Various sensors, systems, and methods for monitoring environmental conditions are provided. To enlarge the acceptance solid angle for enhanced sensitivity a truncated lens is used. The gage region includes a first gage section and a second gage section, wherein the first gage section defines a first cross-sectional area that is defined by a first plane that extends through the first gage section and is perpendicular to the central, longitudinal axis. At least one of the communication channels is a wireless communication channel.