Motion or occupancy sensors work by detecting infrared energy or by sending out ultrasonic waves or radio waves and measuring their reflection off a moving object. We currently supply under-desk passive infrared (PIR) motion sensors. This small, wireless device two slots made of a material that’s sensitive to infrared light. When the sensor is idle, both slots detect the same amount of ambient infrared radiation. When a person enters the sensor’s field of view, the movement reaches one half of the sensor before the other. It’s this change between the radiation detected by the two slots that tells the sensor someone is present.

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Secondly, if you can recognise normal operating conditions you can also see when machinery isn’t functioning as well as it should. For example, a higher-than-average operating current could tell you that a motor has been overloaded. This insight means you can schedule maintenance when it’s actually needed rather than pay for routine inspections. You can also fix potential problems straight away and keep unplanned downtime to a minimum.

Motion sensors pick up on physical movement – whether that’s a person, animal or object – in a given area and transform that information into an electric signal. Motion detection has been used in the security industry for years to alert businesses to intruders. They’re found in appliances we use every day, like automatic doors, toilet flushes and hand dryers. And they can also be used to automate building controls like heating and lighting depending on whether or not a space is occupied – helping to reduce both energy consumption and running costs.

While many applications are concerned with safety, the effects of poor air quality aren’t always severe, or even that easy to spot. In today’s well-insulated buildings, rising carbon dioxide levels can lead to stale, stuffy air and complaints like tiredness and headaches. It can affect people’s comfort and wellbeing as well as productivity. And seeing as employers have a responsibility to provide a healthy working environment, it’s not surprising more businesses are using