NBK-03 Bypass Level Indicator

Brand: KOBOLD Instruments, Inc.

Kobold bypass level indicators are used for continuous measurement, display and monitoring of liquid levels. The bypass tube is attached onto the side wall of the vessel. According to the law of communicating tubes the level in the bypass tube equals the level in the vessel.

A float with embedded circular magnets in the bypass tube follows the liquid level and transfers it in a non-contacting manner to a display fitted outside the tube or to a monitoring device.
Features
  • Measuring length: Single-part maximum 5,500 mm, over 5,500 mm two part or multipart
  • Pressure: maximum PN 320 
  • Temperature: -40° to 400° C
  • Viscosity: maximum 200 mm²/s standard (Option: 460 mm²/s, only NBK-03)
  • Connection: DIN flange DN15 to DN50, ANSI flange 1/2" to 2", R and NPT threads, Welding nipple DN15 to DN32
  • Material: stainless steel 1.4571
  • Insensitive magnet roller or ball display without auxiliary energy
  • Limit contacts
  • Analog output, HART®, Profibus® PA, Foundation Fieldbus

Specifications

Accuracy

  • ± 0.039" (± 1 mm)

Ambient Temperature Range

  • -40° to 350° C (-40° to 662° F)

Applications

  • Agitator Vessel
  • Storage Tanks
  • Tanks on Ships
  • Water Tanks

Approvals & Certifications

  • ATEX
  • CE
  • GL

Ball Material

  • Ultramid & Ultramid B

Bandwidth

  • Minumum 60 dB - Signal to Noise Ratio

BSP Connection

  • 1" BSPT
  • 1/2" BSPT
  • 1-1/4" BSPT
  • 3/4" BSPT

Cable Entry

  • M16 × 1.5

Cable Length

  • 10 feet (3 metres)

Cable Material

  • Brass Nickel-Plated
  • PVC

Communication

  • FOUNDATION Fieldbus
  • HART
  • Loop Link 5905A
  • PROFIBUS PA

Consumption

  • < 11 mA

Current

  • Maximum

Dimensions

  • Ø 1.73" × 0.80" (Ø 44 × 20.2 mm)

Display

  • LED, LCD Display

Electrical Connectors

  • Cable Gland M20×1.5 (PVC)

Electrical Contacts

  • Bistable
  • Normally Open

Electrical Rating

  • 230 Vac/dc at 1 A, 60 W/VA - Maximum
  • 250 Vac/dc at 1 A, 80 VA - Maximum

Enclosure, Body Material

  • Aluminum Pressure-Cast
  • Polycarbonate

Environmental Protection

  • IP54
  • IP65
  • IP66
  • IP67

Flange Size - 1" (DN 25)

  • 1" (DN 25) - Class 150
  • 1" (DN 25) - PN 16

Flange Size - 1/2" (DN 15)

  • 1/2" (DN 15) - Class 150
  • 1/2" (DN 15) - PN 16

Flange Size - 1-1/2" (DN 40)

  • 1-1/2" (DN 40) - Class 150
  • 1-1/2" (DN 40) - PN 16

Flange Size - 1-1/4" (DN 32)

  • 1-1/4" (DN 32) - Class 150
  • 1-1/4" (DN 32) - PN 16

Flange Size - 2" (DN 50)

  • 2" (DN 50) - Class 150
  • 2" (DN 50) - PN 16

Flange Size - 3/4" (DN 20)

  • 3/4" (DN 20) - Class 150
  • 3/4" (DN 20) - PN 16

Function

  • 2 Analog

Gasket Material

  • Klinger SIL
  • PTFE

Hysteresis

  • 0.28" (7 mm)

Isolation

  • 1.5 kVac / 50 Vac

Length

  • Maximum

Load Impedance

  • (Vsupply-9 V)/0.02 ohms
  • ≤ (Vsupply-8 V) / 0.023 ohms

Materials of Construction

  • 304L Stainless Steel
  • 316Ti Stainless Steel
  • Aluminum Brown Anodised - Carrier Frame Material, Ball Support Rail
  • Borosilicate Glass - Display Glass, Sight Tube
  • Ceramic
  • Makrolon - Sight Tube
  • Plexiglass - Display Glass, Sight Tube
  • Polypropylene - Material Roller

Maximum System Pressure

  • psi: 4,641 (kPa: 32,000, bar: 320)

NPT Connection

  • 1" NPT Female
  • 1/2" NPT Female
  • 1-1/4" NPT Female
  • 3/4" NPT Female

Operating Temperature

  • -104° to 400° C (-155.2° to 752° F)

Output

  • 4-20 mA

Output Format

  • Analog Output

Output Load

  • Maximum

Power Requirement

  • 5 W
  • 8-35 Vdc

Programming

  • Loop Link

Resistance

  • 0 to 10,000 ohms - Linear Resistance Input
  • 0.7 to 7 kiloohms - Total Resistance
  • 20 milliohms to 11,000 ohms

Resolution

  • 0.39" (10 mm)

Response Time

  • 1 second

Scale Panel Material

  • 304L Stainless Steel
  • Hard PVC

Seat / Seal Material

  • 304L Stainless Steel
  • Aluminum
  • FPM
  • Per Buna-N

Sensor, Probe Connection

  • 2-Wire

Sensor, Probe Type

  • NAMUR Sensor
  • Reed Switch

Supply Voltage

  • 2.5-400 V
  • Loop Powered

Update Time

  • 135 milliseconds

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