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.
How long does hair dye last? A: Semi-permanent hair color lasts about four weeks or up to 28 shampoos. Permanent hair color lasts until the colored hair grows out, but recoloring is neces... Full Answer >