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US 2009/0215180 A1Published application
Electronic chemical trace detector
AssigneeConsultatie Implementatie Technisch Beheer B.V.
InventorAlbert Bos
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AssigneeConsultatie Implementatie Technisch Beheer B.V.
InventorAlbert Bos
Estimating the term…
A hotplate chemical trace detector comprising a heatable conducting plate with a heater element having a predetermined temperature-power characteristic. A balancing circuit comprises an adjustable resistor for tuning the heater element to a predefined resistor value. A processor is provided for adjusting the adjustable resistor so as to provide a stabilized temperature in said heatable conducting plate and a detection circuit is provided for detecting a change of resistance in the heatable conducting plate in accordance with the presence of a chemical trace reacting in the presence of the conducting plate. According to the invention a test circuit is provided for measuring a dissipated power in the heater element and for calculating a real temperature from the dissipated power in the heater element based on the predetermined temperature-power characteristic.
A hotplate chemical trace detector comprising:
A hotplate chemical trace detector wherein the heatable conducting plate comprises a MOS sensor.
A method of calibrating a hotplate chemical trace detector comprising a heater plate tunable by an adjustable resistor, comprising:
A method of identifying a chemical substance on a hotplate sensor comprising a adjustable resistance of a heater element heater element having predetermined temperature-power relationship comprising;
Dependencies are inferred from the claim text.