FAQ

The volume flow of conductive fluid in a closed pipeline can be determined with a magnetic flow meter. Magnetic flow meters are suitable for conductive water and wastewater applications. Magnetic flow meters are also used in the chemical and petroleum industries for flow measurement and monitoring.

Based on classification there are main two types
1- integral type and
2 – remote type.
In integral type sensor and transmitter assembles together. And in remote type sensor is installs on the pipeline and a transmitter is installed in the instrument room.

Electromagnetic Flow Meter is the best choice for some of the applications such as,
1.Sewage Treatment
2.Effluent Treatment
3.Water and wastewater management.
4.Sugar Industries & Distilleries
5.Automobile and Chemical Industries
6.Boiler Feed Water Measurement Plant

In the case of Manas Electromagnetic Flow Meters, the materials used in the liners are neoprene, polyurethane, and Hard Rubber.
These can be an awesome electric insulator, corrosion or erosion-resistant, and are obstruction proof. For this reason, these can be used for slurry applications and are suitable for most acids, bases, water, and aqueous solutions.

Molasses is a sugar industry by-product that varies depending on the raw sugar composition, production conditions, and primarily comprises large quantities of fermentable sugars (mostly sucrose). The electromagnetic flowmeter uses a new form of liner material and a sanitary lining procedure to meet the food industry’s health requirements. So, it can be used in the sugar production plant to prevent the accumulation of molasses residue in the measuring tube.

A new range of battery-operated flow meters is designed for situations where an electric supply is unavailable and accurate flow measurement is needed.

Electromagnetic flow meters are widely used for flow measurement of conducting fluid. These are used to measure wastewater applications or any dirty liquids that are conductive or water-based.

A flow meter is a device that measures the volumetric or mass flow rate in a variety of applications. The flow meter’s form and capacity are determined by the application. Volumetric and mass flow rates are used to calculate fluids, gases, and liquids.

Electromagnetic flow meters mainly comprise a flow tube and electronics. The sensor is housed inside the ‘Flow Tube’ and the electronics are housed separately and mounted either integral to the flow tube or separately. The sensing mechanism comprises an electromagnetic coil that generates a magnetic field, and electrodes that capture electromotive force (EMF). The EMF generated is proportional to the flow of liquid inside the flow tube.

The Electromagnetic Flow Meter has the unique feature of having full bore flow and hence the meter does not obstruct the flow of the liquid being measured. This means no pressure drop and hence the results of Electromagnetic Flow Meters are more accurate. The measurement is independent of the viscosity, density, pressure & temperature of the flowing medium. The measurement is not affected by solid impurities if the minimum conductivity of 5µs/cm is available. It is true volumetric flow measurement. These days, sensors are more compact in size & are more sensitive. Earth ring or Earth electrode both options are available. Empty tube detection is also provided. All this makes the electromagnetic flow meters very trustworthy.

The Electromagnetic flowmeters measure the velocity of conductive liquids such as water, acids, caustic, and slurries in pipes. The cross-section of the flowmeter is fixed and known. Hence the volumetric flow is measured with these meters. It is essential that the liquid should be conductive. When the electrical conductivity of the liquid is more than around 5S/cm, magnetic flowmeters can accurately measure it.

The main purpose of an electromagnetic flowmeter is to measure the volumetric flow rate of conductive liquids. Electromagnetic flow meters are widely used in industrial applications such as measuring the flow of raw water, drinking water, acids, caustic, slurries, etc.

In the case of the Electromagnetic Flow Meter, the measurement is based on Faraday’s law of electromagnetic induction, which is independent of viscosity, density, pressure & temperature of the flowing medium. The measurement is not affected by solid impurities, as long as the minimum conductivity of 5µs/cm is available. It is true volumetric flow measurement. The pipeline needs to be cut to install this type of flowmeter.

Ultrasonic flow meters make use of sound waves to measure the velocity of fluid moving through a pipe and in turn, measure the volumetric flow of the liquid. There are two types, one is insertion type and the other is ‘clamp-on type. In the latter case, there is no need to cut the pipe & the installation is very easy, especially on the big pipelines, without taking a shutdown. It is possible to ‘Hot tap’ the pipeline to install the insertion type Ultrasonic flow meter, so a shut down may not be required.

