CH CONTROL

THERMOSTATICALLY CONTROLLED ELECTRIC SWITCHES; GAS CALORIMETERS AND METERS; APPARATUS FOR CONTROLLING, INDICATING AND RECORDING THE MEASURING AND MIXING OF COMBUSTIBLE GASES; INSTRUMENTS FOR DETERMINING THE HEATING VALUE OF COMBUSTIBLE GASES; ELECTRONIC TESTING INSTRUMENTS AND EQUIPMENT; GAGING APPARATUS; SURFACE FINISH MEASURING EQUIPMENT; LEVEL INDICATORS; QUALITY CONTROL DATA PROCESSING EQUIPMENT; PROCESS PROGRAMMING APPARATUS AND SYSTEMS; SCALES; AUTOMATIC WEIGHING AND PROPORTIONING SYSTEMS; BATCHING SYSTEMS, AND ALLIED EQUIPMENT-NAMELY, VIBRATORY FEEDERS, ROTARY FEEDERS AND BAG HOLDERS; AND ACCESSORIES FOR AND PARTS OF THE FOREGOING