# US 2024/0201155 A1 · Device for the Detection of Conditions Indicative of Illicit Drug Production > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201155 A1 - Document ID: US20240201155A1 - Status: Published application - Kind: A1 - Application number: 18/591,824 - Filed: 2024-02-29 - Published: 2024-06-20 - Earliest claimed: 2016-12-22 - Assignees: P Alert Limited - Applicants: P Alert Limited - Inventors: Robert David Beck; James Hanson; Bharath Bhaskar Atreya; Ashwath Maiya - Web page: https://patentgrep.com/patent/US20240201155A1 ## CPC - G01N 33/0047: {Organic compounds} - G01N 33/0059: {Avoiding interference of a gas with the gas to be measured} - G01N 33/0063: {using a threshold to release an alarm or displaying means} - 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) ## Abstract Devices and methods for the detection of conditions indicative of production and/or use of methamphetamine hydrochloride are disclosed. The device comprises a self-contained power source, and an airborne sensor configured to output a signal indicative of the presence of methamphetamine hydrochloride. At least one processor is configured to maintain the device in a low power sleep mode until a predetermined time condition is met. On the time condition being met, the airborne sensor is preheated for a first period of time and the signal output by the airborne sensor is monitored. On determining that the signal output by the airborne sensor meets a predetermined threshold the airborne sensor is preheated for a second period of time, wherein the second period of time is longer than the first period of time, on determining that the signal output by the airborne sensor meets the predetermined threshold following the preheating for the second period of time, an alert is transmitted to a remote location. ## Claims ### Claim 1 A device for the detection of conditions indicative of production and/or use of methamphetamine hydrochloride, comprising: a self-contained power source; an airborne sensor configured to output a signal indicative of the presence of methamphetamine hydrochloride; at least one processor, configured to: maintain the device in a low power sleep mode until a predetermined time condition is met; preheat the airborne sensor for a first period of time and monitor the signal output by the airborne sensor; preheat the airborne sensor for a second period of time on determining that the signal output by the airborne sensor meets a predetermined threshold, wherein the second period of time is longer than the first period of time, and monitor the signal output by the airborne sensor; and on determining that the signal output by the airborne sensor meets the predetermined threshold following the preheating for the second period of time, transmit an alert to a remote location. ### Claim 2 (depends on 1) The device of claim 1, wherein the airborne sensor comprises a semiconductor type airborne sensor. ### Claim 3 (depends on 2) The device of claim 2, wherein the ethanol gas sensor is a metal oxide type airborne sensor. ### Claim 4 (depends on 1) The device of claim 1, wherein the first period of time is between about 5 seconds and about 10 seconds. ### Claim 5 (depends on 1) The device of claim 1, wherein the first period of time is about 6 seconds. ### Claim 6 (depends on 1) The device of claim 1, wherein the second period of time is greater than about 10 seconds. ### Claim 7 (depends on 1) The device of claim 1, wherein the second period of time is about 20 seconds. ### Claim 8 (depends on 1) The device of claim 1, wherein the processor is configured to perform an installation heating of the airborne sensor for a period of time greater than two minutes and less than 5 minutes. ### Claim 9 (depends on 1) The device of claim 1, comprising at least one interference sensor configured to output a signal indicative of physical interference with the device, wherein the at least one processor is configured to interrupt the low power sleep mode on receiving a signal indicative of physical interference with the device from the at least one interference sensor. ### Claim 10 (depends on 1) The device of claim 1, wherein the device comprises a wireless modem configured to communicate over a cellular network. ### Claim 11 (depends on 10) The device of claim 10, wherein the device comprises a multi-carrier SIM, and the at least one processor is configured to perform dynamic identification and locking of a designated cellular network. ### Claim 12 (depends on 1) The device of claim 1, wherein the processor is configured to listen for command messages once the predetermined time condition is met. ### Claim 13 (depends on 1) A system for the monitoring and reporting of conditions indicative of production and/or use of methamphetamine hydrochloride, comprising: the device of claim 1; and a remote computing resource configured to be in communication with the device, wherein the remote computing resource is further configured to deliver alert messages, and/or enable access to a user interface displaying historical information relating to operation of the device, to at least one user. ### Claim 14 A method for the detection of conditions indicative of production and/or use of methamphetamine hydrochloride, comprising: maintaining a device comprising a self-contained power source and an airborne sensor configured to output a signal indicative of the presence of methamphetamine hydrochloride in a low power sleep mode until a predetermined time condition is met a self-contained power source; preheating the airborne sensor for a first period of time and monitoring the signal output by the airborne sensor; preheating the airborne sensor for a second period of time on determining that the signal output by the airborne sensor meets a predetermined threshold, wherein the second period of time is longer than the first period of time, and monitoring the signal output by the airborne sensor transmitting an alert to a remote location on determining that the signal output by the airborne sensor meets the predetermined threshold following the preheating for the second period of time. ### Claim 15 (depends on 14) The method of claim 14, wherein the first period of time is between about 5 seconds and about 10 seconds. ### Claim 16 (depends on 14) The method of claim 14, wherein the first period of time is about 6 seconds. ### Claim 17 (depends on 14) The method of claim 14, wherein the second period of time is greater than about 10 seconds. ### Claim 18 (depends on 14) The method of claim 14, wherein the second period of time is about 20 seconds.