SASH CONTROL SENSORS FOR FUME HOODS. A VERTICAL SASH SENSOR. A PRECISION POTENTIOMETER COUPLED WITH A STAINLESS STEEL, NYLON JACKETED CABLE THAT ATTACHES TO THE VERTICALLY RISING FUME HOOD SASH OR COUNTERWEIGHT CABLE. AS THE SASH MOVES THE REEL, POTENTIOMETER ROTATES TO CHANGE THE RESISTANCE.

THE SASH SENSOR HAS BEEN CLASSIFIED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETIVE RULES (GIRS) GIR 1 HAS BEEN USED TO CLASSIFY THE PRODUCT BY THE TERMS OF HEADING 8533 ELECTRICAL RESISTORS (INCLUDING RHEOSTATS AND POTENTIOMETERS), OTHER THAN HEATING RESISTORS GIR 6 HAS BEEN USED TO CLASSIFY THE PRODUCT TO SUBHEADING LEVEL 853340 OTHER VARIABLE RESISTORS, INCLUDING RHEOSTATS AND POTENTIOMETERS CN CODE 85334090 FOR A POWER CAPACITY EXCEEDING 20 W ALSO CLASSIFIED IN ACCORDANCE WITH THE FOLLOWING:- THE HSENS TO HEADING 8533