How does a thermal mass flow meter work?

How does a thermal mass flow meter work?

The thermal mass meter measures gas flow based on the concept of convective heat transfer. Gas flows by the heated flow sensor, and molecules of the gas transport heat away, the sensor cools, and energy is lost. In either case, the meter’s probe inserts into a gas stream of a pipe, stack, or duct.

What are the different types of thermal flow meter?

CHAPTER 2FLOW METER TYPES & PRINCIPLES

• ELECTROMAGNETIC FLOW METER.
• KARMAN VORTEX FLOW METER.
• PADDLE WHEEL FLOW METER.
• FLOATING ELEMENT FLOW METER.
• THERMAL FLOW METER.
• DIFFERENTIAL PRESSURE FLOW METER.
• ULTRASONIC FLOW METER.
• CORIOLIS FLOW METER.

What is the principle of mass flow meter?

Fluid is being pumped through the mass flow meter. When there is mass flow, the tube twists slightly. The arm through which fluid flows away from the axis of rotation must exert a force on the fluid, to increase its angular momentum, so it bends backwards.

Who invented the mass flow meter?

Some of the earliest ideas for a thermal mass flow controller go back as far as 1911, when C.C. Thomas described a flowmeter containing a heated element with two thermometers upstream and downstream of the heated element.

What is thermal principle?

Thermal mass flow meters employ the thermal dispersion principle whereby the rate of heat absorbed by a fluid flowing in a pipe or duct is directly proportional to its mass flow. As flow increases, more heat is absorbed by the gas.

How do you calibrate a thermal mass flow meter?

Thermal Flow Meter Factory Calibration The calibration process involves placing the sensor in one of several different test sections, flowing a known amount of gas through the pipe and then measuring the signal to obtain the desired overheat. This is done at minimum 12 times over the operating range.

What is a thermal meter?

Otherwise known as BTU meters, thermal energy meters are used to measure energy from hydronic-based heating and cooling systems. Thermal meters can be used for multi-tenant residential applications or the monitoring of central plant systems.

How do Coriolis meter work?

Instead of having a rotating frame of reference, Coriolis flow meters work on the principle that the inertia created by fluid flowing through an oscillating tube causes the tube to twist in proportion to mass flowrate. Many Coriolis flow meters have two tubes. These sine waves are the key to measuring mass flow.

Why we use Coriolis flow meter?

Coriolis mass flow meters are used predominately in scientific applications where they measure both corrosive and clean gases and liquids. They are also used in: Pulp and paper processing. Petroleum and oil.

How do you set up a flow meter?

How to Configure Your Flow Meter

1. Click on SENSORS from the home dashboard.
2. Click on ADD SENSOR TO CONTROLLER.
3. Choose a NAME, SENSOR TYPE, and INPUT (flow-related only).
4. Choose which ZONES should be linked to the sensor.
5. Click OK when finished.

How do you install a mass flow meter?

The top 10 tips for installation of thermal mass flow meters/controllers:

1. 1) Mounting position of flow meter. The mounting position is important.
2. 2) Avoid interruptions.
3. 3) Name plate (serial number label)
4. 4) Electrostatic discharge (ESD)
5. 5) Pressure.
6. 6) Check the piping.
7. 7) In line installing.
8. 8) Piping diameter.