Pulse Oxygene Meter (POM) devices are popular for measuring CO2 levels in outdoor air.
The device can read levels up to a certain point, then take a reading based on what you breathe in.
But a recent survey conducted by the Environmental Protection Agency found that many people aren’t using them.
“Pulse Oxygen meters are often used in residential settings, particularly by people who work in the workplace,” the EPA said.
They have “the potential to detect CO2 pollution from sources other than the workplace.
For example, indoor air pollution, industrial pollution, and noise may be sources of CO2 exposure.”
So if you live in an urban area, it’s not worth using one.
You may be exposed to more CO2 than you’re willing to admit.
POMs can measure up to 4,000 parts per million (ppm) of CO 2 , but the EPA has determined that the device “should be used with caution in outdoor environments.”
And if you’re working outdoors, there’s an increased chance of you inhaling more CO 2 than the device can accurately measure.
The EPA estimates that, if you work in an office or office building, you’re exposed to about a million ppm of CO² each year.
The meter won’t tell you exactly how much CO2 you’re breathing.
“There is no way to tell how much pollution is coming from a given indoor source, especially since the device does not have a mechanism for measuring atmospheric concentrations of CO, carbon dioxide, or other greenhouse gases,” the Environmental Protect Agency says.
So the POM is best used as a “tool to measure indoor CO2 concentrations,” the agency added.
And since you don’t know the exact amount of CO from an outdoor source, you won’t be able to use it to help reduce CO2 emissions.
PEMs work best indoors.
They can’t tell whether CO2 is coming directly from the outdoors, but they can tell how the air is going.
Poms cost about $150.
But the EPA says that “they may be more expensive than the equipment used to measure CO2 in the first place.”
The EPA warns that “the POM may not be able or willing to provide accurate measurements of indoor CO 2 concentrations in a given time frame or environment.”
They’ll cost you more money to replace.
“As a result, many people choose not to install one,” the American Chemistry Council says.
The organization says that most POM users “would be able, if needed, to purchase a PEM device from a manufacturer that has an approved CO2 meter that measures CO2 at a level that will not exceed the EPA standard,” but it adds that “no such device exists.”
If you’re buying one, “you will be purchasing a device that will be subject to the requirements of the EPA, the Federal Aviation Administration, and the Federal Highway Administration.”
You’re more likely to need a respirator.
POMEVs “are not appropriate for outdoor use,” the FAA says.
They may “not be reliable and will not provide accurate information to detect indoor CO emission.”
And even if you do have one, you might want to avoid it “if possible.”
The FAA recommends that people “do not use POM meters indoors.”
“In areas where there are high concentrations of indoor pollution, the POMEV may be insufficient to provide meaningful information,” the organization says.
They don’t work well with your asthma inhaler.
“The POM does not provide a reliable means to detect the presence of CO₂, and in some cases, it may be difficult to determine if a given individual is using COℓ,” the Air Force says.
“Therefore, POM units are not appropriate to use to detect outdoor CO⁂ or other pollutants.”
You can’t make any adjustments to the Pomev, because it has an unreliable meter.
“Because the PEM is a gas analyzer, it does not produce a reading of CO ₂ or CO⋅,” the US Department of Transportation says.
It “can only provide an indication of CO³,” the Department of Homeland Security says.
They require special tools.
The POM uses a mechanical arm and an electrical cable to measure the concentration of CO.
You’ll need to “attach and detach the PME from the PPM unit,” the Transportation Department says.
But “it is not a portable device,” the TSA warns.
“It does not fit into your pocket or carry case.”
The TSA warns that it “may be necessary to install an additional POM unit in order to provide the same information.”
The Environmental Protection Administration’s website warns that the Pom is “not recommended for outdoor outdoor use” because it “can not be used in a residential setting.”
And the EPA warns against using it indoors. But you