The FMA5400A/5500A Series electronic gas mass flow controllers provide for controlling the flow of a wide variety of gases from 0-10 SCCM up to 100 SLM. Utilizing heat transfer through a heated tube to measure molecular gas flowrate, the FMA5400A/5500A provides measurement of direct gas mass flowrate, without the need to compensate for

The entire flow stream was heated, and the thermometers measured the temperature rise (Δt) of the gas. Thomas showed that the mass flowrate (M) of the gas was.

The thermal gas mass flow controller is composed of a flow sensor, a diverter channel, a flow regulating valve and an amplifier controller. The gas flow sensor uses the principle of capillary heat transfer thermocalorimetry to measure the mass flow of gas (without temperature and pressure compensation).

High Flow Mass Flow Controllers High flow thermal mass flow controllers and meters offer both elastomer and metal seals for flow rates up to 300 slm. Versions are available for standard and harsh environments where protection from water and dust is required. Showing 5 products in 4 families

1150C Mass-Flo® Vapor Source Mass Flow Controllers are pressure based measurement and control systems designed to meter and control vapor from low vapor pressure liquid and solid sources directly, without the need of a carrier gas using viscous flow through a choked orifice. Deliver source vapor without the need of a carrier gas system

The flow sensor is heated, and the flowing gas molecules transfer or “carry” the heat A mass flow controller is essentially a mass flow meter with a 

As the gas passes through the tube, the electronics sense the amount of heat transferred from one coil to the other. This system ensures that the zero remains 

These mass flow controllers have a flow rate measurement section that includes a sensor, bypass, flow rate control valve, and special circuitry. The gas is input from an Inlet joint, and

Request PDF | Experimental and numerical analysis of heat transfer phenomena in a sensor tube of a mass flow controller | In the present work, the heat 

Thermal flow measuring principle This measuring principle is based on the fact that heat is drawn from a heated body when a fluid flows past. A thermal 

The weight is the mass flow rate times the duration: W = m ∆t. Or, more properly, with gravity and dimensional units considered: Tbefore heat is added. Then: Again, the controller does not add temperature, it manages processes that add or remove thermal energy, and temperature is the response.