Metering Pump is used to pump liquids at adjustable flow rates, which are precise when averaged over time. Delivery of fluids in precise adjustable flow rates are sometimes called metering. The term metering pump is based on the application or use rather than the exact kind of pump used. Although metering pumps can pump water, they are often used to pump chemicals, solutions, or other liquids. Many metering pumps are rated to be able to pump into a high discharge pressure. They are typically made to meter at flow rates, which are practically constant (when averaged over time) within a wide range of discharge (outlet) pressure. Most metering pumps have a pump head and a motor. The liquid being pumped goes through the pump head, entering through an inlet line and leaving through an outlet line. The motor is commonly an electric motor, which drives the pump head.

Methane mine monitor is suitable for underground mine methane monitoring. The monitor provides adjustment-free and single person calibration. Its features include a large digital display for constant indication of gas concentrations in % gas by volume or % LEL, fault codes and calibration cues. It provides relay connections for warn and alarm conditions.