# US 2016/0258918 A1 · Environmental monitoring system and method with a prefilter

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2016/0258918 A1
- Document ID: US20160258918A1
- Status: Published application
- Kind: A1
- Application number: 15/158,315
- Filed: 2016-05-18
- Published: 2016-09-08
- Earliest claimed: 2009-12-31
- Applicants: Emilcott Associates, Inc.
- Inventors: Bruce D. Groves
- Web page: https://patentgrep.com/patent/US20160258918A1

## CPC

- G01N 33/0047: {Organic compounds}
- G01N 1/2205: {with filters}
- G01N 27/66: and measuring current or voltage
- Y10T 436/196666: Carbon containing compound [e.g., vinylchloride, etc.]
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Various environmental systems are disclosed. In accordance with one of the systems, a first and second valve are provided. The valves provide a first air flow path from an air pump to a photo-ionization detector is provided through a pre-filter. The valves also provide a second air flow path from the air pump to the photo-ionization detector so that the pre-filter is isolated from its environmental surroundings. Various other arrangements of environmental monitoring systems with one or more pre-filters are also disclosed.

## Claims

### Claim at position 1

-12. (canceled)

### Claim 13

An environmental monitoring system, comprising
a first air pump connected to a first detector, the first detector determining a concentration of one or more volatile organic compounds in real-time;
a second air pump connected to a second detector, the second detector connected to a first check valve that is connected to a pre-filter that is connected to a second valve, the second detector determining a concentration of one or more volatile organic compounds in real-time;
wherein the first detector is co-located with the second detector.

### Claim 14 (depends on 13)

The system of claim 13, wherein the first detector is a photo ionization detector.

### Claim 15 (depends on 14)

The system of claim 14, wherein the second detector is a photo ionization detector.

### Claim 16 (depends on 13)

The system of claim 13, wherein the first detector is selected from the group consisting of a photo ionization detector, a flame ionization detector, a spectrophotometer and an electrochemical detector.

### Claim 17 (depends on 16)

The system of claim 16, wherein the second detector is selected from the group consisting of photo ionization detector, a flame ionization detector, a spectrophotometer and an electrochemical detector.

### Claim 18 (depends on 13)

The system of claim 13, wherein the first valve and the second valves are controlled by a computerized environmental monitoring system.