For access to this article, please select a purchase option:
Buy article PDF
Buy Knowledge Pack
IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.
With two further process automation system vendors introducing integrated safety solutions, last year's radical development is fast becoming this year's established trend. But that doesn't stop some observers having serious reservations.