When systems fail, engineers tend to focus on the big, the expensive or the exotic. However, it is often a problem with a simple or inexpensive part that shuts an application down or affects performance. The cost of component failure can be significant and is measured in unscheduled outages, costly downtime and lost production. Here, David Almond, head of sales and marketing at switch distributor PVL, explains why pressure switches are one of the most overlooked technologies of all.