Know your Atmocube

Sensors and Ranges

Here you can find information about the Atmocube built-in sensors and their respective ranges.

CO2

Carbon dioxide, CO2, is an odorless non-toxic gas. People exhale CO2 when they breathe, so if there are several people in a poorly ventilated room, its concentration increases and this affects occupants’ wellbeing. This is the reason why this parameter is important in terms of indoor air quality.

In indoor spaces, safe standards for CO2 concentrations are 400-1000 ppm (parts per million).

In-App Color Ranges

CO2(ppm)

Good

400

599

Moderate

600

999

Polluted

1000

1499

Very Polluted

1500

2499

Severely Polluted

2500

4000

On-Device Color Ranges

CO2(ppm)

Good - Moderate

0

999

Polluted - Very Polluted

999

2499

Severely Polluted

2499

5000

TVOC

TVOC (Total Volatile Organic Compounds) is the total concentration of volatile organic compounds in the air. VOCs are carbon-containing chemical gases emitted from solids and liquids. Studies show that indoor concentrations of VOCs are higher than outdoor ones.
Besides being hazardous, VOCs play a significant role in the formation of ozone and fine particulates (PM) in the atmosphere.

In-App Color Ranges

TVOC (ppm)

Good

0

0.087

Moderate

0.088

0.261

Polluted

0.262

0.66

Very Polluted

0.661

2.2

Severely Polluted

2.201

3

On-Device Color Ranges

TVOC (ppm)

Good - Moderate

0

0.261

Polluted - Very Polluted

0.261

2.2

Severely Polluted

2.2

60

VOC Index

VOCs (Volatile Organic Compounds) are carbon-containing chemical gases emitted from solids and liquids. Studies show that indoor concentrations of VOCs are higher than outdoor ones.

The VOC index represents the relative intensity and duration of VOC events. The VOC Index visualizes VOC events on a logarithmic scale and relative to the typical indoor gas composition during the last 24 hours. The algorithm calculates the average value for the last 24 hours and assigns it the VOC Index = 100. This means that level “typical” refers to the typical conditions of the environment. The scale does not represent absolute concentrations.

The VOC Index notifies the user when air pollution changes. Notifications are actionable in environments with low and high VOC backgrounds independent of the absolute VOC concentrations.

In-App Color Ranges

VOC Index

Good

0

199

Moderate

200

249

Polluted

250

349

Very Polluted

350

399

Severely Polluted

400

500

On-Device Color Ranges

VOC Index

Good - Moderate

0

199

Polluted - Very Polluted

200

399

Severely Polluted

400

500

NOx Index

Nitrogen oxides are produced by the combustion of fossil fuels and help create particle pollution. Cooking with gas stoves or polluted outdoor air entering from busy roads affect indoor air quality. However, nitrogen oxides are also produced due to natural atmospheric processes. Nitrogen oxides—especially nitrogen dioxide—irritate and damage the respiratory system. Elevated concentrations in the air we breathe have a negative effect on lung function.

NOx index represents relative intensity and duration of NOx events within 1 to 500 points interval.

In-App Color Ranges

VOC Index

Good

0

49

Moderate

50

99

Polluted

100

299

Very Polluted

300

349

Severely Polluted

350

500

On-Device Color Ranges

NOx Index

Good - Moderate

0

49

Polluted - Very Polluted

50

299

Severely Polluted

300

500

CH2O (Formaldehyde)

Formaldehyde, CH2O is a colorless volatile organic compound with a strong odor. There are two main sources of it: off-gassing and combustion. Formaldehyde is presented outdoors, but its concentrations indoors are higher due to its emission prevalence in building materials and household products.

In-App Color Ranges

CH20 (ppm)

Good

0

0.05

Moderate

0.06

0.1

Polluted

0.11

0.3

Very Polluted

0.31

0.75

Severely Polluted

0.76

1

On-Device Color Ranges

CH20 (ppm)

Good - Moderate

0

0.1

Polluted - Very Polluted

0.1

0.75

Severely Polluted

0.75

1.0

PM1

PM1 are ultrafine particles with a diameter smaller than 1 micrometer: dust, combustion particles, bacteria. It’s a major subset of PM2.5.

In-App Color Ranges

PM1 (µg/m3)

Good

0

14

Moderate

15

34

Polluted

35

61

Very Polluted

62

95

Severely Polluted

96

150

PM2.5

PM2.5 or fine particles are 2.5 micrometers in diameter or smaller. They can be made of different chemicals like black carbon, ammonia, sulfur dioxide, etc. They also include pollen, mold, fungal spores, soot, etc.

PM2.5 can be airborne allergens, including molds and fungi, dander, dust mites, and cockroach antigens, and can induce an immune response, they are capable of causing illness at very low exposure levels.

In-App Color Ranges

PM2.5 (µg/m3)

Good

0

20

Moderate

21

50

Polluted

51

90

Very Polluted

91

140

Severely Polluted

141

200

On-Device Color Ranges

PM2.5 (µg/m3)

Good - Moderate

0

50

Polluted - Very Polluted

50

140

Severely Polluted

140

1000

PM10

PM10 or coarse dust particles refer to particles with a diameter less than or equal to 10 microns in size. They are about 30 times smaller than the width of human hair and are small enough to get inhaled into our lungs.

