Phenolic gauges have a high level of operator safety. The safety design consists of a solid wall between the pressure sensing element and window, and often a blowout back which protects the user from fluid and particles in the event of failure. Phenolic pressure gauges are generally used within aggressive environments such as chemical and petrochemical processing, food and beverage processing industries, plastic and paper manufacturing plants, oceanographic engineering. They are generally manufactured with stainless steel wetted parts that provide corrosion resistance.