| 摘要 |
At the place of measurement in the duct is a throttling flange (5), or a venturi nozzle, and a separate measuring duct (9, 10, 13) is connected through outlets arranged upstream and downstream of the throttling flange to divert a partial gas flow through the measuring duct. A temperature sensitive, flow sensing resistor (14) is attached to a measuring cell (13) in the measuring duct and heated electrically, preferably at a constant current. The voltage drop across this resistor (14) constitute the electrical measuring output signal. Throttling arrangements (11, 12) in the measuring duct ensure a laminar flow through the measuring cell (13). A temperature compensating resistor can be provided. <IMAGE> |
