Xian Yunyi Instrument Co., Ltd.

SRK-100 Thermal Mass Flow Meter

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General Introduction
The advanced technique of Silver Automation Instruments has been introduced to produce this flow meter measuring gas mass flow. Traditional flow meters need to adapt temperature and pressure compensation for measurement of fluid mass flow, whereas this China Thermal Mass Flow meter can directly measure fluid mass flow without requiring temperature and pressure compensation. Its conspicuous features are as follows: direct trade settlement, no movable components, small pressure loss, wide range ratio, high accuracy, high reliability, simple installation and convenient operation. It is extensively used in the industries such as petroleum, chemical industry, medical industry, heat power plant and environmental protection etc.

Typical Applications
Flow measurement of gas in industrial pipelines
Flow measurement of air , used as gas combustion flow meter
Flow measurement of flue gas out of chimneys,
Flow measurement of waterfall gas during water treatment
Flow measurement of gas and compressed air during production of cement, cigarette, and glass,it is a kind of compressed air flow meter,
Flow measurement and used as natural gas flow meter, coal gas flow meter, liquefied gas flow meter (LPG gas flow ), flare gas and hydrogen gas etc.
Flow measurement of trapped gas in steelworks

Technical Specifications from SILVER AUTOMATION INSTRUMENTS


±1% reading;±0.5% full range


±0.5% of full range

Turn down ratio

Normal 100:1; it is decided by calibrated flow range

Upper Limit of Range

80 Nm/s (air,20℃,101.33kPa)

Lower Limit of Range

0.05Nm/s (air,20℃,101.33kPa)


Ø6~ Ø6000 thermal dispersion flow meter

Pressure Range

Negative Pressure, 0~1.0MPa,0~1.6MPa,0~2.0MPa,0~3.0MPa

Medium Temperature



All kinds pure gas or mixed gas with fixed percentage, gas with dust, sand or moisture, corrosive gas

Sensor Diameter

Ø3(standard), Ø4

Sensor Material


Probe Stem Diameter

Ø19(standard), Ø16, Ø12

Probe Stem Material


Power supply

24VDC/400mA or 220VAC/2W


4-20mA DC, max load 1000Ω;RS485


LED; four digits instantaneous flow, eight digits totalized flow


16 non-linearity correction


Remote type: transmitter + flow totalizer

Integral type: transmitter with integral totalizer

Connection type

In-line type and plug-in type


1-2 relay output,3A/220VAC,3A/30VAC,settable

Protection level


Explosive proof



5 years

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