The features of the 90EP adjustable electronic pressure switch fromTexas Instruments, Inc. (Dallas) include multiple pressure ranges between 0 and 75 psi and 0 to 30,000 psi, and the option of one or two relays. Other features include a choice of factory-set switching points or manually-set switching points with a P.I.N. for security; ±0.5% F.S. at room temperature; conformance to EMC/ESD, EN 50082-1, EN 50082-2; and vibration requirements of 10g at 20 Hz up to 1 kHz.