The SOLFRUNT 1981 process gauge is available in two models; the 1981 model and the 1981 Advantage model with a dampened movement. Both process gauges read gauge pressure, and come with a solid front case and 316L stainless steel wetted surfaces with a seamless bourdon tube for longer life. The 1981 Advantage dampened movement option provides users with some of the benefits liquid filled gauges, without the risk of the fill fluid leaking. These process gauges have a PET turret style case for chemical and petrochemical processing applications. The PET material gives this case superior impact strength and a broad spectrum of chemical resistance. They are available dry, with a dampened movement, or liquid filled with an EZ Fill case. The EZ Fill case is designed to facilitate filling in the field without special tools. the 1981EZ also provides NEMA 4x/IP66 weather protection for outdoor applications. All model 1981 pressure gauges are RoHS compliant to the EU directive 2011/65/EU. Wetted Parts: 316 Stainless Steel Ranges: Vacuum - 30 to 0 "Hg VAC (counterclockwise rotation) Compound - 30"Hg VAC to 300 psi Weather Protection (EZ Fill Case Only): NEMA 4x / IP66