Siemens Air Pressure Switch
SIEMENS QBM 81-3 AIR PRESSURE SWITCH 20-300PA
Part No: 7550156 / MPN: QBM81-3
SIEMENS QBM 81-5 AIR PRESSURE SWITCH 50-500PA
Part No: 7550226 / MPN: QBM81-5
Part No: 7550156 / MPN: QBM81-3
Part No: 7550226 / MPN: QBM81-5