8311 Pressure Transmitter/Switch

Brand: Burkert Fluid Control Systems

This intelligent mini transmitter/switch with an extra-large display is specially designed to switch alarms and to establish a monitoring system or an On/Off control loop. The switching points can be programmed with the three-key keypad under the display. In addition, the process value can be transmitted to the PLC (4-20 mA). The connection to the process in the piping is made using standard fittings (G 1/2", 1/2" NPT, Rc 1/2").
Features
  • Indication, monitoring, transmitting and continuous or On/Off control in one device
  • Output signal 4-20 mA, 2-wire for continuous control
  • Transistor or relay outputs for On/Off control or alarm function

Specifications

Accuracy

  • Switch Version: ≤ ± 1.5 % of Full Scale
  • Transmitter 2-Wire Version (For 0° C < T < 70° C): ≤ ± 1 % of Full Scale
  • Transmitter 2-Wire Version (For -20° C < T < 0° C & for 70° C < T < 100° C): ≤ ± 1 % ± 0.03 % of Full Scale/°C

Ambient Temperature Range

  • Operating & Storage: 0° to 60° C (32° to 140° F)

Approvals & Certifications

  • EMC (Transmitter Version: EN 50081-1, 61000-6-2, Switch Version: EN 50081-1, 50082-2)
  • LVD (Transmitter Version: EN 61010-1, Switch Version: EN 61010-1)
  • PED 97/23/CE

BSP Connection

  • G 1/2” Male
  • 1/2” BSPT Male

Burst Pressure

  • psi: 58.02 to 1,740 (kPa: 400 to 12,000, bar: 4 to 120)

Cable Length

  • Voltage Supply Cable: 164 feet (50 metres)

Circuit Protection

  • Short Circuit Protected

Consumption

  • Current (Switch Version): < 750 mA (with Load - PNP Output Configuration)
  • Current (Switch Version): < 80 mA (with Load - Relay Version)
  • Current (Transmitter 2-Wire Version): < 30 mA (700 mA - Max.

Cover Material

  • 20 % Glass Fibre

Diameter

  • Pipe: 1/2” (12.7 mm)

Display

  • Large Digital Display with 8-Characters

Electrical Connectors

  • Cable Plug: EN 175301-803
  • Swivel 5-Pin M12 Male Fixed Connector for Female 5-Pin M12 Cable Plug
  • Voltage Supply Cable: 0.14 to 0.5 mm², Max.
  • Voltage Supply Cable: Shielded

Electrical Contacts

  • Switch Version: Normally Closed
  • Switch Version: Normally Open

Electrical Protection

  • Overvoltage Protection

Element

  • Sensor: Ceramic Cell (Al₂O₃)

Enclosure, Body Material

  • Polycarbonate (PC)

Environmental Protection

  • IP65

Humidity

  • ≤ 80 % Relative Humidity, Non-Condensing

Loop Resistance

  • Transmitter 2-Wire Version: 300 ohms at 18 Vdc
  • Transmitter 2-Wire Version: 550 ohms at 24 Vdc
  • Transmitter 2-Wire Version: 800 ohms at 30 Vdc

Materials of Construction

  • Front Panel Folio: Polyester
  • Multipin: Polyamide (PA)

Nominal Pressure

  • psi: 0 to 725.2 (kPa: 0 to 5,000, bar: 0 to 50)

NPT Connection

  • 1/2” NPT Male

Output

  • Switch Version (NPN Transistor): 0.2-30 Vdc
  • Transistor: 700 mA - Max.
  • Transmitter 2-Wire Version: 4-20 mA

Output Format

  • Open Collector

Plug Material

  • Cable Plug: Polyamide (PA)

Power Supply

  • 12-30 Vdc, Filtered & Regulated

Pressure Cycles

  • Service Life of Pressure Cell: Min. 100 Million Cycles

Pressure Range

  • bar: 2 to 100
  • kPa: 200 to 10,000
  • psi: 29.01 to 1,450

Process Temperature

  • -20° to 100° C (-4° to 212° F)

Relay Output

  • Switch Version: 3 A at 250 Vac / 30 Vdc

Repeatability

  • Switch Version: ≤ ± 0.25 %
  • Transmitter 2-Wire Version: ≤ ± 0.06 %

Reverse Polarity Protection

  • Protected Against Reverse Polarity

Screw Material

  • Stainless Steel

Seat / Seal Material

  • Seal: EPDM
  • Seal: FKM

Shock

  • EN 60068-2-27

Switch Type

  • Transistor (NPN or PNP)

Vibration

  • EN 60068-2-6

Wetted Materials

  • Stainless Steel

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