The THV-5 Oval Float Switch is designed for reliable liquid level control in tanks, pump systems, sumps, reservoirs and wastewater applications. With its smooth oval housing and cable-suspended structure, it provides a practical solution for automatic filling, draining, overflow prevention and low-level protection.
Unlike sharp-corner or flat-body float switches, the THV-5 uses a rounded oval profile that moves naturally with the liquid surface. This makes it a strong choice for customers who need a compact, easy-to-install float switch for everyday water level control, especially where stable movement and simple maintenance matter.
It can be used as a high-level switch, low-level switch, pump start/stop switch, or liquid level alarm switch, depending on the wiring method and installation position.
A Practical Oval Float Switch for Automatic Level Control
In many tank and pump systems, operators need a simple signal: when the liquid reaches a certain level, the pump should start, stop, or trigger an alarm. The THV-5 Oval Float Switch is built for this kind of direct and dependable control.
When the liquid level rises or falls, the float body changes position with the water surface. The internal switching mechanism then opens or closes the electrical circuit, sending a signal to the pump, control panel, valve or alarm device.
This simple mechanical working principle makes the THV-5 easy to understand, easy to install and suitable for long-term use in many industrial and commercial systems.
Why Choose an Oval Float Switch?
The oval design is not only about appearance. For liquid level control, body shape affects how the float moves, how it responds to liquid level changes and how easily it fits into different tank spaces.
The THV-5 oval body offers several practical advantages:
Smooth Floating Movement
The rounded shape allows the float to rise and fall smoothly with the liquid surface. This helps reduce unstable movement caused by sharp edges or awkward body angles.
Compact and Easy to Position
The oval housing is suitable for tanks, sumps and containers where installation space is limited. It can be suspended by cable and adjusted according to the required switching level.
Less Risk of Snagging
Compared with more angular float switch bodies, the smooth oval profile is less likely to catch on tank walls, cables or nearby structures when properly installed.
Suitable for Pump Up and Pump Down Control
The THV-5 can be used for both filling and draining applications. It can help prevent pump dry running, tank overflow and unnecessary manual monitoring.
Key Features
- Oval floating body for stable movement in water and common liquid applications
- Automatic liquid level control for pump start/stop, filling, draining and alarm systems
- Cable-suspended design for flexible installation in tanks, reservoirs and sumps
- Simple mechanical switching structure for easy operation and maintenance
- Suitable for high-level and low-level detection depending on installation method
- Optional cable length available for different tank depths and control distances
- OEM and bulk supply available for distributors, pump system builders and equipment manufacturers
- Practical replacement option for water tank, sump pump and wastewater level control systems
Typical Applications
The THV-5 Oval Float Switch can be used in a wide range of liquid level control systems, including:
Water Tanks
Used to control water filling, water discharge, overflow protection and low-water alarm in storage tanks.
Pump Control Systems
Works with pumps to start or stop operation automatically according to the liquid level.
Sump Pumps and Drainage Systems
Suitable for basement sump pits, drainage wells and water collection systems where automatic pumping is required.
Wastewater and Sewage Systems
Can be used in wastewater tanks, sewage pits and treatment systems for level monitoring and pump control.
Industrial Liquid Containers
Suitable for many non-corrosive liquid level control applications in industrial equipment, processing tanks and utility systems.
Agricultural and Irrigation Systems
Helps manage water level in irrigation tanks, water supply tanks and farm drainage systems.
How the THV-5 Oval Float Switch Works
The THV-5 is installed inside the tank or container and connected to a pump, controller, relay or alarm system. As the liquid level changes, the float rises or falls with the surface.
When the float reaches the preset angle or position, the internal switch changes state. This signal can be used to:
- Start a pump when the water level becomes too high
- Stop a pump when the tank is nearly empty
- Open or close a valve through a control system
- Activate a high-level or low-level alarm
- Protect pumps from dry running
- Prevent tank overflow
This makes the THV-5 a simple but effective component for automatic liquid level management.
