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Environmental Gas Sensors for Outdoor Air Quality

New Posts, Industry, Personal & Smart Health

What is Outdoor Air Quality Detection with Environmental Gas Sensors?

Outdoor air is often referred to as ambient air, which means the air outside buildings, from ground level to several miles above the Earth’s surface.
Outdoor air pollution contains numerous substances of both natural and human caused origin that can cause serious harm to the human health and the environment. Those can be detected by EC Sense’s environmental gas sensors.

Which Outdoor Air Quality Pollution Gases are in the Air?

Gases / PollutantsSources
Carbon Monoxide (CO)Motor vehicles, fires, cigarette smoke, industry
Nitrogen Dioxide (NO2)Emissions from motor vehicles, industry, unflued gas heaters and gas stove tops
Sulfur Dioxide (SO2)Fossil fuel combustion at power plants and other industrial facilities
Ozone (O3)Ground level ozone is the main component of SMOG and is the product of the interaction between sunlight and emissions from sources such as motor vehicles and industry
TVOCIndustry, Motor vehicles
Particulate Matter (PM)Motor vehicles, wood burning heaters, industry

Others: Lead, Pollen, Mold Spores, Dust

Other detection parameter: HR, Air Temperature, Rain, Solar Radiation, Vapor Pressure, Barometric Pressure, Horizontal Wind Speed

What Choices are available for Outdoor Air Quality Detection Solutions?

EC Sense provides environmental gas sensors and gas sensor modules for detection of Outdoor Air Quality Pollutants, e.g. NO2 (Nitrogen Dioxide), CO (Carbon Monoxide), SO2 (Sulfur Dioxide), O3 (Ozone), TVOC (Total Organic Compound) and Outdoor Air Quality.

What are the advantages of EC Sense Environmental Gas Sensor Modules?

  • Lower detectable limit of 1 ppb/1 µg/m³
  • Fast response time

Gas Sensor Features:

  • Small size
  • Long lifetime > 3 years
  • No warm-up time required
  • No zero line drift

Gas Sensor Module Features:

  • Wide temperature range of -40°C to +55°C
  • Detects gas, temperature and humidity
  • Digital signal UART (TTL 3.3V) or I2 C output
  • Low power consumption and sleep mode (suitable for battery and IoT applications)

Which Solutions can EC Sense offer for Outdoor Air Quality?

TB600B Gas Sensor Module – UART & I2C Output:

TB600B – AQI – 10 ppm – Outdoor Air Quality Gas Sensor Module
TB600B – CO – 10 ppm – Carbon Monoxide Gas Sensor Module
TB600B – NO2 – 2 ppm – Nitrogen Dioxide Gas Sensor Module
TB600B – O3 – 5 ppm – Ozone Gas Sensor Module
TB600B – SO2 – 5 ppm – Sulfur Dioxide Gas Sensor Module
TB600B – TVOC – 10 ppm – Total Volatile Organic Compounds Gas Sensor Module

DGM10 Dual Gas Sensor Module – UART, SPI, I2C Output:

(Any two gases can be combined from the table below. Part Number example: 04-DGM10-SO2-NO2-5-2-01)

AQI – 10 ppm – Outdoor Air Quality Dual Gas Sensor Module
CO – 10 ppm – Carbon Monoxide Dual Gas Sensor Module
NO2 – 2 ppm – Nitrogen Dioxide Dual Gas Sensor Module
O3 – 5 ppm – Ozone Dual Gas Sensor Module
SO2 – 5 ppm – Sulfur Dioxide Dual Gas Sensor Module
TVOC -10 ppm – Total Volatile Organic Compounds Dual Gas Sensor Module

In which Applications are EC Sense Products typically used?

  • Smart City
  • Outdoor City Air Quality
  • IoT Big Data Air Quality
  • Outdoor Air Quality Small Station Monitoring

Which Technology makes EC Sense Gas Sensors special?

