The continuous resistance element Model ST-AV91H 1000Ω 375 Platinum Averaging Sensors provide accurate sensing of duct temperatures when a large area must be covered. Temperatures are averaged over the entire length and terminate in a weather resistant housing. The Model ST-AV91H uses an element that closely matches platinum resistance/temperature characteristics over the specified range. The sensors have a copper case that is bendable to a radius of 4" (10.2 cm). They can crisscross a duct or plenum to average out temperature stratification.