THE LOW PRESSURE PEOPLE

PRESSURE GAUGES; PRESSURE SWITCHES; COMBINATION PRESSURE SWITCHES AND GAUGES; AIR FILTER GAUGES; KITS FOR AIR FILTER GAUGE SERVICE COMPRISING AIR FILTERS, GAUGES, AND PARTS THEREFOR; MANOMETERS; OVERPRESSURE SAFETY TRAPS; KITS FOR SERVICING GAS APPLIANCES CONSISTING OF A MANOMETER AND PARTS THEREFOR; PITOT TUBES; AIR VELOCITY METERS; AIR METERS; AIR VOLUME GAUGES; WIND SPEED INDICATORS; WIND METERS; ADJUSTABLE SIGNAL FLAGS; GAUGE CARRYING CASES; SLIDE RULES; ANEMOMETERS; MANOMETER TYPE AIR FLOW BALANCING APPARATUS; COMBINATION SAFEGUARD EQUIPMENT CONSISTING OF DIFFERENTIAL PRESSURE SWITCHES AND PARTS THEREFOR; PRESSURE TRANSDUCERS AND TRANSMITTERS; ELECTRONIC DIGITAL MANOMETERS; ELECTRONIC THERMAL ANEMOMETERS; ELECTRONIC AND GAS VELOCITY TRANSMITTERS; SWING VANE ANEMOMETERS; FLOW SWITCHES AND FLOW INDICATORS; PRECISION MANOMETERS; HUMIDITY INDICATORS; NULL PRESSURE SWITCHES; VARIABLE AREA FLOW METERS; VARIABLE AREA FLOW METER DIRECT READING SCALES; VARIABLE AREA FLOW METER CONVERSION CURVES; VARIABLE AREA FLOW METER METERING VALVES; VARIABLE AREA FLOW METER COMBINATION TEST EQUIPMENT FOR INSURING THE MEETING OF ORIGINAL EQUIPMENT MANUFACTURE REQUIREMENTS AND SPECIAL APPLICATION NEEDS CONSISTING OF FLOW METERS AND PARTS AND FITTINGS THEREFOR; SMOKE DENSITY; INDICATORS; TEMPEATURE INDICATORS; COMBINATION PRODUCTS CARBON DIOXIDE INDICATORS; KITS FOR AIR VELOCITY MEASUREMENT CONSISTING VELOCITY GAUGES AND PARTS THEREOF; KITS FOR AIR VOLUME MEASUREMENT CONSISTING OF AIR VOLUME GAUGES AND PARTS THEREOF; KITS FOR GAS PRESSURE MEASUREMENT CONSISTING OF GAS PRESSURE MANOMETERS AND PARTS THEREOF; AND EQUIPMENT REQUIRED FOR FIELD APPLICATION OF GAUGES CONSISTING OF PARTS FOR GAUGES, AND FITTINGS, TUBING, AND MOUNTING DEVICES REQUIRED FOR SAID FIELD APPLICATION OF GAUGES