Sierra Instruments” Boiler-Trak smart insertion mass flowmeter is a boiler and heater efficiency solution for natural gas flow measurement applications. The system is also suited for compliance to new regulations for the burning of natural gas in commercial boiler applications. It can be installed or retrofit into existing piping and provides the mass flowrate and totalized flow (200 millisecond response to changes in flowrate) of the natural gas burned. The system”s microprocessor-based transmitter integrates the functions of flow-range adjustment, meter validation, and diagnostics in a probe-mounted NEMA 4X (IP65) housing. Mass flowrate and totalized flow, as well as other configuration variables, can be displayed on an optional backlit LCD panel. The meter also provides an optical/galvanic isolated four to 20 mA output, two alarm outputs, and one contact input for range or gas selection. The programmable transmitter can be configured via RS 232 and Sierra’s Smart Interface software or with three pushbuttons on the device. The meter is suitable for pipes or ducts from 1.25 inches to six inches.