We manufacture a pic based system which uses the National LM1830 Level Sensor, today I was stunned to find out the part has been discontinued! (actually sometime in 1998 I believe)... Eventually we sourced a small quantity at $20-00 each (ouch) Does anyone know of an equivalent pin compatible part? This is the LAST time ever I design in a National Semi part. Ray Gardiner ray@dsp.com.au