8705 Mass Flow Meter

Brand: Burkert Fluid Control Systems
Does not ship to Virginia, United States

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 of the pressure and the temperature. The digital mass flow meter Type 8705 uses a classic bypass sensor. The actual flow can be read out digitally over RS-communication.

Type 8705 can optionally be calibrated for two different gases, the user can switch between these two gases.

The materials of the parts that come into contact with the medium are selected according to customer specification 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 30 minutes Warm-Up Time: ± 0.3 % of Full Scale
  • After 30 minutes Warm-Up Time: ± 1.5 % 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)

Consumption

  • Power Consumption: Max.

Electrical Connectors

  • D-Sub 9-Pin Plug Connector

Electrical Contacts

  • Normally Closed
  • Normally Open

Enclosure, Body Material

  • Metal
  • Polycarbonate
  • Stainless Steel

Environmental Protection

  • Protection Class: IP40

Flow Rate

  • Full Scale Range: 0.005 to 15 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

  • Measurement is based on the Bypass Thermal (Calorimetric) Principle

Process Temperature

  • -10° to 60° C (14° to 140° F) for Oxygen
  • -10° to 70° C (14° to 158° F)

Ratio

  • Control Range 1:50

Relay Output

  • One Relay Output: 1 A at 25 V, 25 VA

Repeatability

  • ± 0.1 % of Full Scale

Response Time

  • < 3 seconds

Seat / Seal Material

  • Seal: EPDM
  • Seal: FFKM
  • Seal: FKM

Sensor Circuit

  • Residual Ripple: < 2 %

Tolerance

  • Voltage: ± 10 %

Documentation

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