In industrial refrigeration and liquid storage systems, accurate liquid level monitoring is essential for maintaining safe and efficient operation. The AKS38 Float Level Switch is an electromechanical device designed to detect liquid level changes and provide reliable switching signals for control or alarm purposes.
Based on buoyancy and magnetic field principles, the AKS38 offers stable performance and durability in demanding industrial environments. It is widely used in refrigeration systems using ammonia, Freon, and CO₂.
This article introduces the working principle, technical specifications, key features, and applications of the AKS38 float level switch.
What Is the AKS38 Float Level Switch?
The AKS38 Float Level Switch is an electromechanical liquid level controller designed to monitor and control fluid levels inside tanks, vessels, or refrigeration equipment.
The device uses a floating ball mechanism that moves up and down with the liquid level. When the float reaches a predefined position, it activates an internal micro switch through magnetic force, generating an electrical signal.
These signals can be used to:
Control pumps or valves
Maintain stable liquid levels
Trigger high or low level alarms
Protect equipment from overflow or dry operation
Because of its simple mechanical design, the AKS38 offers high reliability and low maintenance requirements.
Working Principle of the AKS38 Float Level Switch
The AKS38 operates using two basic physical principles:
1. Buoyancy Principle
The float ball rises and falls according to the liquid level inside the valve body. As the liquid level changes, the float position shifts accordingly.
2. Magnetic Switch Activation
A magnetic component inside the float interacts with a micro switch inside the housing. When the float reaches a specific position, the magnetic field triggers the micro switch to generate an electrical signal.
This signal can be used by a control system to activate or deactivate equipment automatically.
AKS38 Technical Specifications
The AKS38 float level switch is designed to meet industrial-grade operating conditions.
Nominal Pressure
4.0 MPa
Test Pressure
6.0 MPa
Operating Temperature
-45°C to +65°C
Applicable Media
Ammonia (NH₃)
Freon (HFC / HCFC)
Carbon dioxide (CO₂)
Electrical Rating
Microelectronic single-pole double-throw switch (SPDT)
250VAC / 10A
30VDC / 5.5A
These specifications allow the AKS38 to perform reliably in demanding refrigeration and industrial control systems.
Key Features of the AKS38 Float Level Switch
High Reliability Mechanical Design
The AKS38 uses a robust electromechanical structure without complex electronics. This design ensures stable performance even in harsh industrial environments.
Dual Function: Control and Alarm
The float level switch can be used for:
Liquid level control
High or low level alarm signals
This flexibility helps improve system safety and operational efficiency.
Compatible With Multiple Refrigerants
The AKS38 is suitable for different refrigeration systems and industrial media, including:
NH₃ (Ammonia refrigeration systems)
HFC / HCFC refrigerants
CO₂ refrigeration systems
This makes it widely used in cold storage and industrial cooling equipment.
Adjustable Liquid Level Range
The liquid level adjustment range is:
12.5 mm – 50 mm
Adjustment step:
12.5 mm
Factory default setting:
50 mm
This adjustable range allows the switch to be configured for different system requirements.
Compact and Practical Design
The AKS38 features a compact design that allows easy installation on tanks, separators, and refrigeration vessels.
Typical dimensions:
| Model | H (mm) | L (mm) | L1 (mm) |
|---|---|---|---|
| AKS38-20 | 400 | 121 | 177 |
| AKS38-25 | 400 | 121 | 177 |
Applications of the AKS38 Float Level Switch
Due to its durability and stable operation, the AKS38 is widely used in various industries.
Industrial Refrigeration Systems
Used for liquid level monitoring in:
Receivers
Evaporators
Separators
Cold Storage Systems
Helps maintain proper refrigerant levels to ensure stable cooling performance.
Chemical Processing Equipment
Used in liquid storage tanks and process vessels for level detection and safety control.
Energy and Gas Systems
Suitable for monitoring liquid levels in CO₂ or other industrial fluid systems.
Advantages of Using the AKS38 Float Level Switch
Compared with other liquid level detection technologies, the AKS38 provides several advantages:
Simple and durable mechanical design
Easy installation and maintenance
Strong resistance to industrial interference
Long service life
Stable switching performance
Because of these benefits, it is a cost-effective solution for liquid level monitoring and control.
Conclusion
The AKS38 Float Level Switch is a reliable and efficient solution for liquid level monitoring in industrial refrigeration and fluid control systems. With its robust construction, wide temperature range, and compatibility with multiple refrigerants, it offers dependable performance in demanding industrial applications.
Whether used for liquid level control or alarm protection, the AKS38 provides a practical and durable solution for maintaining safe and stable system operation.
