THERMAL MASSFLOWMETERS

FEATURE

. Easily install in the field or retrofit.

. All technical parts can be replaced in the local filed(Sensor and Board)

. No pressure compensation needed.

. Auto temperature compensation.

. Wide temperature range(-40℃~200℃)

. Turn down Ratio Max 100 : 1(Minimum)

. Possible to measure low-pressure and low-velocity gas(Min. 0.07m/sec).

SEI-KI PRECISION INSTRUMENT CO., LTD

서울특별시 금천구 가산동 60-73

벽산디지털밸리 5차 709호

TEL 02) 2082-5775

FAX 02) 2082-5776

KTM SERIES

KTM 8000 (Thermal Mass Flowmeters)

SPECIFICATION

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INSTALLATION

Velocity

Output

Accuracy, including linearity (Ref.: 21°C)*

Repeatability

Sensor response time

Turn down ratio

Electronics temperature range

Gas temperature range

Gas pressure effect

Pressure rating maximum

Input power requirement

Flow Transmitter power requirements

Enclosure

Protection

Wetted materials

Standard temperature & pressure

NIST traceable calibration

Sensor material

Type

0.1 - 100 Nm/s

4-20mA, Pulse, RS485 and Hart

±0.2% of Reading, ±0.5% Full Scale

±0.2% of Full Scale

1 second

100:1 minimum

-20°–45°C

-40°–200°C (Extended range available) Negligible over ± 20% of absolute calibration pressure

Up to 16bar(Special option to 35bar)

24VDC @ 250mA, 230 VAC 50/60 Hz

19 watts maximum

Aluminum

IP65Ceramic + 304, 316 Stainless Steel 20°C & 1 atm

Standard Ceramic + 316 Stainless Steel (Hastelloy-C optional)Remote, Integral

Inline Type

Insertion Type

DIMENSION

< S2 >

Size LengthA L

15 280

20 280

25 280

32 350

40 350

50 350

65 400

80 400

100 500

< S1 >

Tool for Insertion type(Optional)

Ball Valve Retractor*Process connection : 3/4" PT(STD)*Max pressure : 10 barG

KTM 8000 (Thermal Mass Flowmeters)

103 152

MODEL SELECTION GUIDE

Working Principle

KTM8000Example: KTM8200-S2D-T1-12"-A150-AIR-O1

KTM8 XXX X X -X -X -X -X -X

200

800

S1

S2

D

A

T1

T2

N

***

A***

***

O1

O2

Description

Input Power

Process Gas Temperature

Probe Length

Output4-20mA , Pulse, RS 485(Standard)

4-20mA , Pulse, HART

Standard(For Inline type)

Flowmeter TypeRemote type

Integral type

Insertion type(50~2000mm)

Select the process gas

10A - 4000AProcess Size

Gas Calibration

Sensor TypeInline type(15~100mm)

AC220V

DC24V

Gas operating range : 0 °C ~ 100 °C

Gas operating range : 0 °C ~ 200 °C

6" - 80" (For Insertion Type)

The thermal mass meter measures gas flow based upon the concept of convective heat transfer.

Either in-line flow bodies or insertion-style probes of the meter support two sensors that

interface with the gas being measured. In the case of the Sagemeter, the sensors are

resistance temperature detectors(RTDs), consisting of extremely durable reference-grade

platinum windings clad in aprotective 316 SS or Hastelloy C sheath.

One of the sensors is heated by an integrated circuit and functions as the flow sensor,

while a second detector acts as the reference sensor, and determines the gas temperature.

The Sage proprietary circuitry maintains a continuous overheat between the flow and

referencesensor. As gas flows by the heated sensor, flowing gas molecules transport heat away

from the sensor and as a result, the sensor cools and the energy is lost.

The circuit balance is disrupted, and the temperature difference ΔT between the heated RTD

and the reference sensor has been altered. Within a second, the circuit restores the lost energy

by heating the flow sensor, to adjust the overheat temperature.

The electrical power required to sustain this overheat denotes the mass flow signal.

KTM 8000 (Thermal Mass Flowmeters)