The most basic alarm consists of one or more sensors to detect intruders, and an alerting device to indicate the intrusion. 1  However, a typical premises security alarm employs the following components: 1  Premises control unit (PCU), Alarm Control Panel (ACP), or simply panel: The brain of the system, it reads sensor inputs, tracks arm/disarm status, and signals intrusions.
However, these doses are massive compared with the very low amount of chemicals a woman is exposed to when colouring her hair. Using hair dye when you're pregnant Many women decide to wait to dye their hair until after the first 12 weeks of pregnancy, when the risk of chemical substances harming the baby is much lower. If you're colouring your hair yourself, you can reduce the risk further by making sure you: 1  wear gloves. 2  leave the dye on for the minimum time. 3  work in a well-ventilated room. 4  rinse your scalp once the dye is applied.
The general rule is to wait four to eight weeks before coloring your hair again but as we just learned itâs not always necessary. If your hair is strong and you use a dye which is not too harsh then you can try to wait a little less than that and everything might still turn out fine. In most cases you can feel if your hair is OK and you can dye it sooner or if itâs damaged and needs to be fixed first. Anyways, regardless of the hair type you have and all other things, thereâs no guarantee that your hair will be severely damaged even if you color it, letâs say, twice in one week.