The 8500 Spot Temperature Sensor (STS) contains a single, 3-wire element resistance bulb that is designed to measure the temperature of liquids at a single localized area, such as at or near the bottom of a storage vessel or in a pipeline. Temperature data is digitized at the tank via the local tank gauge or tank gauge transmitter for transmission to a central location, such as the tank farm or refinery control room. Features: -18" (46 mm), 36" (91 mm), 48" (122 mm) nominal stem lengths - 3/4" (19 mm) NPT, 150# or 300# ANSI RF flanged sockets - 100 Ohm copper or DIN platinum non-inductive wound resistor - Type 304 stainless steel sockets - 0.25" (6.4 mm) standard bulb diameter - Explosion proof aluminum junction box with terminal strip - Other sizes available and configurations optionally available