Hollow Core Fiber Methane Sensor Project: Hollow Core Fiber-based methane sensing Data Type: Laboratory Measurements Abstract: We have developed a hollow core fiber optic sensor capable of measuring dissolved methane gas in liquids using only nanoliters of sample gas. The sensor is based on an anti-resonant hollow core fiber combined with a permeable capillary membrane inlet which extracts gas from the liquid for analysis. Generic Instrument Name: anti-resonant hollow core optical fiber