Fluid analyzer
AssigneeSiemens Aktiengesellschaft
InventorGlen Eugene Schmidt
Life of this patent
Estimating the term…
Abstract
A fluid analyzer having an electrical heater includes an intrinsic safety barrier that provides voltage and current from a power source to an electrical load and includes a voltage limiter and an infallible current limiting resistor for limiting the voltage and current provided to respective intrinsically safe levels, where the voltage limiter is arranged in a flameproof/explosion proof or pressurized/purged enclosure, and the current limiting resistor, e.g., an electrical heater, is connected via a connecting line to the voltage limiter and arranged outside the flameproof/explosion proof or pressurized/purged enclosure in an enclosure configured to provide protection against contact and ingress without being flameproof/explosion proof or pressurized/purged.
Claims18
A fluid analyzer comprising:
- a fluid analysis section configured to receive a fluid and to measure at least one of a physical and chemical property of said fluid, the fluid analysis section being equipped with an electrical heater;
- an electronics section configured to at least one of control the fluid analysis section and process measurement values delivered by the fluid analysis section to generate analytical measuring data based thereon;
- and
- an intrinsic safety barrier configured to provide voltage and current from a power source to an electrical load, said intrinsic safety barrier comprising a voltage limiter and an infallible current limiting resistor for limiting the voltage and current provided to respective intrinsically safe levels;
- wherein the voltage limiter is arranged in one of a flameproof/explosion proof and pressurized/purged enclosure;
- wherein the current limiting resistor is connected via a connecting line to the voltage limiter and arranged outside one of the flameproof/explosion proof and the pressurized/purged enclosure in an enclosure established to provide protection against ingress without being one of flameproof/explosion proof and pressurized/purged;
- and
- wherein the current limiting resistor forms a further electrical heater.
Dependencies are inferred from the claim text.