Patent ID: 7891256
Filing Date: 2011-02-22
Classification: G01F

Abstract:
1. A differential-pressure flow meter having a pair of pressure-sensing devices fixed to a base member on upstream and downstream sides of an orifice member along a flow channel to determine a flow rate based on a pressure difference measured between the two sides of the orifice member by the pressure-sensing devices, the differential-pressure flow meter comprising: specific control boards disposed near pressure-sensing parts installed in the respective pressure-sensing devices, wherein the specific control boards provide control function separately for the pressure-sensing devices, and a main control board disposed in a board installation space formed inside the base member, wherein the main control board at least provides some control function common to the pressure-sensing devices, the specific control boards being connected to the main control board with wires passing through a plurality of wiring circuits provided in housings of the pressure-sensing devices, external wiring being connected to one of the specific control boards or to the main control board.