1. Compact, lightweight design. 2. Easy calibration. 3. Direct-mount. Rosemount invented three types of ... full range of application to Rosemount Transmitters.For Rosemount two way manifold configurations, it’s available on 304, 305, and 306 ... valve allows venting, draining, or calibration. For site connection of 2 way manifold, please refer to the conception following: Rosemount two ...