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NBK-04 Over-Head Level Indicator
Brand: KOBOLD Instruments, Inc
Kobold over-head level indicators are used for continuous measurement, display and monitoring of liquid levels.
The float inside the tank is attached by means of a connecting rod to the magnet carrier in the over-head tube. The magnet fitted in the magnet carrier operates, in a non-contacting manner, the display and monitoring devices fitted outside tube.
Features- Measuring length: maximum 4000 mm
- Maximum pressure: PN 16 / Class 150
- Maximum temperature: 120° C
- Viscosity: maximum 200 mm²/s
- Connection: DIN EN 1092-1 flange DN 50 / 65, ASME B 16.5 flange 2", 2-1/2"
- Material: stainless steel 1.4571
- Insensitive magnet roller display or ball display without auxiliary energy
- Limit contacts
- Analog output, HART®, Profibus-PA®, Foundation Fieldbus®
Specifications
Brand
Accuracy
- ± 0.039” (± 1 mm)
Ambient Temperature Range
- -40° to 145° C (-40° to 293° F)
Applications
- Aggressive Media
- Mixing Vessels
- Storage Tanks
- Water Tanks
Approvals & Certifications
- ATEX
Ball Material
- Brown Anodised Aluminum - Support Rail
- Ultramid & Ultramid B
Cable Entry
- M16 x 1.5
- M20 x 1.5
Cable Length
- 9.84 feet (3 metres)
Cable Material
- Nickel-Plated Brass
- PVC
Communication
- FOUNDATION Fieldbus ITK 4.51
- HART
- Loop Link 5905A
- PROFIBUS PA (EN 50170 Standard)
Consumption
- < 11 mA
Display
- LCD & LED
Electrical Connectors
- Cable Entry
- Cable Gland
Electrical Contacts
- Bistable Changeover Contact
- Normally Closed & Normally Open
Electrical Rating
- 0.1 A at 24 Vdc
- 230 Vac/dc, 1 A, 60 W/VA
- 250 Vac/dc / 1 A / 80 VA
- 400 Vdc / 250 Vac, 0.5 A, 5 W
Enclosure, Body Material
- Aluminum Pressure-Cast
- Polycarbonate
Environmental Protection
- IP54
- IP65
- IP66
- IP67
Fill Material
- Silicone Oil
Flange Size - 2-1/2” (DN 65)
- 2-1/2” (DN 65) - 150# ASME
- 2-1/2” (DN 65) - PN 16
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# ASME
- 2” (DN 50) - PN 16
Hysteresis
- 0.27” to 0.59” (7 to 15 mm)
Isolation
- 1.5 kVac / 50 Vac - Isolation Voltage, Test/Operation
Length
- 1.96 to 13.12 feet (600 to 4,000 mm) - Measuring Length
Load
- 500 ohms, Max.
Materials of Construction
- 304L Stainless Steel - Carrier Frame
- 316Ti Stainless Steel - Connecting Rod
- Borosilicate Glass - Sight Tube
- Makrolon - Sight Tube
- Plexiglass - Display, Sight Tube
- Polypropylene - Roller
- Titanium - Float, Connecting Rod
Operating Pressure
- Maximum
Operating Temperature
- -50° to 120° C (-58° to 248° F)
Operating Voltages
- 15-400 Vdc
- 250 Vac
Output
- 4-20 mA
- FOUNDATION Fieldbus & PROFIBUS PA
Output Noise
- Minimum 60 dB - Signal to Noise Ratio
Plug Material
- 304L Stainless Steel - Sealing Plug
- Aluminum - Sealing Plug
Power Requirement
- 8-35 Vdc
- Loop Powered
Process Temperature
- -50° to 120° C (-58° to 248° F)
Resistance
- 0 to 10,000 ohms - Input Linear Resistance
- 1 kiloohms - On
- 11 kiloohms - Off
Resolution
- 0.39” (10 mm)
Response Time
- 1 second
Scale Panel Material
- 304L Stainless Steel
- Hard PVC
Seat / Seal Material
- Seal: FKM
- Seal: NBR
Sensor, Probe Type
- NAMUR Sensor
- Reed Switch
Supply Voltage
- 24 Vdc, Max.
- 9-32 Vdc
Switch Type
- Transistor: Normally Open & Normally Closed, Bistable
Temperature Range
- 80° C (176° F) - Max.
Update Time
- 135 milliseconds
Voltage Drop
- 2.5 V, Max.
- 3.3 V at 4 mA - LED
- 3.7 V at 20 mA - LED
