The THV-2 Rectangular Float Level Switch is a compact cable float switch designed for automatic liquid level control in water tanks, sump pits, sewage systems, drainage tanks and pump control applications.
Instead of using a complicated level control system, THV-2 provides a simple ON/OFF signal when the liquid rises or falls to the set level. It helps pumps start, stop or trigger an alarm at the right time, reducing the risk of overflow, dry running and unnecessary manual operation.
With a rectangular floating body, waterproof cable connection and durable plastic housing, THV-2 is a practical choice for projects that need easy installation, stable switching and cost-effective liquid level protection.
Built for Simple, Reliable Level Control
In many water and wastewater systems, the level control device does not need to be complex. It needs to be stable, waterproof and easy to install. That is exactly where the THV-2 rectangular float switch works well.
The switch is suspended by its cable inside a tank, pit or container. As the liquid level changes, the float body rises or falls. When the float reaches the operating angle, the internal contact changes state and sends an electrical signal to the pump, control panel or alarm system.
This simple mechanical action makes THV-2 suitable for many daily and industrial liquid level control jobs.
Why Choose a Rectangular Float Switch?
The rectangular shape gives THV-2 a clean, balanced floating structure. It is easy to position inside tanks and is suitable for general pump control, water level detection and overflow protection.
For buyers who are looking for a standard water level controller float switch, the THV-2 model offers a practical balance between size, cost and reliability.
Key advantages of the THV-2 design:
- Rectangular floating body for stable movement in water and compatible liquids
- Cable-suspended installation without complicated mounting brackets
- ON/OFF switching output for pump start, pump stop or level alarm
- Waterproof structure suitable for wet and submerged environments
- Available with different cable lengths for different tank depths
- Suitable for water tanks, sump pumps, sewage pits and drainage systems
- Easy to connect with pumps, relays, contactors or control panels
Main Applications
The THV-2 cable float level switch is widely used in systems where liquid level needs to be detected and controlled automatically.
Water Tank Level Control
THV-2 can be installed inside storage tanks to control water filling or draining. When the water reaches the required level, the switch sends a signal to start or stop the pump.
Sump Pump Control
For basements, drainage pits and collection wells, THV-2 helps activate the pump when the water rises and stop it after the level drops.
Sewage and Wastewater Systems
The waterproof float body allows THV-2 to be used in sewage tanks, wastewater pits and drainage stations. It helps maintain proper liquid levels and reduces the need for manual checking.
Industrial Liquid Containers
THV-2 can also be used for general liquid level detection in industrial tanks, process containers and equipment water systems, depending on liquid compatibility.
Overflow and Dry-Run Protection
By setting the float switch at a high or low level point, THV-2 can help prevent overflow or protect pumps from running without enough liquid.
Typical Technical Specifications
| Item | THV-2 Rectangular Float Level Switch |
| Product Type | Cable float level switch / water level controller |
| Model | THV-2 |
| Float Shape | Rectangular |
| Output Signal | ON/OFF switching signal |
| Installation | Cable suspended |
| Body Material | PP / PPC plastic, depending on order requirement |
| Protection Grade | IP68 |
| Rated Voltage | AC 110V / 220V options available |
| Rated Current | 10A / 16A options available |
| Operating Temperature | 0–60°C |
| Cable Length | 1m, 2m, 3m, 4m, 5m, 10m, 15m, 20m or customized |
| Cable Type | PVC / rubber cable options available |
| Contact Function | Pump filling, draining or alarm control |
| Certification | CE available |
| Suitable Media | Clean water, wastewater, weak acid/alkaline solution and selected oils; please confirm compatibility before use |
Note: Specifications can be adjusted according to project requirements. For OEM orders, cable length, cable type, color, rating and packaging can be customized.
How the THV-2 Float Switch Works
The THV-2 float switch works by converting liquid level movement into an electrical switching signal.
When the liquid level rises, the rectangular float body moves upward. When it reaches the preset angle, the internal switching component changes contact status. The signal can then be used to start or stop a pump, open or close a control circuit, or activate a warning alarm.
When the liquid level drops, the float returns to its original position and the contact state changes again.
This makes THV-2 a simple but effective device for automatic liquid level control.
