Patent ID: 8122763

Claim:
A gas measurement apparatus, comprising: a housing, comprising: a sensor, configured to measure a pressure of a gas tank; a gas input coupling, configured to receive gas from the gas tank for communication to the sensor; a light source, comprising a plurality of distinct positions or colors to indicate a corresponding level of gas remaining in the gas tank when illuminated, wherein each position or color of the light source includes a plurality of high-intensity light emitting diodes (LEDs), wherein the light source is configured to be visible to a person remote from the gas measurement apparatus, wherein the housing includes a refractive lens integral with the housing and configured to provide a viewing angle of the light source of substantially 180 degrees; and a processor, configured to select the plurality of high-intensity light emitting diodes (LEDs) of at least one of the distinct positions or colors of the light source to indicate the level of gas remaining in the gas tank based on the measured pressure.