GE H-7 Halogen Detector: Sniffing Out Leaks

Video Description

Introduced in the late 1950s/early 1960s, the GE H-7 was designed to detect leaks in refrigeration systems using halogen-based refrigerants like R-12, R-22, and R-134 (AKA Freon). It uses a halogen diode detector, in which halogens modulate the flow of alkali metal ions between two platinum electrodes. 0:00 Introduction 0:54 External Features 2:04 Setup and Calibration 4:15 Internal Components 4:53 Internal Disassembly 5:25 Halogen Diode Operation 7:48 Notes on Operation 8:36 Amplification and Balancing 9:40 Other GE Detectors 10:56 Outro SOURCES https://www.leybold.com/en/knowledge/vacuum-fundamentals/leak-detection/halogen-leak-detectors https://www.ebay.com/itm/381571590126 https://vtda.org/docs/other/GE_Type_H-10_LeakDetector_OperationService.pdf https://patents.google.com/patent/US3991360A/en https://patents.google.com/patent/US2806991A/en?oq=+US+2,806,991+1957 https://patents.google.com/patent/US2550498A/en?oq=US+2,550,498+1951