pneumatic amplifiers, namely, hydraulic and pneumatic pumps for generating calibration test pressure into a closed system for commercial use; gauge and instrument cleaning kits comprising a vacuum pump, valves and solvents for flushing and cleaning pressurized instruments; fluid separators utilizing an elastic diaphragm for isolating two different fluid mediums

pressure gauges; temperature calibrators; calibration systems composed of a calibration device for calibrating pressure and temperature measurement instruments in the nature of a temperature output well for generating a reference temperature to calibrate thermometers and similar temperature measuring devices; calibration systems composed of a high pressure pump for testing purposes, pressure gauges or sensors and pressure control valves; barometer test kits comprising a low pressure pump for testing purposes, pressure gauges or sensors, baumanometer squeeze bulb and pressure control valves; air data test sets, namely, calibrating devices for calibrating altimeters, airspeed indicators, rate-of-climb indicators and other avionic instruments; pressure/vacuum calibrators for calibrating and testing absolute pressure/vacuum measurement devices, gauges and switches; thermo units, namely, calibration devices for calibrating thermometers; optical and mechanical tachometer calibrators; all-purpose calibrators for rotational speed measurement instruments; torque and force calibrators for calibrating torque and force measurement tools and instruments; test chambers, namely, enclosures for proof and burst testing of closed-end, pressurized instruments, depth gauge calibration and other specialized applications in a safe environment; superpressure fittings, namely, component parts and fittings for calibration devices for calibrating pressure measurement instruments and systems in the nature of threaded metal fittings and tubing assemblies; oxygen clean test and calibration equipment, namely, a high pressure pump for testing purposes, pressure gauges or sensors and pressure control valves for regulating the flow of gases and liquids for calibrating instruments used in clean, oxygen rich pneumatic systems; metering valves, namely, control valves for regulating the flow of gases and liquids; testing equipment for measuring pressure in the nature of test hoses for transferring pneumatic and hydraulic calibrating pressure or vacuum into the test circuit; component parts for calibration devices for calibrating pressure and temperature measurement instruments, namely, quick disconnects in the nature of couplings used to connect and disconnect test hoses, superpressure fittings, pressure measuring devices and components within the calibration test circuit