The intrinsically safe instruments are specifically designed to operate safely in hazardous areas. They are cCSAus intrinsically safe certified to Class I, Div. 1, Groups A, B, C, and D when used with approved zener barrier systems. The two models feature a single piece 316L stainless steel sensing element with a high output silicon glass fused strain gauge. This combination maximizes cycle life even in the presence of pressure spikes, vibration, and aggressive fluid media, according to the manufacturer.