3.A.7.All types of pressure transducers capable of measuring absolute pressures and having all of the following characteristics:

a. Pressure sensing elements made of or protected by aluminium, aluminium alloy, aluminium oxide (alumina or sapphire), nickel, nickel alloy with more than 60% nickel by weight, or fully fluorinated hydrocarbon polymers;
b. Seals, if any, essential for sealing the pressure sensing element, and in direct contact with the process medium, made of or protected by aluminium, aluminium alloy, aluminium oxide (alumina or sapphire), nickel, nickel alloy with more than 60% nickel by weight, or fully fluorinated hydrocarbon polymers; and
c. Having either of the following characteristics:
1. A full scale of less than 13 kPa and an “accuracy” of better than 1% of full scale; or
2. A full scale of 13 kPa or greater and an “accuracy” of better than 130 Pa when measuring at 13 kPa.
Technical Notes: 1. In Item 3.A.7. pressure transducers are devices that convert pressure measurements into a signal.
2. In Item 3.A.7. “accuracy” includes non-linearity, hysteresis and repeatability at ambient temperature.