Volatile Organic Compounds or VOCs are organic chemicals that become a gas at room temperature and are the main origin of air pollution at ground level. A common term used when measuring and eliminating VOCs is “Total VOC” or TVOC. TVOC means the total concentration of multiple VOCs present simultaneously in the air.
The human contribution to indoor air
pollutants has been historically correlated with CO2, which is commonly used as
an indicator for insufficient ventilation in closed spaces, but this doesn’t
cover the complete load.
Volatile organic compounds are known to cause eye, nose and throat irritations,
headache, drowsiness, dizziness, nausea, difficulty concentrating and fatigue.
VOCs in indoor environments evaporate from substances such as cleaning
products, adhesives, paints, new carpets, copiers and printers to building
materials and furnishings. VOCs are also emitted from humans and animals in
their breath, sweat and directly from their skin.
many VOCs, TVOC sensors have an increased selectivity to hydrogen (H2). In
indoor environments, the H2 concentration is expected to correlate well with
the CO2 concentrations as human breath contains significant
concentrations of both CO2 (4 %) and H2 (10 ppm).
Furthermore, humans are the major source of CO2 and H2 in
typical indoor environments. This makes it possible
to distinguish the influence of human presence from other contaminants and
control the ventilation system based on occupation of a space.
function of TVOC level is interesting in environments where indoor air quality
need to be optimised on continuous base, such as living room, office buildings,
certain industrial environments, etc.
CO2 sensors with visual and audible alertToo high CO2 concentrations? Sentera CO2 sensors are now available with audible alert. On top of that, the green, yellow and red LED offer a clear, visual indication of the CO2 level. The supply voltage is 230 V or 24 V.>>>
Sentera provides innovative, easy-to-use control solutions for HVAC installations and ventilation systems. How to optimise your comfort, indoor air quality, safety and overall wellbeing? We have the answer!