47681308001 is the main pressure gauge used on the bottom of the Ingersoll Rand Rand DA40IM-DA300IM series of modular desiccant air dryers.
47681308001 will work with the following Ingersoll Rand air dryers:
Part #: 47681315001
Part #: 47681309001
Part #: 47681287001
Part #: 47681243001