Stand-Alone Level Controllers
Last Updated: April 1, 2025
Description
Stand-Alone Level Controllers are devices designed to monitor and control the level of liquids or solids within a container or system. They operate independently, without the need for integration into a larger control system, providing localized control over the level of materials.
Working Principle
Stand-Alone Level Controllers function by taking sensor inputs to determine the level of a substance within a container. They utilize control functions such as limits, PID (Proportional, Integral, Derivative), and logic to maintain the desired level. These controllers are useful because they provide precise control over material levels, ensuring processes run smoothly and efficiently without the need for constant human intervention.
Applications
Stand-Alone Level Controllers are used in various industries for specific applications. For example, in the chemical industry, they are employed to maintain the correct level of reactants in a reactor. In the food and beverage industry, they ensure that storage tanks are filled to the appropriate level to prevent overflow or shortages. They are also used in the marine industry to monitor and control ballast water levels in ships.
Advantages over other Level Controllers
Stand-Alone Level Controllers offer several advantages over other types of level controllers. They provide localized control, which can be beneficial in situations where integration into a larger system is not feasible or necessary. Additionally, their independence from a central control system can enhance reliability and reduce the risk of system-wide failures.
Limitations
One limitation of Stand-Alone Level Controllers is that they may not be suitable for complex systems requiring integration with other control processes. They might also lack the advanced features and flexibility of more sophisticated, integrated control systems.
Considerations
When considering Stand-Alone Level Controllers, it is important to evaluate initial costs, which can vary depending on the complexity and features of the controller. Operating expenses should also be considered, as well as the durability and accuracy of the device. Replacement and maintenance costs are additional factors that can impact the overall cost-effectiveness of these controllers. It is crucial to select a controller that meets the specific needs of the application while balancing cost and performance.
from Florite International, Inc.
The 900 Series is an economic one loop microcomputer-based instrument incorporating user selectable digital and analog inputs, as well as analog and relay outputs. Other 900 Series features include .005% high accuracy PID, batch, and dose control functions. Additionally, the 900 Series encompasses... [See More]
- Form Factor: Board (optional feature); Chassis; Rack; Stand-Alone; Wall Mount
- Control: Limit; Linear; Feedforward; PID
- Controller Type: Batch; Flow; Laboratory; Pressure
- Features: PLC; Multi-Function; Datalogger; Is a Chart Recorder; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Cleaver-Brooks
Level control is provided for the DA tank while the surge tank receives feed control, with a bias to limit the valve position according to surge tank level. The system accepts a 4-20 ma input signal from each of the DA and Surge level transmitters. Alarms for both tanks include High-High-, Low-,... [See More]
- Form Factor: Stand-Alone
- Features: PLC; Datalogger
- Control: Limit
- Interface: Switches; Digital Front Panel
from Fluidwell bv
The F074 is a basic level / pump controller that works with a preset value and two switch points to control a pump or valve. The low and high level switch points are entered as a percentage of the preset value to switch the device on / off. For pump control applications, the function can be inverted... [See More]
- Form Factor: Chassis; Stand-Alone; Field Mount
- Interface: Digital Front Panel
- Control: Other; Level Controller
- Inputs: 1
from Florite International, Inc.
The Florite Model 990X is an innovative, technically superior, high quality and reliable microcomputer-based controller suitable for any commercial or industrial application. The instruments user configurable screw-terminal channels enable any mix of up to eight inputs and or outputs regardless of... [See More]
- Form Factor: Chassis; Rack; Stand-Alone; Table Top Mount
- Control: Limit; Linear; Feedforward; PID
- Controller Type: Batch; Flow; Laboratory; Pressure
- Features: PLC; Multi-Function; Datalogger; Is a Chart Recorder; Rate Indication/ Control; Totalizing (Length or Roll Diameter) Indication/ Control
from Cleaver-Brooks
The magnostrictive design allows for precise measurement of water level. Advanced technology alerts the operator if the level float is slowing down in relation to normal movement and prompts the operator to perform a water column blowdown. The system also detects if the float has not moved and shuts... [See More]
- Form Factor: Stand-Alone
- Interface: Switches; Digital Front Panel
- Features: Datalogger
- Media: Liquid; Steam