Patent ID: 11919009
Assignee: ADEY HOLDINGS (2008) LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  C  G | IPC B  C  G

Claim 0:
1. A captured debris level measuring device for a magnetic filter in a central heating system, the captured debris measuring device comprising:
a magnetometer for mounting to the magnetic filter to measure a magnetic field strength due to a magnet and any captured magnetic debris;
a temperature sensor for mounting to the magnetic filter; and
a control unit, the magnetometer and temperature sensor being connected to inputs of the control unit, and output means being provided adapted to issue a notification based on a combination of the magnetometer reading and the temperature sensor reading to provide an indication when the amount of debris captured within the filter exceeds a threshold level,
the control unit being adapted to use a reading from the temperature sensor in making a determination as to the amount of magnetic debris captured only when the temperature sensor reading has not changed by more than a predetermined temperature for a predetermined time.