GAS DETECTION DEVICE FOR GASEOUS COMPOUND
A gas detection device comprising a membrane filter disposed between an electrochemical sensor and an environment exterior to the gas detection device.
1 . A gas detection device comprising a membrane filter disposed between an electrochemical sensor or a semiconductor metal oxide and an environment exterior to the gas detection device.
2 . The gas detection device of claim 1 , wherein the electrochemical sensor comprises a membrane electrode assembly.
3 . The gas detective device of claim 2 , wherein the gas detection device has an evaporation rate less than a gas detection device having an adsorbent disposed between an electrochemical sensor and an environment exterior to the gas detection device.
4 . The gas detection device of claim 1 , wherein the membrane filter comprises a molecular sieve, a polymer, or a combination thereof.
5 . The gas detection device of claim 4 , wherein the molecular sieve comprises zeolites, metal organic frameworks, engineered activated carbon, clay, and combinations thereof.
6 . The gas detection device of claim 4 , wherein the polymer has a selectivity greater than or equal to 25:1 for a target compound and the gas detection device is capable of detecting the target compound.
7 . The gas detection device of claim 4 , wherein the membrane filter comprises a combination of a molecular sieve and a polymer.
8 . The gas detection device of claim 1 , wherein the membrane filter has a thickness of 10 to 5000 micrometers.
9 . A method of protecting a sensor comprising disposing a membrane filter between the sensor and an exterior environment wherein the sensor comprises an electrochemical sensor or a semiconductor metal oxide.
10 . The method of claim 9 , wherein the electrochemical sensor comprises a membrane electrode assembly.
11 . The method of claim 9 , wherein the membrane filter comprises a molecular sieve, a polymer, or a combination thereof.
12 . The method of claim 11 , wherein the molecular sieve comprises zeolites, metal organic frameworks, engineered activated carbon, clay, and combinations thereof.
13 . The method of claim 11 , wherein the polymer has a selectivity greater than or equal to 25:1 for a target compound and the sensor is capable of detecting the target compound.
14 . The method of claim 11 , wherein the membrane filter comprises a combination of a molecular sieve and a polymer.
15 . The method of claim 9 , wherein the membrane filter has a thickness of 10 to 5000 micrometers.
16 . A method of detecting a gaseous compound in an environment comprising exposing a gas detection device to the environment wherein the gas detection device comprises an electrochemical sensor or a semiconductor metal oxide sensor and a membrane filter disposed between the electrochemical sensor or the semiconductor metal oxide sensor and the environment; and detecting the gaseous compound with the gas detection device.
17 . The method of claim 16 , wherein the electrochemical sensor comprises a membrane electrode assembly.
18 . The method of claim 16 , wherein the membrane filter comprises a molecular sieve, a polymer, or a combination thereof.
19 . The method of claim 18 , wherein the molecular sieve comprises zeolites, metal organic frameworks, engineered activated carbon, clay, and combinations thereof.
20 . The method of claim 18 , wherein the polymer has a selectivity greater than or equal to 25:1 for a target compound and the gas detection device is capable of detecting the target compound.
21 . The method of claim 16 , wherein the membrane filter has a thickness of 10 to 5000 micrometers.