JC010 Thermal Mass Gas Flow Meter

The principle is that a fluid flowing past a heated temperature sensor removes
a known quantity of heat as it passes.In a thermal flowmeter, the fluid has to
pass two temperature sensors.
BCST smart flow meter Introduction
The principle is that a fluid flowing past a heated temperature sensor removes
a known quantity of heat as it passes.In a thermal flowmeter, the fluid has to
pass two temperature sensors. One sensor obtains a reference value by measuring
the actual process temperature. The second sensor is a heating element and it
receives precisely as much energy as is needed to compensate for dispersed heat
and maintain a precisely defined temperature difference.
The higher the mass flow past the heated temperature sensor, the more heat is
dissipated and the more power has to be input to the element to maintain the
temperature difference.
Heating current, therefore, is a measure of the mass flow of the gas.
Due to the sensor temperature is always 30℃ higher than the medium temperature
(environment temperature), and the meter adopts method of constant differential
temperature, therefore the meter do not need to do temperature and pressure
compensation in principle.
BCST Thermal Mass Gas Flow Meter Features
1. Measure mass flow , no need for humidity and pressure compensation.
2. Large rangeability, flow velocity: 0.1 Nm/s~100Nm/s.
3. No pressure drops, applicable to any section pipe.
4. Anti-corrosion, applicable to corrosive gas.
5. Online installation and maintenance.
6. Measures mass flow directly - without additional pressure and temperature
inputs
7. Accurate measurement and operation at very low gas pressures and flow rates
8. Negligible pressure drop

Insert type Pipe type
Medium Single gas ( except acetylene gas) or mixed gas of fixed
Pipe size DN80-6000mm DN15-2000mm
Velocity 0.1Nm/s~100Nm/s ( standard working condition 20 ℃101.33Kpa)
Accuracy +1%
Medium temperature -40~200℃
Pressure 2.5Mpa 4.0Mpa
Power supply AC220V or DC24V for integral converter and AC220V for split
converter.
Response time ≦1s
Signal output 4~20mA RS-485,Modbus
Display Instantaneous flow, mass flow, volume flow, cumulative flow, Beijing
time, running time.
Sensor IP code IP68
Converter IP code IP67 for integral typeIP 65 for split hanging typeIP 52
for split box type
Explosion proof degrade Exd IΙ CT 4

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