Product Specifications
| Item | Description |
| Product Name | THV-5 Oval Float Switch |
| Body Shape | Oval |
| Function | Liquid level detection and pump control |
| Installation Type | Cable-suspended |
| Control Type | High-level / low-level control |
| Contact Form | NO / NC options available |
| Application Medium | Water, wastewater and compatible non-corrosive liquids |
| Cable Length | Customizable |
| Main Uses | Water tank, sump pump, drainage system, wastewater system, pump control panel |
| Custom Options | Cable length, color, packaging, logo and bulk order support |
Note: Final electrical rating, cable material, operating temperature and protection grade can be confirmed according to your project requirements.
Installation Notes
For better performance, please pay attention to the following installation points:
- Keep enough free space around the float body so it can move naturally with the liquid level.
- Avoid placing the float too close to the tank wall, pump inlet or strong water flow area.
- Use a suitable cable fixing point or counterweight to set the switching level.
- Confirm the wiring method before installation, especially when using the switch for pump up or pump down control.
- Check whether the liquid is compatible with the float body and cable material.
- For high-power pump systems, connect the float switch through a relay or control panel instead of directly driving the pump.
Correct installation helps improve switching accuracy, service life and overall system safety.
THV-5 vs. Other Float Switch Shapes
Different float switch shapes are suitable for different installation habits and tank conditions.
The THV-1 triangular float switch is often used where a more angular and weighted body is preferred.
The THV-2 rectangular flat float switch is more suitable for flat-body positioning and simple tank control.
The THV-3 round flat float switch focuses on compact round-body floating movement.
The THV-5 Oval Float Switch is different because it combines a smooth curved body with a longer oval profile. It is a good option when customers want a float switch that looks cleaner, moves smoothly and fits easily into tank and pump control systems.
Why Buy THV-5 Oval Float Switch from Us?
We supply float switches for B2B customers, including distributors, pump system suppliers, equipment manufacturers and industrial project contractors.
Our advantages include:
- Stable product supply for bulk orders
- OEM customization support
- Practical product selection advice
- Export packaging available
- Support for different cable lengths and application requirements
- Suitable for water level control, pump control and equipment assembly projects
Whether you need a standard oval float switch or a customized version for your own equipment, we can help you choose the right configuration.
Ordering Information
When sending an inquiry, please provide the following details if possible:
- Required quantity
- Cable length
- Application: water tank, pump, sump, wastewater or other system
- Required contact type: normally open or normally closed
- Working voltage and current
- Liquid type and working environment
- Packaging or logo customization requirements
This information helps us recommend the most suitable THV-5 Oval Float Switch for your project.
FAQ
What is the THV-5 Oval Float Switch used for?
The THV-5 Oval Float Switch is used to detect liquid level changes and control pumps, alarms or valves. It is commonly used in water tanks, sump pumps, drainage systems and wastewater tanks.
Can the THV-5 be used for both filling and draining?
Yes. Depending on the wiring and installation position, it can be used for automatic filling control or automatic draining control.
Is the cable length customizable?
Yes. Cable length can be customized according to tank depth, control distance and project requirements.
What is the difference between an oval float switch and a rectangular float switch?
An oval float switch has a smoother rounded body, which helps it move more naturally with the liquid surface. A rectangular float switch usually has a flatter shape and may be preferred for different installation layouts.
Can the THV-5 Oval Float Switch be used in wastewater systems?
Yes, it can be used in wastewater and drainage systems if the liquid is compatible with the float body and cable material. For special liquids, material compatibility should be confirmed before ordering.
Can this float switch directly control a pump?
For small control loads, it may be used directly depending on the electrical rating. For higher-power pumps, it is recommended to connect the float switch through a relay, contactor or control panel.
Call to Action
Looking for a reliable oval float switch for tank level control or pump automation?
Contact us for THV-5 Oval Float Switch specifications, cable length options, OEM support and bulk pricing.
