CH375-03 scintillation detector (while drilling) is a high temperature resistant and vibration-resistant scintillation detector for measuring azimuthal gamma. This product integrates high temperature anti-vibration NaI (Tl)  crystal, PMT and voltage divider circuit, high temperature and high voltage power supply and signal processing circuit. It can directly output scintillation counting pulse signal (TTL), and the unique design ensures the stable performance of the detector in high temperature vibration environment. This product has the advantages of simple and convenient use, high reliability and not easy to damage. It is mainly used to determine azimuth gamma in oil logging environment for geological steering.