CO/LPG/NOx and fire detection

A CO/LPG/NOx detection system is often necessary to operate the car park ventilation system. The detection system safeguards the air quality in the car park. Apart from CO and LPG sensors, the detection system is provided with an evacuation installation.
Carrying out gas detection is useful when there is a compulsory mechanical ventilation system, because there is a lack of natural ventilation. This should also be protected, which is why we recommend our detectors with RVS casing, which is vandalism proof.

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CO detection

Carbon monoxide (CO) is a toxic gas. Concentrations that have been set as limits should be monitored in the garage. The CO detectors must be positioned at a height of 1.50 metres above the ground. This height is considered as the breathing space of people. The detectors can monitor a maximum floor surface of 400 m².


LPG detection

There should not be any LPG in a car park. LPG is an explosive gas that is heavier than air. In a concentration higher than 10% of the lower explosion level (LEL), maximum ventilation is required and evacuation may be necessary. The LPG detectors should be positioned at a height of 0.15 metres above the ground and can monitor a maximum floor surface of 400 m².


NOx detection

Nitrogen oxide means both nitric oxide (NO) and nitrogen dioxide (NO2).

The sum of the two is indicated as NOX: [NOX] = [NO] + [NO2]. The detection of nitrogen oxides is based on the chemiluminescent reaction between nitrogen monoxide (NO) and ozone (O3). The reference-value method for NOX analysers is based on primary standard gauges for NO and NO2. The standard gauge for NO consists of a certified calibration gas mixture cylinder with a concentration of 100 ppm NO in a nitrogen atmosphere.



Fire detection


This operates the fume removal installation and must be of the optical thermal analogue addressable type. A minimum of one detector per 60 m² is a requirement (to be expanded according to NBN S21-100).
An automatic fire detection system aims to detect fire in a stage when it can be managed with simple means.