The reference technology prevents poisoning, internal plugging and internal leakage. Complete filling of reference body allows extreme temperature and pressure tolerance.
The HB and HBD Series is available in three designs which use different threaded connections for easy installation depending on the process. For in-line or submerged operations, the 546 uses a ¾-inch MNPT threaded nose, while the 551 used as a quick change sensor includes a 1-inch MNPT threaded adapter for installation. The 551 sensor comes with a nut-loc retainer for quick removal and replacement.
The 547, used with specified ball valve assemblies, is available with a 1-inch MNPT Wrench-tite, or 1-1/4-inch MNPT Hand-tite compression fittings.