Thermal heat flux measurement device for flow rate measurement has a flow rate adjustment stage comprising an array of resistances and fuses, where the fuses are burnt out to set the correct operating range.

摘要

Device comprises an adjustment stage (100) for adjustment of flow rate measurement properties which comprises a serial connection of fixed resistances (1-4) and parallel fuses (5- 8). An alternative involves a parallel array of resistance and fuse branches. When a flow is measured the fuses are burnt out so that the measurement resistance is adjusted.