8400 Screw-In Temperature Sensor/Switch

Brand: Burkert Fluid Control Systems

This intelligent sensor/switch with an extralarge display is specifically designed to switch a valve and to establish a monitoring system or an ON/OFF control loop. 

Compact and wall versions are available. The wall-mounted version must be inserted into a holder previously mounted on a wall, and it must be associated with a remote temperature sensor. 

The switching points can be programmed with the 3 key pads or optionally, with input 4-20 mA, from an external PLC over a 4-20 mA loop. As an option, the process value can additionally be transmitted to the PLC (4-20 mA). 

The connection of the 8400 to the process in the piping is made using standard fittings.
Features
  • Indication, monitoring, transmitting and On/Off control in one device
  • Extra-large display
  • Menu-guided parametrisation
  • Complete control loop with external setpoint

Specifications

Accuracy

  • Switching: ± 0.5° C (± 0.9° F) at (0° to 80° C [32° to 176° F])
  • Switching: ± 1.5° C (± 2.7° F) at (Outside of 0° to 80° C [32° to 176° F])

Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Approvals & Certifications

  • CE
  • EU Directives
  • PED 2014/68/EU

BSP Connection

  • G 1/2” Male
  • 1/2” BSPT Male

Circuit Protection

  • Short Circuit Protected

Consumption

  • Current (Compact Version): 80 mA - Max.
  • Current (Wall Mounted Version): 50 mA - Max.

Diameter

  • Any Pipe with Sensor Connection 1/2” (12.7 mm)

Display

  • Large Digital Display with 8-Characters (4-Digital & 4 Alphanumeric Characters)

Electrical Connectors

  • 1/2” NPT Female Cable Plug
  • Cable Plug: EN 175301-803
  • M16 x 1.5 mm Cable Plug (Female)
  • Multipin: Swivel M12, 5-Pin or M12, 4-Pin or 8-Pin
  • Voltage Supply Cable: 0.14 to 0.5 mm², Max.
  • Voltage Supply Cable: Shielded

Enclosure, Body Material

  • 20 % Glass Fibre
  • Polycarbonate (PC)

Environmental Protection

  • IP65

Humidity

  • ≤ 80 % Relative Humidity, Non-Condensing

Input

  • Input External Set Point (Compact Version): 4-20 mA
  • Pt100 (3-Wired)

Input Impedance

  • Input External Set Point (Compact Version): 250 ohms, Max.
  • Voltage Supply Cable (Wall Mounted Version): 5 ohms, Max.

Loop Resistance

  • 1,000 ohms at 30 Vdc
  • 500 ohms at 18 Vdc
  • 800 ohms at 24 Vdc

Materials of Construction

  • Front Panel Folio: Polyester
  • Multipin: Polyamide (PA)
  • Wall Mounted Holder: PVC

Mounting

  • Wall Mounted

NPT Connection

  • 1/2” NPT Male

Output

  • 4-20 mA
  • Compact Version (Transistor): 5-30 Vdc at 700 mA - Max.
  • Wall Mounted Version: 700 mA at 30 Vdc, Max.

Output Format

  • Compact Version (Transistor): Open Collector

Plug Material

  • Cable Plug: Polyamide (PA)

Power Supply

  • 12-30 Vdc, Filtered & Regulated

Pressure Range

  • psi: 0 to 232.1 (kPa: 0 to 1,600, bar: 0 to 16) - Max.

Process Temperature

  • 125° C (257° F) - Max.

Relay Output

  • Compact Version: 3 A at 30 Vdc
  • Compact Version: 3 A at 48/250 Vac

Repeatability

  • ≤ ± 0.4 %

Response Time

  • 10 to 90 %: 7 seconds (For One Step Increment from 0 to 100° C [32 to 212° F])

Reverse Polarity Protection

  • Protected Against Reverse Polarity

RTD Type

  • Pt100

Screw Material

  • Stainless Steel

Seat / Seal Material

  • Seal: FKM

Sensor, Probe Connection

  • 3-Wire

Set Point - Decreasing

  • -40° to 125° C (-40° to 257° F)

Set Point - Increasing

  • -40° to 125° C (-40° to 257° F)

Switch Type

  • Transistor (NPN & PNP)

Wetted Materials

  • Sensor Element: Stainless Steel

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