Which tool is essential for measuring oil pressure in a burner system?

A manometer is the essential tool for measuring oil pressure in a burner system. It is specifically designed to measure the pressure of gases or liquids and can provide accurate readings necessary for ensuring that the burner operates efficiently and safely. In oil burner applications, having the correct pressure is critical for optimal combustion and to avoid issues such as incomplete combustion, which can lead to soot build-up or even hazardous situations.

In contrast, a flow meter is used to measure the flow rate of the oil but does not provide information about the pressure within the system. A thermometer measures temperature, which is important but not directly related to pressure measurements. A torque wrench is utilized for applying specific torque to fasteners, which is irrelevant to oil pressure readings. Understanding the role each tool plays helps in recognizing why the manometer is vital for operational safety and performance in oil burner systems.