An intrinsically safe two-channel data logger with internal temperture and relative humidity (RH) sensors, this model has a rugged housing designed for years of reliable use in outdoor applications. This model offers high accuracy, 8- or 12-bit resolution settings, and 64K of memory for long-term deployments.An intrinsically safe two-channel data logger with internal temperature and relative humidity (RH) sensors, this model has a rugged housing designed for years of reliable use in outdoor applications