TH-1100 热质质量流量计

GENERAL

 

 

TH series THERMAL FLOWMETER is a flowmeter for gas flow mea- surement. Based on Tokyo Keiso's original theory and measuring prin- ciple, the velocity of various kinds of gases are measured by thermal principle. TH can cover from very slow velocity to high velocity that offers very wide range ability compared to other methods of velocity detection of Orifice, Vortex etc.

Various types of detectors and converters are available to meet vari- ety of applications and functional requirements.

 

 

FEATURES

 

 

❑ High accuracy even in very low flow rate

The thermal flow meter maintains ±1% F.S.*1  of accuracy rating even in such a low flow rate corresponding to 0 to 0.5 m/sec. flow velocity.

❑ Extremely low pressure loss

The thin cylindrical shape of sensor is effective in minimising line pressure loss.

❑ Long life

Long term running is guaranteed by the provision of a detector without moving parts and of a converter with a highly reliable circuit.

❑ Free from line pressure fluctuation

Thanks to basic operational principle, TH Thermal Flowmeter is not af- fected by a change of a pressure of the gas.

❑ Negligible influence of gas temperature

In normal usage, gas temperature fluctuation may cause such slight change on output as to be negligible and may be ignored. When gas tem- perature varies widely during operation and very accurate flow rate is re- quired, temperature compensation function is available.

(Not applicable for TR-1000 converter)

❑ Mass flow

Mass flow is obtained by measuring gas temperature and computing it by temperature compensation circuit.

❑ Applicable to various kinds of gases

Based on well analyzed heat conduction mechanism of thin metal tube, applications for gases do not require actual flow rate calibration so long as the physical characteristics are properly specified.

❑ Cost effectiveness

Even in large pipe size application, the only price increasing factor is thin lead pipes of the detector, So the instrument, as a whole, provides excel- lent cost effectiveness.

❑ Wide variation of converter unit

To meet applications and requirements, 4 different types of converter unit are ready to choose.

❑ High and low temperature version

This version is available for the measurement of gases from –196°C to

+550°C.

Namely, this flowmeter can be used for the applications with which the conventional one could not comply.

 

*1 Accuracy of TR-1000 and TRX-5000 converters are ±2.0% F.S.