Boiler Flow Meter

Boilers are one of the largest energy consumers in any industrial or commercial facility — and one of the least monitored. Without flow measurement on the fuel supply, you're flying blind on combustion efficiency, fuel costs, and equipment health. A boiler running at 78% efficiency when it should be at 85% is wasting thousands of dollars per year, and you won't know until you measure.

The right flow meter for a boiler application depends on what you're measuring — the fuel going in, the steam coming out, or both. Our MEMS thermal mass flow meters handle gas fuel (natural gas, methane, propane-air) on the inlet side. Our multivariable vortex meters handle steam on the outlet side. Both can feed the same data logger or control system.

Fuel side vs steam side measurement

Fuel side measurement tells you how much gas the boiler is consuming. Combined with steam output measurement, you can calculate combustion efficiency and identify when a boiler is drifting out of tune. Fuel-side meters are also essential for cost allocation when multiple boilers serve different processes or buildings.

Steam side measurement tells you how much energy is being delivered to the process. The multivariable vortex meter measures mass flow and energy output directly, accounting for changes in steam pressure and temperature that affect the energy content of the steam.

Common boiler flow meter applications

• Fuel consumption monitoring — track gas usage per boiler for cost allocation and efficiency benchmarking

• Combustion efficiency calculation — compare fuel input to steam output to calculate and trend boiler efficiency

• Multiple boiler submetering — identify which boilers are most and least efficient for load scheduling decisions

• Steam output metering — measure steam delivered to individual processes, buildings, or heat exchangers

• Boiler trending and predictive maintenance — detect gradual efficiency loss before it becomes a breakdown

• Energy management reporting — document fuel and steam data for ISO 50001 compliance or utility rebate programs

What to look for when selecting a boiler flow meter

For gas fuel measurement, the key parameters are pipe size, flow range in SCFM, and gas type. Most small to mid-size boilers use ½" to 2" gas supply lines where our MEMS meter fits directly. Larger boilers with 2" to 8" supply lines use the industrial thermal mass flow meter with insertion option for pipes above 4".

Very low pressure drop is important on the fuel side — the gas supply to a boiler is typically low pressure (under 1 PSIG in many cases), and a meter that creates significant pressure drop can affect burner performance. Our thermal mass flow meters have extremely low pressure drop by design.

For steam measurement, confirm whether you have saturated or superheated steam and what your operating pressure and temperature range is. The multivariable vortex meter handles both, compensating in real time using its built-in pressure and temperature sensors.

Application	Recommended Meter	Why
Gas fuel, ½" to 2" lines	MEMS Thermal Mass Flow Meter	Very low pressure drop, direct SCFM output
Gas fuel, 2" to 8" lines	Industrial Thermal Mass Flow Meter	Higher capacity, insertion option for large pipes
Steam output measurement	Multivariable Vortex Flow Meter	Handles sat. and superheated steam, built-in P&T compensation
Data logging without PLC	Any meter + Cloud Data Logger	Cloud logging, email alerts, no IT infrastructure

In stock and ready to ship

Both gas and steam meters ship from Salinas, CA. Standard configurations are in stock and typically ship within 48 hours. We configure each meter for your application — pipe size, gas type, flow range, and output signals — before it ships.

Call us at (831) 244-8080 to talk through your application, or go straight to the product page to configure and order.

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