To know when your liquefied petroleum gas (LPG) cylinder is filled up completely, you can either check the weight of the cylinder or use an LPG gas level indicator. Here's how you can do it:
Weight Check: LPG cylinders typically come in various sizes, and the weight of the gas is specified on the cylinder itself (usually in kilograms or pounds). Before refilling, note down the "tare weight" of the empty cylinder (printed on the cylinder) and subtract it from the current weight of the filled cylinder. The result will give you the amount of gas inside. For example, if the tare weight is 15 kg and the filled cylinder weighs 25 kg, then there is approximately 10 kg of gas left.
Gas Level Indicator: Some modern LPG cylinders come with built-in gas level indicators. These indicators show the approximate level of gas remaining inside the cylinder, helping you determine when it needs a refill.
As for using a partially filled or half-filled gas cylinder, you can indeed switch on your gas stove and use it. The gas stove will work perfectly fine regardless of whether the cylinder is full, half-full, or partially filled. The gas is in its liquid form inside the cylinder, and the stove's regulator and burners are designed to handle varying gas pressures.
However, it's essential to keep an eye on the gas level and plan for a refill when the cylinder is running low. Running out of gas in the middle of cooking can be inconvenient, so it's always a good idea to have a spare cylinder or arrange for a refill in advance to avoid any interruptions in your cooking.