Title:
【発明の名称】質量流量を測定する方法およびセンサ
Document Type and Number:
Japanese Patent JP2002533663
Kind Code:
A
Abstract:
A heating element (4) is arranged between two temperature sensors (5, 6) in order to measure the mass flow of a liquid or a gas. The mass flow is determined from the temperature difference of the temperature sensors (5, 6). The heating element (4) is operated by pulses in order to reduce power consumption of the device. A further reduction of the power consumption is reached by means of a monitoring circuit (12), which switches the actual measuring section (11) on only if the signals from the temperature sensors (5, 6) fulfil a threshold condition.
Inventors:
Meyer, Felix
Lechner, Moritz
Lechner, Moritz
Application Number:
JP2000589907A
Publication Date:
October 08, 2002
Filing Date:
December 08, 1999
Export Citation:
Assignee:
Zenzilion Actien Gezel Shaft
International Classes:
G01F1/696; G01F1/698; (IPC1-7): G01F1/696
Domestic Patent References:
| JPH08136566A | 1996-05-31 | |||
| JPH08278323A | 1996-10-22 | |||
| JPH04339218A | 1992-11-26 |
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)