Which instrument can be used to determine the pressure in bulk packages or facility containers?

The pressure gauge is an instrument specifically designed for measuring the pressure within containers, including bulk packages and facility containers. It operates by connecting to the container and displaying the internal pressure, which is crucial for safely monitoring and managing hazardous materials. Understanding the pressure within these containers helps technicians assess whether the containers are within safe operating limits and can alert them to potential overpressure situations which might lead to ruptures or leaks.

Other instruments mentioned do not serve the same purpose. A thermometer measures temperature, which is important but does not provide information about pressure. A flow meter is used to measure the flow rate of liquids or gases, giving insights into how much material is moving but not its pressure. A level gauge indicates the level of a liquid within a tank but does not provide pressure readings. Hence, the pressure gauge is the appropriate choice for determining the pressure in bulk packages or facility containers.