between the fluid paths, the fluid paths crossing each other between the fluid switch and the respective fluid outputs. 16. The method of claim 15, wherein the majority of the fluid flows alternately via the fluid paths to respective fluid outputs. 17. The method of claim 15, wherein the fluid switch is at an intersection of the fluid paths with an input of the fluidic oscillator. 18. The method of claim 15, wherein the frequency of the alternating flow between the fluid paths is detected by a sensor. 19. The method of claim 18, wherein the sensor comprises a pressure sensor. 20. The method of claim 18, wherein the sensor detects pressure fluctuations due to the flow alternating between the fluid paths. 21. The method of claim 18, wherein the sensor is in communication with a chamber having an inlet positioned between the fluid paths. 22. The method of claim 21, wherein the inlet is directly impinged by the flow from the fluid switch. 23. The method of claim 15, wherein a flow rate of the fluid through the fluidic oscillator is indicated by the frequency of the alternating flow between the fluid paths. 24. The method of claim 15, wherein the frequency of the alternating flow between the fluid paths varies in response to changes in flow rate of the fluid through the fluidic oscillator. 25. The method of claim 15, wherein the frequency of the alternating flow between the fluid paths is detected at a location between the fluid paths. 26. The method of claim 18, wherein the sensor comprises an optical sensor. 27. The method of claim 18, wherein the sensor detects pressure pulses at twice the frequency of the flow alternating between the fluid paths. 28. The method of claim 18, wherein the sensor detects strain in a component of the fluidic oscillator. 29. A fluidic oscillator, comprising: at least one fluid switch;multiple fluid paths from the fluid switch to respective fluid outputs, whereby a majority of fluid which flows through the fluidic oscillator flows alternately via the fluid paths, the fluid paths crossing each other between the fluid switch and the respective fluid outputs; anda sensor which detects pressure fluctuations due to the flow alternating between the fluid paths. 30. The fluidic oscillator of claim 29, wherein the sensor is in communication with a chamber having an inlet positioned between two of the fluid paths. 31. The fluidic oscillator of claim 29, wherein a flow rate of the fluid through the fluidic oscillator is indicated by a frequency of the flow alternating between the fluid paths. 32. The fluidic oscillator of claim 29, wherein the fluid switch is at an intersection of the fluid paths with an input of the fluidic oscillator. 33. The fluidic oscillator of claim 29, wherein a frequency of the flow alternating between the fluid paths varies in response to changes in flow rate of the fluid through the fluidic oscillator. 34. The fluidic oscillator of claim 29, wherein the sensor senses pressure at a location between the fluid paths. 35. The fluidic oscillator of claim 29, wherein the sensor comprises an optical sensor. 36. The fluidic oscillator of claim 29, wherein the sensor measures pressure in a chamber which is directly impinged by flow from the fluid input. 37. The fluidic oscillator of claim 29, wherein the sensor detects the pressure fluctuations at twice the frequency of the flow alternating between the fluid paths. 38. The fluidic oscillator of claim 29, wherein the sensor comprises a strain sensor.