When precise flow measurement is needed in remote locations where mains power is unavailable, Manas solar-powered flow meters can be used. Solar-powered flow metering systems can be an excellent way to save money when it comes to powering flow meters in remote locations

A Solar-Powered Flow Meter is a flow meter powered by solar energy. This is an ideal solution for accurate flow measurement in remote areas where electrical power is not accessible or is not reliably available. As the power consumption is taken care by solar energy, there are no operating costs for this meter.  Both Electromagnetic and Ultrasonic flowmeters are available in Solar version.

The main applications of solar-powered flow meters are-

• Irrigation schemes
• Potable water distributed by local bodies
• Waste Water treatment plants
• Mining Industry
• Sewage treatment plants
• Effluent treatment plants

Both electromagnetic flow meters and ultrasonic flow meters are available in solar-powered versions. It is an excellent way to save money when it comes to powering flow meters in remote locations or places where power failures are frequent.

Some of the prominent benefits include are-

• More accurate results under tough operating conditions
• There are no moving parts, no pressure drops, and no maintenance requirements.
• Easy installation and adjustment of transducers
• Budget-friendly and adaptable
• Highly accurate and reliable
• These are usually available in clamp-on and insertion type

Working of ultrasonic flow meter is based on transit time principle which utilizes two transducers that function as both, ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe or inserted in the pipeline by using an isolating ball valve assembly at a specific distance from each other.
Transit Time Flowmeters measure the time it takes for an ultrasonic signal transmitted from one sensor to cross a pipe and be received by a second sensor. Upstream and downstream time measurements are compared.
The time difference is a function of flow of the medium. With no flow, the transit time would be equal in both directions.

An ultrasonic flow meter utilizes ultrasound waves to measure the velocity of a fluid and is used in a variety of fluid applications. Ultrasonic flowmeters are ideal for water and other fluids.

Ultrasonic meters are ideal for wastewater applications or for any dirty liquid which is conductive or water-based but will generally not work with distilled water or drinking water. These flow meters are also ideal for applications where low-pressure drop, chemical compatibility, and low maintenance are required.

BTU means British Thermal Unit. It is the amount of energy required to heat a single pound (lb) of water by one degree Fahrenheit. A BTU meter (also called a Heat Meter) comprises a combination of a flow meter with temperature sensors that measure energy consumption in any liquid heating or cooling system.

A BTU meter can be used to measure the performance of energy-saving equipment, loss of efficiency within a heating or cooling system which means revenue loss. They are also required in heat recovery systems to find out the quantum of recovered heat.

A BTU meter is also called Energy Meter and is used in air conditioning systems to bill the end-user for his/her air conditioning energy usage.

Manas heat transfer meter (Model HET-100L) is popular in Thermic Fluid applications. A Thermic fluid heater is industrial heating equipment used for achieving high temperatures at low pressures. A thermic fluid is typically circulated in the entire system for transferring heat to the desired processes. Primarily, the combustion process heats up the thermic fluid. Then the thermic fluid carries and passes this heat to the desired fluid to achieve the required process temperature. After passing on the heat, this thermic fluid comes back again to the thermic fluid heater and this cycle goes on.

Manas make BTU Meter For Heat Transfer (Model HET-100L) takes care of the compensation of variation in density & specific heat with varying temperatures of the fluid.
It also measures the thermic fluid flow rate & is also useful for measuring thermal transfer for hot water flow. A variety of engineering units are available on the display – Heat in Kcal/hr, Energy in MKcal, Flow in m3/hr, Density in kg/m3, Specific Heat in Kcal/kg°C or KJ/kg°C and Temperature in °C. All this makes it a very handy tool for heat transfer measurement.

Manas Microsystem manufactures Steam Flow Meters that work for Saturated (100°C to 300° C) and Super-heated (300°C – 600°C) steam in closed conduits for pressures upto 30bar.

There are many types of flowmeters, that are suitable for steam and condensate flow measurement. One of the most popular and cost-effective flow meters is the Orifice plate flowmeter. It is best suited for applications where affordability, reliability, and ruggedness are of prime concern.

Turbine flowmeters, Variable area flowmeters, Vortex flowmeters are some other types.

Manas make Steam flow meters work on differential pressure principle.

As per BS 1042 / ISO: 5167 standards, the equation for mass flow when measured with orifice plates:
Qm ∝√ρ. √ ∆P
Where,
Qm = mass flow rate.
ρ = instantaneous density.
∆P =differential pressure.
Thus, by measuring the line pressure and temperature and using relevant algorithms instantaneous density can be found. By knowing the correct density one can compute the accurate flow rate. The further operation of integration, square rooting is like an ordinary totalizer.

