Air quality

When cars move around an enclosed parking garage, they release toxic gases like nitrogen dioxides (NO2) and carbon monoxide (CO). It’s important to control this harsh environment to prevent the accumulation of toxic fumes and gases from motor exhaust. In other words, controlled ventilation of car parks is essential to maintain an adequate health and comfort level.

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In parking garages, toxic fumes are released in a - usually - closed and small space. This is extremely dangerous. Toxic gases must be extracted as soon as they are detected. A demand controlled ventilation system ensures your safety and makes significant energy savings possible.

Keep your environment safe

How to measure important parameters

Ventilation systems in parking garages extract polluted air produced by vehicles. Carbon monoxide (CO) has a slightly lighter density than air. Thermal effects and convection usually cause the gas to spread throughout the entire space. For this reason, it is usually advised to install CO sensors at a height of 1,5 m above ground level.

How do I keep the underground air clean?

How do you measure these particular air conditions in your garage?

Due to the typically low ceiling, underground and enclosed car parks present a particular challenge to ventilation systems. That’s why it’s extremely important to have a performant control system to follow up on signs of an increase in toxic gases. Sensors can indicate abnormal measurements in order to steer the ventilation system.

Sentera designed a solution, equipped especially for this category of environments. Our sensors measure temperature, relative humidity, carbon monoxide (CO) and nitrogen dioxide (NO2) levels as well as ambient light.

Measure the conditions of my garage

Power over Modbus

The Sentera product range offers a broad array of HVAC sensors, controllers and fan speed controllers that can share information via a Modbus RTU network. Both power supply and Modbus RTU communication can be transferred via a single cable – Power over Modbus. All devices are integrated on the same platform, working seamlessly together to achieve optimal results. Our solutions optimise your comfort while achieving significant energy savings.


Key Features

  • Interfaces suitable for harsh environments
  • Selectable temperature, relative humidity, CO and NO2 ranges
  • Bootloader for updating the firmware via Modbus RTU communication
  • Day/night detection via ambient light sensor
  • Ambient light sensor with adjustable ‘active’ and ‘standby’ level
  • Modbus RTU (RS485)
  • Removable CO/NO2 sensor element
  • Long-term stability and accuracy
  • Monitoring of temperature, relative humidity, CO and NO2 levels

If you want to control the safety and air quality in your underground or enclosed space, we’d love to guide you.

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