The P4B is a 1.125 inch body, multi-gas/multi-range, metal sealed, Mass Flow Meter (MFM).   The P4B digitally calibrated MFM is available with either analog or digital I/O (RS485, DeviceNet). The digital electronics utilize the latest MKS algorithms providing multi-gas/multi-range measurement capability. Included is a digital calibration that yields 1% of Reading accuracy on the calibration gas.