The mass flow of saturated and superheated steam can be measured with Manas make steam flow meter Model SFM-150. It operates on the differential pressure concept, has a high level of precision, and installation is very easy. It is best suited for applications where affordability, reliability, and ruggedness are of prime concern.

A Steam Flow Meter is an instrument that measures the flow of steam (Saturated or Superheated or even condensate). It can be used as a heat energy transfer meter to measure thermal energy using various fluids (including thermic fluids / thermic oils) which are being used as the heat transfer medium.

Whenever a fluid of a certain temperature is passed over any substance hotter than the fluid, the heat of the hot substance is taken away because of forced convection by the fluid, and the temperature of that substance drops.
This fall in temperature is related to the mass flow of the fluid passing over the substance. If one can measure the amount of heat taken away by the flowing fluid one can calculate the mass flow rate of gases. Volumetric or mass flow rates, such as liters per second or kilograms per second, are units to measure gas and liquid flow. If the density of the material is known, these measures can be converted to one another.

Natural gas flow can be measured with a Thermal Mass Flow Meter, apart from some other types of flow meters. Thermal Mass Flow Meters need no pressure or temperature compensation and can detect gas mass flow directly. It is accurate, simple to install, and has no moving parts. It also has good rangeability, outstanding low flow sensitivity, and minimum pressure loss, making it the ideal flow solution provider for compressed natural gas measurement. Gas Fired Boiler/burner control, fuel-to-air ratio, and Natural Gas custody transfer are some of the applications that benefit from high-quality natural gas monitoring.

A gas Flow Meter is an instrument used in the measurement of the flow of gases such as CNG, Oxygen, Nitrogen, Compressed air, or many other gases. These are used for residential, commercial, or industrial applications where the gas flow is measured ultimately for purpose of billing the user.

Gas flow is difficult to measure than liquids, as their volume is affected by temperature and pressure. To avoid these problems ‘Thermal Mass Flow Meters’ are becoming popular, as these meters require no pressure or temperature compensation and can detect gas mass flow directly.

These are accurate, simple to install, and have no moving parts.

These meters come with good rangeability, outstanding low flow sensitivity, and minimum pressure loss, making them the ideal flow solution provider for gas flow measurement.

Thermal mass flow meter is a flow meter that uses the concept of conductive and convective heat transfer from a heated sensor to directly measure gas mass flow.

Thermal mass flow meters are used for almost all of the applications for gas flow. Thermal mass flow meters, as the name suggests, use heat to calculate flow. It uses one or more temperature sensors to introduce heat into the flow stream and measures how much heat dissipates.
This approach is most effective when measuring gas mass flow. Due to heat absorption considerations, it is difficult to get a reliable signal using thermal mass flow meters in liquids.

• Direct measurement of mass flow.
• No pressure or temperature compensation required
• 20:1 turndown.
• Wireless data transfer possible. Remote readings are available on wireless.
• Pulse, milliamps, and RS485 output for networking.

Compressed air is costlier than steam. Further, it is invisible when it leaks, unlike steam which is visible at the leakage points. Manas Thermal Mass flow meter will help to assign expenditures, track total consumption, and increase plant productivity by monitoring compressed air usage rates through various facility divisions. Thermal mass flow meters can provide both overall consumption and time tracking, which can aid in identifying high-consumption times.

Measuring gas mass flow is always believed to be costly and difficult. Not anymore. Manas offers Thermal Mass Flow Meters that measure the gas mass flow effectively.  The accuracy and temperature correction of a thermal mass flow meter is optimum, and the repeatability is outstanding.

Manas produces steam flow totalizers for industrial use. The mass flow rates of saturated and superheated steams are measured with these units. It computes the mass flow according to guidelines and measures the instantaneous density based on pressure and temperature.

Boiler draft needs to be measured at 7 different locations in a boiler. Accurate draft measurement can reduce emissions, improve boiler efficiency and reduce energy bills.

The difference between atmospheric pressure and the pressure existing in the furnace or flue gas passage of a boiler is termed as a draft. A draft can also be referred to as the difference in pressure in the combustion chamber area which results in the motion of the flue gases and the air flow.