Used typically in pharmaceutical, biotechnical, ultra-filtration, or food and dairy industries, these gauges can serve special applications involving chemicals, hard-to-handle liquids, and slurries. Gauges feature electropolished 316L stainless steel socket, Bourdon tube, and diaphragm seal; 300-series stainless steel case and ring; and polycarbonate lens. Bottom connection is 1-½" sanitary quick-connect. Glycerin-filled gauges use pharmaceutical/food quality USP grade glycerin (99.5% pure). Gauges are autoclaveable at 270°F for 15 minutes