The Magnetrol TA-2 Thermal Dispersion Mass Flow Meter
The First choice for Energy Management Flow Applications
In the energy management arena, the ability to better monitor combustion air, fuel gas flow and compressed air can help identify losses that over short periods of time can affect a plant’s profitability. The two key phrases when discussing instrumentation for the
aforementioned are “cost effective” and “return on investment.” Without question, any situation can be resolved if enough financial resources are thrown in its direction. The idea is to realize the benefit in the shortest time frame possible at the most reasonable cost. Thermal dispersion mass flow meters meet these criteria.
Thermal Dispersion Mass Flow Meter
Thermal mass flow meters are primarily used in air and gas flow measurement applications. The meters consist of a transmitter and probe with temperature sensors (RTDs) located in the pins at the bottom of the probe. The reference sensor measures the process temperature and the other sensor is heated to a specific temperature above the reference. As the flow rate increases, heat gets taken away from the heated sensor. More power is then applied to the heated sensor to maintain the temperature difference. The relationship between power and mass flow rate is established during factory calibration.
Combustion air flow measurement to a boiler is important to maintain a stoichiometric ratio with the amount of fuel being supplied. Too little air flow can result in incomplete combustion along with additional carbon monoxide or pollutants depending on the fuel being burned. On the other hand, too much air flow can cool the furnace and waste heat out of the stack. The repeatability of the air measurement is essential to obtaining the most efficient air-fuel ratio (AFR)d
Measuring fuel gas flow (natural gas or propane) usage to individual combustion sources compared to the output (steam/hot water) can help optimize boiler efficiency and better manage energy consumption. Knowing individual boiler performance may also assist in operating those offering the best efficiency. Lowering fuel consumption is one of the easiest methods to reduce cost and improve profits.
A key role in energy and facilities management is making compressed air systems more reliable and efficient. Valuable resources are wasted when a leak goes unnoticed or cannot be easily isolated.
DBIS estimates that 20–30% of compressor output goes to leaks accounting for thousands of pounds in electrical consumption for wasted air. More extreme cases are the purchase cost of additional/larger compressors to fulfil compressed air needs. The first step to reducing utility costs is to measure the usage. Thermal dispersion technology can be used in branch lines for determining consumption in different sections of the plant or as a relative indication of leakage.

Magnetrol’s Thermatel Enhanced Model TA2 Thermal Mass Flow Meter provides reliable mass measurement for air and gas flow applications. The powerful, yet easy to use, electronics are contained in a compact flameproof enclosure. The TA2 is available with both insertion probes and flow body design for smaller pipe sizes The TA2 offers excellent performance at an exceptional value.
The TA2 is often utilized to manage energy costs or to meet environmental regulations in a variety of industries. TA2 total cost of ownership is reduced through ease of installation, calibration verification in the field and reduced maintenance, with no moving parts or ports to plug. Since the measurement is based on heat transfer, the TA2 has reliable performance at low gas flows and pressures where other technologies have difficulties.
- Direct mass flow measurement of air and gases
- No pressure/temperature correction required
- High turndown ratio 100:1
- Excellent low flow sensitivity
- Low pressure drop
- Calibration verification in the field
- ISO 10025 and NIST traceable calibration
- Repeatability of +/- 0.5% of reading
- ATEX & IECEx certified
For more information on the Thermatel TA2 please contact info@able.co.uk or visit https://able.co.uk/

