• Silicone-filled gauges provides for readability and long life in tough industrial environments. • Dampened movement• Anti-parallax dial for accurate readings• Hermetically sealed per ASME B40.3 standard to prevent fogging and protect against tough environments• Rugged 304 stainless steel construction with Acrylic lens• Recalibrate using the external reset screw• For use in applications that do not exceeding 200F Accuracy is 1% full-scale when stem is immersed 2'' in liquids or 4'' in gases (immerse models with a 2.5'' stem length 2'' in gases). Measured stem length from the top of the threads to the bottom tip of the stem. Stem dia is 0.25''; threaded connection is 1\/2'' NPT(M). All thermometers meet or exceed ASME B40.3 standards. Maximum environmental temperature for Acrylic lens thermometers is 200F (93C). Discounts: Save 10% on 10-24 assorted thermometers, 15% on 25 to 49, and 20% on 50 or more.