The main detector system at the Nuclotron-based Ion Collider fAcility (NICA) located in Dubna. Russia is the Multi-Purpose Detector (MPD). For better calibration reason. the MPD needs an additional trigger system for an off-beam calibration of MPD sub-detectors and for rejection (veto) of cosmic muons. https://www.allfixelectricales.shop/product-category/membrane-switch/