1. Compact, lightweight design. 2. Easy calibration. 3. Direct-mount. Rosemount invented three types of manifold, respectively 304 ... full range of application to Rosemount Transmitters.For Rosemount two way manifold configurations, it’s available on 304, 305, and ... allows venting, draining, or calibration. For site connection of 2 way manifold, please refer to the conception following: Rosemount two ...