1988 coolant temp sensor

start, injector, temp, coolant, sensor, part, left, arrow, http://www.pbase.com/aw11mr2/image/109957519, brown, 100%, flows, head, telling, time, switch, cold, 1988

Hey, Does the sensor circled in red send the temp. reading to the ECU? There is another sensor thats right on the block of the 4AGE too. If it sends data to the ECU could you tell me the part number. Auto stores near me are confused even when I took that sensor in to show them. 37096