Reotemp’s Series PM25 features a stainless steel case, tube and socket, making the gauges resistant to corrosion from both environment and media. Liquid filling is recommended for severe service. The economical and attractive crimp ring design, along with a variety of convenient panel mounting adapters, make this popular gauge the right choice for many applications. All-Welded Stainless Steel Construction Field Fillable Case, Nema 4X/IP65 Economical Crimped Gauge with Heavy Duty Case Design Ideal for Both Indoor and Outdoor Applications