Key benefits Color based temperature display: the indicator changes color with temperature, and green marks the current temperature reference point. Simple operation: place the indicator on a clean area of the lower half of the cylinder. Turn on gas and wait 10 minutes to read the indicator. In winter, the left bar is activated; in summer, the right bar is activated. Safe and accurate measurement: designed to safely and accurately measure gas capacity by reading gas temperature. Temperature range is 10 C to 120 C. What it does Functions as a gas level indicator that uses temperature changes to reflect gas capacity. Provides ataglance guidance by displaying a color change and seasonally indicated bars (left for winter, right for summer). Specifications Temperature measurement range: 10 C to 120 C. Reading approach: color change with a green current temperature reference point. Usage environment: designed to be placed on the lower half of the gas cylinder in a clean area. Use scenarios Home kitchen: monitor cylinder gas level during daily cooking to plan refills and avoid sudden depletion. Outdoor activities: use during camping or caravan trips to determine when a cylinder needs refilling before departure. Small workshops or field service: quick, onsite gas level checks to maintain workflow and safety without removing the cylinder. Notes Ensure the cylinder surface area where the indicator is placed is clean before use.