Kobold Bypass Level Indicator, NBK-03 GL
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NBK-03 GL Bypass Level Indicator

Brand: KOBOLD Instruments, Inc
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Kobold Bypass Level Indicator, NBK-03 GL
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 100 / Class 600
  • Temperature: -40° to 400° C (ceramic rollers), 0° to 120° C (PP-rollers)
  • 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 without auxilliary energy
  • Limit contacts
  • Analog Output, HART®, Profibus® PA, Foundation Fieldbus

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Specifications

Brand

Ambient Temperature Range

  • -40° to 145° C (-40° to 293° F)

Applications

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

Approvals & Certifications

  • GL

BSP Connection

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

Burn-Out

  • Downscale - 3.5 mA
  • Up Scale - 23 mA

Cable Material

  • PVC

Communication

  • FOUNDATION Fieldbus
  • HART
  • Loop Link 5905A
  • PROFIBUS PA (EN 50170 Standard)

Consumption

  • < 11 mA

Dimensions

  • Ø 1.73” x 0.80” (Ø 44 x 20.2 mm)

Display

  • LCD Display
  • LED Display

Drain, Vent Valves & Plug

  • 316 Titanium Stainless Steel, 1.4571

Electrical Connectors

  • Cable Gland
  • M20 x 1.5

Electrical Contacts

  • Bistable Changeover Contact
  • Normally Closed & Normally Open

Electrical Rating

  • 24 V / 1.2 W
  • 30 Vac/dc / 100 mA / 1.2 W

Enclosure, Body Material

  • Cast Aluminum

Environmental Protection

  • Explosion-proof: II 1/2 G Ex d IIC T6 Ga/Gb
  • IP54
  • IP65
  • IP66

Flange Size - 1-1/4” (DN 32)

  • 1-1/4” (DN 32) - 150# ASME
  • 1-1/4” (DN 32) - PN 16

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150# ASME
  • 1” (DN 25) - PN 16

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - 150# ASME
  • 1/2” (DN 15) - PN 16

Flange Size - 3/4” (DN 20)

  • 3/4” (DN 20) - 150# ASME
  • 3/4” (DN 20) - PN 16

Gasket Material

  • Klinger SIL - Flat Gasket
  • PTFE - Flat Gasket

Hysteresis

  • 0.59” (15 mm) Approximately

Isolation

  • 1.5 kVac / 50 Vac - Isolation Voltage, Test/Operation

Loop Resistance

  • < 20 milliohms

Materials of Construction

  • 316Ti Stainless Steel - Bypass Tube
  • Anodized Aluminum (Brown) - Carrier Frame
  • Plexiglass - Display
  • Polypropylene - Material Roller

NPT Connection

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

Operating Pressure

  • psi: 0 to 1,450 (kPa: 0 to 10,000, bar: 0 to 100)

Operating Temperature

  • -40° to 120° C (-40° to 248° F) - Polypropylene Rollers
  • -40° to 400° C (-40° to 750° F) - Ceramic Rollers

Operating Voltages

  • 15 Vdc, Max.
  • 30 Vac/dc, Max.

Output

  • 4-20 mA
  • FOUNDATION Fieldbus & PROFIBUS PA

Output Noise

  • 60 dB Min. - Signal to Noise Ratio

Power Requirement

  • 8-35 Vdc
  • Loop Powered

Process Temperature

  • -104° to 200° C (-155° to 392° F)

Resistance

  • 0 to 10,000 ohms - Linear Resistance Input

Resolution

  • 0.39” (10 mm)

Response Time

  • 1 to 60 seconds

Sensor, Probe Type

  • NAMUR Sensor

Switch Type

  • Transistor: Normally Close & Normally Open, Bistable

Update Time

  • 135 milliseconds

Voltage Drop

  • 2.5 V, Max.
  • 3.3 V at 4 mA - LED
  • 3.7 V at 20 mA - LED

Documentation

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