Paroscientific inc,usa, manufactures a variety of pressure transducers and precision pressure measuring devices based on quartz crystal resonators with frequency of oscillation proportional to the pressure induced stress. All barometers and barometric standards have pressure range of 800-1100 mbar and facilitate typical accuracy of 0.01 percent of reading both in field as well as in laboratory conditions with a resolution of 0.01 percent ppm. Instruments require no warm-up time and have high reliability and stability. Micro-processor based electronics provides fully temperature compensated, linearised digital outputs through rs:232 interface and the serial bus allows complete remote configuration and control of all operating parameters including resolution, sample rate, choice of engineering units, integration time and sampling commands. The units can be powered from either mains or from 6-16 v dc battery supply, while its internal rechargeable battery option allows over 200 hours of continuous operation. Standards are traceable to nist and the instruments are offered with a 5-year limited warranty, which includes one free inspection, calibration check, zero adjustment and new certification. Typical application areas include aerospace, meteorology, oceanography, laboratory and field instrumentation.
