The Analog Devices TMP12 is/was a temperature sensor with a built-in heater making it useful for measuring relative airflow velocity. Does anyone know of a replacement that does a similar function? I don't care about drop-in compatibility. Do people generally use self-heated thermistors for this sort of thing? -- Martin K -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist