MAXIFLOTM Thermal Mass Flowmeter

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Overview MaxiFloTM MST series Thermal Mass Flow Meter is the instrument of choice for reliable and accurate measurement of mass flows for various gases. It measures the mass flow of gas based on constant temperature differential technology and is able to measure gas flow in the range between 0 and 160 NMPS. Because neither temperature nor pressure measurement is required, MST series reduces installation cost and vastly improves system accuracy. The meter is easily installed or retrofitted with minimum downtime and provides superior, long-term process productivity and easy serviceability. MST series can have either inline sensor or insertion sensor. The inline sensor size ranges from 1” (25mm) to 12” (300mm) with either NPT thread connection or flange connection. The insertion sensors are available from 1” (25 mm) and above with the sensor mounting option of either compression fitting or flange. The indicator/transmitter provides a 4-20mA, pulse, RS-485, HART, alarm, etc. Main Features

· Can measure gas/air flow without pressure or temperature compensation

· It can measure mass flow and also volume flow.

· No moving parts

· High accuracy of 1.0% of reading/1.5% FS ±0.5

Reading

· Wide turndown ratio of 100:1

· Field-programming capability available

· SUS 316 stainless steel material for sensor body and sensing elements

· Lightening protection Measuring Principle MST series Thermal Mass Flow Meter utilizes both constant temperature differential (dT) and constant current technologies. The sensor has two elements. The reference RTD measures the gas temperature. The electronics heats the heated element above the gas temperature. It is the job of the electronics to maintain a constant current (MST100 & 300) or a constant dT between the gas temperature and the heated element (MST200). The electronics measures the dT and the current to measure the flow rate.

100% Customer Satisfaction

Thermal Mass Flow Meter

(Series MST)

THER

MAL M

ASS

FLOW

METE

R

MST100

MST200

MST300

MAXIFLOTM Thermal Mass Flowmeter

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Indicator/Transmitter Models

Model Description

MST100 Graphic LCD Indicator with Totalizer Principle: Constant Current Method

MST200

Graphic Backlight LCD Indicator with Totalizer Principle: Constant Temperature Method

MST300

Graphic LCD Indicator with Totalizer Principle: Constant Current Method Only for Air and Nitrogen Gases

The indicator/transmitter can be mounted integrated with the sensor or mounted separately by option.

Sensors

Division Description

Connection /Fitting Pipe Size

Inline NPT Thread 1” ~ 12”

(25 ~ 300mm) Flange

Insertion Compression Fitting 1” ~ 40”

(25 ~ 1000mm) Flange Fitting

For insertion type sensors, mounting accessories (such as compression fitting and flange fitting are supplied upon request.

INDICATORS AND SENSORS MST Series Thermal Mass Flowmeter

MST200 with Insertion Sensor 2” ~ 40” (50~1000mm)

MST100 with Inline Sensor 1”~12” (25~300mm)

MST100 with Insertion Sensor 2” ~ 40” (50~1000mm)

MST300 with Insertion Sensor 1” ~ 12” (25~300mm)

MAXIFLOTM Thermal Mass Flowmeter

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Technical Specifications MST100 MST200 MST300

Technology &

Feature Constant Current Method Constant Temperature Method

Constant Current Method Special Edition Only for Air and Nitrogen Gases

Flow Velocity Range

0.6 ~ 60 Nm/s (Optionally up to 160 Nm/s)

Indicator/Converte

r

Flow Rate, Temperature, Density, Frequency &

Totalizer Graphic LCD

Flow Rate & Totalizer 16 x 2 Alphanumeric LCD with

Backlight

Flow Rate, Totalizer, Velocity & Temperature

Graphic LCD

Key 3-keys 4-keys 3-keys

Output 4-20mA, Frequency, RS-485 (MODBUS), HART

4-20mA, Pulse, RS-485 & Alarm

4-20mA, Frequency, RS-485 (MODBUS), HART

Flow Rate Units Fixed at the Factory

Nm3/h, Nm3/m, Kg/d, Kg/hr, Kg/m, Kg/s, SCFM, SCFH, Lb/d, Lb/h, Lb/m, Lb/s, NLPH, NLPM, SLPM, SMPS, NMPS, SFPM

Fixed at the Factory

Material Indicator Housing – Cast Aluminum, Sensor – SUS316 Max.

Pressure 16 barG

Max. Temperat

ure Indicator: -40~ 150℃

Sensor: Standard: -40 ~ 121℃, High-Temperature: 0 ~ 204℃

Indicator: -40~ 150℃

Enclosure Weather proof (NEMA

4x), IP-65, Ex-proof (Exd IIC T3)

Weather proof (NEMA 4x), IP-65

Weather proof (NEMA 4x), IP-65

Power Supply 24VDC/220VAC 24VDC/220VAC 24VDC

Accuracy ±1.5% FS ±0.5 Reading ±1.0% of Reading ±1.5% FS ±0.5 Reading

Repeatability ±0.5%, Reading ±0.2%, Full Scale ±0.5%, Reading

SPECIFICATIONS

MAXIFLOTM Thermal Mass Flowmeter

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DIMENSIONS – MST100/300

MST100

Compression Fitting Flange Fitting

MST300

MAXIFLOTM Thermal Mass Flowmeter

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DIMENSIONS – MST200

In-Line Type

Insertion Type

Flange Connection Screw Connection

Remote Configuration

Compression Fitting Smart Electronics

Remote Configuration

MAXIFLOTM Thermal Mass Flowmeter

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Model Selection Guide

MST###-###-#-##-##/Options Code

Model Designator

Constant-Current Method Thermal Mass Flow Meter MST100

Constant-Temperature Method Thermal Mass Flow Meter MST200

Constant-Current Method Thermal Mass Flow Meter for N2 Gas and Air MST300

Pipe Size in mm (Describe the dimensions in case of duct) ###

Indicator/Converter Integral I

Remote R

Sensor

Inline Type Threaded (NPT, PT, etc.) FT

Flanged (JIS, ANSI, DIN, etc.) FF

Insertion Type

Compression Fitting (1/2” or 3/4" NPT) IC

Flanged Fitting IF

Power Supply 220VAC P1

24VDC P2

Options

HART instead of RS-485 HT

Pressure Input (Built-in, for MST100 only) PI

Flow Meter Cleaning for Oxygen CL

MAXIFLOTM is a registered trademark of Seil Enterprise Co.

Seil Enterprise Co. Seoul Korea www.maxiflo.co.kr

We are here for you For further information, visit us at www.maxiflo.co.kr