# US 2014/0150561 A1 · Oxygen system having sensors with a passive rfd interface

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- Number: US 2014/0150561 A1
- Document ID: US20140150561A1
- Status: Published application
- Kind: A1
- Application number: 14/041,752
- Filed: 2013-09-30
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: B/E Aerospace, Inc.
- Applicants: B/E Aerospace, Inc.
- Inventors: Chad Richardson; Wayne Noehren
- Web page: https://patentgrep.com/patent/US20140150561A1

## CPC

- G01L 9/00: Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements {(G01L11/004 takes precedence)}; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means (measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00)
- G01L 19/086: {for remote indication}
- G01L 19/143: {Two part housings}
- G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)

## Abstract

A passively powered gas sensor for remotely reading and transmitting a gas pressure of a system, comprising a hollow cylindrical body, a stem axially aligned and extending outwardly from a first surface of the hollow cylindrical body, a pressure sensing element in the stem, and an antenna coupled to the pressure sensing element, where the antenna is located within the hollow cylindrical body and the stem. The pressure sensing device is polled remotely by a polling device, and powered by the polling device.

## Claims

### Claim 1

A passively powered gas sensor for remotely reading and transmitting a gas pressure of a system, comprising:
a hollow cylindrical body;
a stem axially aligned and extending outwardly from a first surface of the hollow cylindrical body, the stem having an interior surface and a threaded exterior surface;
a pressure sensing element in the stem;
an antenna coupled to the pressure sensing element, where the antenna is located within the hollow cylindrical body and the stem; and
wherein the pressure sensing device is polled remotely by a polling device, and powered by the polling device.

### Claim 2 (depends on 1)

The passively powered gas sensor of claim 1 wherein the cylindrical body has a hexagonal profile.

### Claim 3 (depends on 1)

The passively powered gas sensor of claim 1, wherein the polling device powers the sensor with RF energy.

### Claim 4 (depends on 1)

The passively powered gas sensor of claim 1, further comprising a printed circuit board that carries the pressure sensing element.

### Claim 5 (depends on 1)

The passively powered gas sensor of claim 1, wherein the hollow cylindrical body is filled with encapsulating material.

### Claim 6 (depends on 1)

The passively powered gas sensor of claim 1, wherein the sensor can read pressures up to 2900 psi.

### Claim 7 (depends on 1)

The passively powered gas sensor of claim 1, wherein the sensor can read flow rates up to 600 lpm.

### Claim 8 (depends on 1)

The passively powered gas sensor of claim 1, further including a self-contained back-up power supply.