Entry: TEOM
URI: https://terra-vocabulary.org/ncl/FAIR-Incubator/earthsciencesensors/c_a105eaca
In the Tapered Element Oscillating Microbalance (TEOM), the air is sucked in through the sampling head which restricts the size of the particle entering the device (for instance a PM10 sampling head will only allow particles with a diameter less than or equal to 10 micro-meters). Some of the air then passes through the filter within the tapered element oscillating microbalance and as the number of particles deposited increases the natural frequency of the vibration of the element decreases. There is therefore a direct relationship between the change in the vibrating frequency and the mass on the filter. The TEOM measures the mass of the particles and allows 15-minute average readings, which is very useful for tracking pollution incidents as it allows real time analysis. However, it tends to under-read the particle levels monitored compared with the Partisol Plus Unit as it is heated to prevent water entering the device, and therefore many of the volatile particles are evaporated.
Core metadata
| is a | Concept | Sensor |
| changed on | 1 Dec 2023 10:43:54.320 |
| submitted by | Viqui Agazzi |
| accepted on | 29 Sep 2022 09:14:26.539 |
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All metadata properties
| date accepted |
29 Sep 2022 09:14:26.539
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| date submitted |
29 Sep 2022 09:11:15.000
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| definition |
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| item class |
Sensor
| Concept
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| label |
TEOM
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| modified |
1 Dec 2023 10:43:54.320
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| notation |
c_a105eaca
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| register |
earthsciencesensors
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| status |
status experimental
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| submitter |
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| type |
register item
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| version info |
3
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Definition
| alt label |
Tapered Element Oscillating Microbalance
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| broader |
Gauges
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| definition |
In the Tapered Element Oscillating Microbalance (TEOM), the air is sucked in through the sampling head which restricts the size of the particle entering the device (for instance a PM10 sampling head will only allow particles with a diameter less than or equal to 10 micro-meters). Some of the air then passes through the filter within the tapered element oscillating microbalance and as the number of particles deposited increases the natural frequency of the vibration of the element decreases. There is therefore a direct relationship between the change in the vibrating frequency and the mass on the filter. The TEOM measures the mass of the particles and allows 15-minute average readings, which is very useful for tracking pollution incidents as it allows real time analysis. However, it tends to under-read the particle levels monitored compared with the Partisol Plus Unit as it is heated to prevent water entering the device, and therefore many of the volatile particles are evaporated.
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| exact match |
820dddd3 7235 11ae 6c85 713f9edb7724
| 5443ac3e 5066 4a89 a973 93b345c91947
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| label |
TEOM
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| pref label |
TEOM
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| type |
Concept
| Sensor
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