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8703 Mass Flow Meter
Brand: Burkert Fluid Control Systems
Mass flow meter 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 or 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 of the pressure and temperature. The digital mass flow meter type 8703 uses a sensor on silicon chip basis located directly in contact with the gas. Due to the fact that the sensor is directly in the bypass channel a very fast response time of the MFM is reached. The actual flow is given over RS485-communication.
Type 8703 can optionally be calibrated for two different gases, the user is able to switch between these two gases. This instrument communicates with master devices digitally, no further A/D conversions needed. 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)
Approvals & Certifications
- CE
BSP Connection
- G 1/4" Female
Communication
- Digital
- RS-232
- RS-422
- RS-485 (Half-Duplex or Full-Duplex)
- USB
Consumption
- Power Consumption: 5 W
Electrical Connectors
- D-Sub 9-Pin Plug Connector
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- Aluminum
- Metal
- Stainless Steel
Environmental Protection
- Protection Class: IP40
Flow Rate
- Nominal Flow Range: 0.01 to 80 LPM
Indication
- LED Indication for Power, Limit & Error
Media
- Air
- Neutral Gasses
Mounting Position
- Horizontal
- Vertical
NPT Connection
- 1/4" NPT Female
Operating Pressure
- 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)
Relay Output
- One Relay-Output for Limit (Process Value Close to Full Scale Value): 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%
Turndown
- 1:50