Picture for Outdoor Air Quality Application Post: image-1

The EC Sense solid polymer electrochemical technology is a revolutionary innovation in the field of electrochemical detection. This technology is based on the principle of electrochemical catalytic reaction, detecting the output signals of the electrochemical reactions of different gases and accurately measuring the gas concentration through the signal. The sensor is composed of three electrodes in contact with the electrolyte. A typical electrode consists of a large surface area of noble metal and other materials. The electrode, electrolyte and the surrounding air are in contact and the gas diffuses into the working electrode. Here the gas will be oxidized, this causes a current, which is proportional to the gas concentration.

Environmental Gas Sensors for Outdoor Air Quality

New Posts, Industry, Personal & Smart Health

Controlling the Air Quality inside and outside of animal farms is important for the health of the animals, the health of the farm workers, for the surrounding neighborhood and environment and finally for the quality of our food and therefore also for the health of the end consumer.
Therefore, EC Sense has developed a reliable Long Life Ammonia Sensor Device, ECtox, which can measure continuously high background ammonia gas concentrations in the air.
Why is Air Quality for Animals important?

The meat consumption has risen steadily in recent years. There is already a large industry that breeds such “meat” at top speed.
A chicken’s life is only 8 weeks long. A pig’s life on a small farm is about a year long; in an industrial farm it is only 120 days. In order to maximize profit, the population in an industrial animal breeding facility is constantly raised. This increases the risk that this population will be affected by diseases.

What is the Cause of the Pollution?

The pollution is caused by the respiration of the animals and by the digestion of the food. Humidity increases due to the high population and because the waste remains in place for a while. Many methane gases are produced during digestion of green fodder. NH3 and H2S are toxic gases and harm animals in higher concentrations.

To optimize cultivation and make the shelf life of our future food acceptable, the following air quality basics should be observed:
1. Temperature and Humidity: Humidities above 70% r.H. and temperatures below 10°C or above 30°C stress our future food.
2. Odors generated by the waste of the animals: Same as us humans, animals produce CO2. However, the animal waste falls to the ground and produces CO2 in the air. Due to a high animal density, the concentration inside a barn is higher than outside. High CO2 levels make the animals tired and weak, sometimes even aggressive. Farmers have to add drugs to the diet to control the situation.
Good air quality would reduce these problems to a minimum.

Pig Farms

Typically, the concentration in a piggery should be below 10ppm. At this level, the pigs remain healthy.
At concentrations above 20ppm NH3, the pigs’ health becomes unstable. The following health risks may occur:
a. Lung infection
b. Heart and cardiac system problems
c. Aggressive behavior, tails and ears are bitten off.
The animals’ health degrades faster, infecting others and not growing as quickly and successfully.
To counteract these problems, the following activities have to happen:
a. Animal wastes are mainly NH3 ammonia, sulfide, amines. Keep this level at least below 15ppm.
b. Measure the NH3 concentration with the ECtox, the only long-life Gas Sensor available at the moment.
c. In case the values are too high air exchange is required.
High NH3 concentrations leaving the piggery will also enter the neighborhood. The gas should be cleaned up before it leaves the stall area. Ozone would be a good cleaning agent for this application.

Chickens, Ducks and Cows

However, the concentration level which affects the animals is in different ranges. As chickens are smaller, they are also affected by smaller ammonia concentrations. The controlled level should be around 5ppm. Only at this level the growth runs at full speed and less medicine is needed to stabilize the animals’ health.

ECtox - Long Life NH3 Sensor Device

Our NH3 Gas Sensor, like any other Gas Sensor on the market, also has problems with continuous background concentrations, whose lifetime quickly deteriorates due to the continuously high ammonia concentrations in the environment. The reason for this is a drift of the zero line over time.
Therefore, EC Sense created an instrument to counteract this common problem in animal husbandry gas sensing.
The ECtox has a free zero line. The technology to detect NH3 is called coulometry. This type of detection does not require calibration because the NH3 is analysed each time it is detected.

Advantages of the ECtox:

  • Long Lifetime
  • Humidity Resistance
  • Anti-Interference
  • Poison Resistance
  • Detects Single Gas + Temp. + Humidity
  • Water and Dust Proof
  • Automatic Scaling from 1 to 500ppm NH3
  • Fully Compensated Digital Output
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