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8701 Mass Flow Meter
Brand: Burkert Fluid Control Systems
Mass flow meters are used in process technology for the direct measurement of the mass flow of gases. In case of volumetric flow meters, it is necessary to measure the temperature and the pressure either the density, because gases change their density or rather their volume depending on the pressure. The measurement of the mass flow, on the other hand, is independent on pressure and the temperature.
The digital mass flow meter Type 8701 uses a sensor on silicon chip basis located directly in the bypass channel. Due to the fact that the sensor is directly in the bypass channel a very short response time of the MFM is reached. The actual fow is given as an Analog output signal or could be read out over RS communication.
Type 8701 can optionally be calibrated for two different gases, the user is able to switch between these two gases. The materials of the parts that come into contact with the medium are selected according to customer specifi cation so that the unit can be operated with the complete range of standard process gases.The MassFlowCommunicator software can be used for parameterisation and diagnosis.
Specifications
Accuracy
- After 1 Minute Warm-Up Time: ± 0.3% of Full Scale
- After 1 Minute Warm-Up Time: ± 0.8% of Reading
Ambient Temperature Range
- -10° to 50° C (14° to 122° F)
Applications
- Analytical Instruments
- Environmental Technology
- Gas Flow Measurement
- Medical Technology
- Test Bench Equipment
Approvals & Certifications
- CE
BSP Connection
- G 1/4" Female
Communication
- DeviceNet Bus
- Digital
- Fieldbus, CANopen
- Modbus RTU
- Profibus DP
- RS-232
- RS-422
- RS-485
- USB
Consumption
- Power Consumption: 2.5 W
- Power Consumption: 5 W (with Fieldbus)
Electrical Connectors
- D-Sub 15-Pin Plug Connector
- PROFIBUS-DP, DeviceNet & CANopen: Socket M12 Plug, 5-Pin
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- Aluminum
- Metal
- Plastic
- Polycarbonate
- Stainless Steel
Environmental Protection
- Protection Class: IP40
Flow Rate
- Nominal Flow Range: 0.01 to 80 LPM
Indication
- LED Indication for Limit (with Analog Signals), Communication (with Fieldbus) & Error
Media
- Air
- Neutral Gasses
Mounting Position
- Horizontal
- Vertical
NPT Connection
- 1/4" NPT Female
Operating Pressure
- Maximum
Output
- 0-10 V
- 0-20 mA
- 0-5 V
- 4-20 mA
- Maximum
Output Load
- Maximum
Power Supply
- 24 Vdc
Principle of Operation
- Thermal, Calorimetric
Process Temperature
- -10° to 60° C (14° to 140° F) with Oxygen
- Gas: -10° to 70° C (14° to 158° F)
Ratio
- Span 1:50 (2-100%)
Relay Output
- One Relay Output: 1 A at 25 V, 25 VA
Repeatability
- ± 0.1% of Full Scale
Response Time
- < 300 milliseconds
Seat / Seal Material
- Seal: EPDM
- Seal: FKM
Sensor Circuit
- Residual Ripple: < 2%
Tolerance
- Voltage: ± 10%
