Swagelok thermometers are available in acrylic, glass, polycarbonate and safety-glass lenses to meet application requirements. All-welded 304 stainless steel construction is standard, with a 316 stainless steel process connection and stem available. Hermetically sealed cases, in accordance with ASME B40.200 prevent fogging and moisture damage to internal components. The gauges offer 50% over- and underrange protection against damage to internal components up to 500°F (260°C). Silicone-free gel inserts dampen vibration effects. The anti-parallax dial offers easy reading and there is a nexternal adjustment for field calibration.