In-App Color Ranges

PM10(µg/m3)

Good

0

30

Moderate

31

75

Polluted

76

125

Very Polluted

126

200

Severely Polluted

201

300

Temperature

Generally, people feel comfortable at temperatures between 21°C to 27°C (69°F to 80°F).

In-App Color Ranges

Temperature (Celsius/Fahrenheit)

Very uncomfortable

5/41

10.9/50.9

Uncomfortable

11/51

14.9/58.9

Slightly uncomfortable

15/59

16.9/61.9

Comfortable

17/62

19.9/67.9

Very comfortable

20/68

25.9/77.9

Comfortable

26/78

28.9/83.9

Slightly uncomfortable

29/84

32.9/90.9

Uncomfortable

33/91

38.9/101.9

Very uncomfortable

39/102

45/113

On-Device Color Ranges

Temperature (Celsius/Fahrenheit)

Very Uncomfortable

0/41

11/51

Slightly Uncomfortable - Uncomfortable

11/51

20/68

Very Comfortable - Comfortable

20/68

29/84

Slightly Uncomfortable - Uncomfortable

29/84

39/102

Very Uncomfortable

39/102

125/257

Humidity

Generally, people feel comfortable at a relative humidity between 40% to 60%.

In-App Color Ranges

Humidity (%)

Very uncomfortable

10

14.9

Uncomfortable

15

19.9

Slightly uncomfortable

20

34.9

Comfortable

35

39.9

Very comfortable

40

49.9

Comfortable

50

64.9

Slightly uncomfortable

65

74.9

Uncomfortable

75

86.9

Very uncomfortable

87

100

On-Device Color Ranges

Humidity (%)

Very Uncomfortable

0

15

Slightly Uncomfortable - Uncomfortable

15

35

Very Comfortable - Comfortable

35

65

Slightly Uncomfortable - Uncomfortable

65

87

Very Uncomfortable

87

100

Light Intensity

Light intensity or Light illuminance refers to the amount of light provided by a light source and evaluates whether the given space has good visibility to perform different tasks.

Light intensity is measured in lux, the number of lumens falling on a square meter, or footcandles (fc), the number of lumens per square foot.

Light intensity requirements depend on the space's specific purposes.
For example, the light levels for a conference room or a library should be 300-500 lux (30-50 fc) while professional laboratories require 750-1200 lux (75-120 fc). Workspaces for people engaged in skillful handwork or for the elderly people need more than 500 lux (46 fc).

During the day, we need high levels of light to stay fresh and alert. In addition, proper light levels prevent eye strain, which allows us to work comfortably for longer periods of time.

Anything from 5 lux (0,46 fc) has the potential to disrupt your sleep, so where possible, dim the lights and avoid screens for an hour before you head for bed – that includes phone screens, which can emit 40 (4 fc) lux of light.

Sunlight typically has an intensity between 50,000 and 100,000 lux (4,600 and 9,300 fc) – far higher than average artificial lighting which is from 250 to 500 lux (23 to 50 fc). Don’t forget to go outdoors periodically to catch sunlight that has a positive effect on our health, energy, and mood.

Light (lux)

Calm light

0

249

Average illumination

250

499

Bright light

500

749

Extremely bright

750

999

Extremely bright

1000

>1000

Noise

A sound's loudness is measured in decibels (dB). Normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged time period may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

Noise (dB)

Quiet

0

39

Average

40

59

Loud

60

79

Harmful

80

119

Dangerous

120

180

CO (Carbon monoxide)

Carbon monoxide is a colorless, odorless, tasteless gas produced by burning gasoline, wood, propane, charcoal, or other fuel. Improperly ventilated appliances and engines, particularly in a tightly sealed or enclosed space, may allow carbon monoxide to accumulate to dangerous levels.

Carbon monoxide poisoning can be particularly dangerous for people during sleep. People may have irreversible brain damage or even die before the problem will be revealed.

In-App Color Ranges

CO (ppm)

Good

0

1.7

Moderate

1.8

8.7

Polluted

8.8

10

Very Polluted

10.1

15

Severely Polluted

15.1

30

On-Device Color Ranges

CO (ppm)

Good - Moderate

0

8.7

Polluted - Very Polluted

8.7

15

Severely Polluted

15

30

O3 (Ozone)

O3 is a colorless, odorless gas at ambient concentrations and is a major component of smog.

Ozone irritates the respiratory tract and eyes. Exposure to high levels results in chest tightness, coughing, and wheezing. People with respiratory and heart problems are at a higher risk.

In-App Color Ranges

O3 (ppm)

Good

0

0.025

Moderate

0.026

0.06

Polluted

0.061

0.075

Very Polluted

0.076

0.1

Severely Polluted

0.101

0.3

On-Device Color Ranges

O3 (ppm)

Good - Moderate

0

0.06

Polluted - Very Polluted

0.061

0.1

Severely Polluted

0.101

0.3