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BA Level Meter
Brand: KOBOLD Instruments, IncThe Kobold level indicator model BA is suitable for level measurement of liquid products in open containers and inside containers under pressure. The device is based on Archimedes principle. The displacer rod, which is attached to a measuring spring using a chain, immerses into the liquid and is subject to a buoyant force proportional to the mass of the displaced liquid.
Every change in the weight of the rod corresponds to a change in the length of the spring and is therefore a measure of the liquid level. The longitudinal expansion of the spring, i.e. the travel of the rod, will be transmitted from the measuring space to the indicator unit by means of a magnetic coupling. The basic version of the indicator unit consists of a scale with a pointer for displaying the liquid level.
As an option, the indicator unit may be equipped with electrical transmitters for remote display or with limit switches. If the device cannot be installed from above, because, for example, a stirrer is mounted in the container, a special displacement vessel is available for lateral installation.
Since the buoyancy of the displacer rod depends on the density of the measured medium, it must have been designed for the specific liquid to be measured. The meter's design makes it ideal for processes under difficult and rough operating conditions. The devices are available with additional electrical equipment for process monitoring and control.
Specifications
Brand
Accuracy
- ± 0.2 % - Transmitter
- ± 5 mm
Ambient Temperature Range
- -40° to 65° C (-40° to 149° F) Display with Contact
- -40° to 70° C (-40° to 158° F) - Transmitter
- -40° to 80° C (-40° to 176° F) Mounting Part & Display without Contact
Applications
- Stirring Tank
- Storage Tanks
- Tanks with Aggressive Media
- Water Tanks
Approvals & Certifications
- ASME
- CE Ex-Directive 94/9/EG
- DMT 00-ATEX-E 075
- EN 1092
- EN 60529
- Ex II 2 G EEx ia IIC T6
- NAMUR
- SIL
- TÜV 02-ATEX-1926 X
Communication
- HART
- PROFIBUS PA
Current
- 20 mA - Supply Current
Electrical Contacts
- 2 NAMUR Switches
Environmental Protection
- IP20 - Transmitter
- IP65 - Mounting Part & Display Aluminum
- IP67 - Stainless Steel
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# (AMSE B16.5)
- 2” (DN 50) - 300# ASME B16.5
- 2” (DN 50) - PN 40
Materials of Construction
- Aluminum (Stove Enamelled) - Display
- Stainless Steel (Optional) - Display
Nominal Pressure
- psi: 580.2 (bar: 40, kPa: 4,000)
Output
- Galvanically Isolated
- Passive
Output Format
- Analog Output
Output Function
- Inductive Limit Switch
- Microswitch
Power
- 100 mW
Power Requirement
- 14-30 Vdc
Process Temperature
- -40° to 250° C (-40° to 482° F)
Sensor / Probe Material
- Hastelloy
- Stainless Steel
Supply Voltage
- 30 V