THV-2 for Pump Start and Stop Control
One of the most common uses of THV-2 is pump automation.
For filling applications, the float switch can stop the pump when the tank is full and restart filling when the level drops. For draining applications, it can start the pump when the water rises and stop the pump when the water has been discharged.
This helps save labor, improves system safety and keeps the pump working only when needed.
Product Features
1. IP68 Waterproof Body
THV-2 is designed for use in wet and submerged environments. The sealed float body helps protect the internal switching structure from water ingress.
2. Easy Cable-Suspended Installation
No complicated bracket or threaded connection is required. The switch can be installed by fixing the cable at the correct height and adjusting the operating range according to the tank depth.
3. Stable ON/OFF Signal Output
THV-2 provides a clear switching signal for pump control, liquid level alarm or automatic filling and draining systems.
4. Cost-Effective Level Control Solution
Compared with more complex level transmitters, a cable float switch is easier to use and more economical for basic high/low level control.
5. Custom Cable Lengths
Different tank depths require different cable lengths. THV-2 can be supplied with standard or customized cable lengths for project use.
6. Suitable for OEM and Bulk Orders
For distributors, pump manufacturers and equipment suppliers, THV-2 can be customized with logo, packaging, cable length and electrical rating according to order requirements.
Recommended Use Scenarios
Choose the THV-2 rectangular float switch if your project needs:
- A simple float switch for water tank level control
- A pump float switch for automatic filling or draining
- A waterproof float switch for sump pump systems
- A low-cost level switch for sewage or wastewater tanks
- A rectangular water level controller with custom cable length
- A reliable ON/OFF signal for control panels and pump systems
Installation Tips
For better performance, please pay attention to the following points during installation:
- Make sure the float has enough space to move freely.
- Avoid placing the float near strong water flow, sharp edges or moving mechanical parts.
- Do not immerse cable joints in water.
- Select a cable length suitable for the tank depth.
- Use a relay or contactor when controlling high-power pumps.
- Confirm the liquid temperature and chemical compatibility before use.
- Test the switch action before long-term operation.
THV-2 vs. General Float Switches
Many float switches can perform basic level control, but THV-2 is especially suitable for buyers who need a rectangular cable float switch with simple installation, stable waterproof performance and flexible cable options.
It is not designed to replace precision level transmitters. Instead, it is made for practical ON/OFF control where the goal is simple: detect the liquid level and control the pump or alarm reliably.
For many tanks, pits and drainage systems, that is exactly what is needed.
Why Work With Us
We supply float level switches for water control, pump automation and industrial liquid level applications. Whether you need standard THV-2 models or customized cable float switches, we can support bulk orders, OEM packaging and project-based specifications.
What we can provide:
- THV-2 rectangular float level switch
- THV-1 triangular cable float switch
- Other float switch models for pump control
- Custom cable length and cable material
- OEM logo and packaging service
- Export-ready packing for bulk orders
- Technical support for product selection
If you are sourcing float switches for water pumps, tanks, sewage systems or equipment manufacturing, THV-2 is a reliable and practical option.
FAQ
What is the THV-2 Rectangular Float Level Switch used for?
THV-2 is used for automatic liquid level control. It can start or stop pumps, trigger alarms, and help prevent overflow or dry running in tanks, sump pits and wastewater systems.
Can THV-2 be used for both filling and draining?
Yes. Depending on the wiring and installation method, THV-2 can be used for pump filling control or pump draining control.
Is the THV-2 float switch waterproof?
Yes. THV-2 is designed with an IP68 waterproof structure, making it suitable for wet and submerged applications.
What cable length is available?
Common cable lengths include 1m, 2m, 3m, 4m, 5m, 10m, 15m and 20m. Custom cable lengths can also be supplied according to order requirements.
Can THV-2 control a pump directly?
For small loads, direct control may be possible depending on the electrical rating. For larger pumps, it is recommended to use the float switch with a relay or contactor for safer operation.
What liquids can THV-2 be used with?
THV-2 is commonly used with clean water, wastewater and some weak acid or alkaline solutions. For oil, chemical liquids or special media, please confirm material compatibility before ordering.
Looking for a practical rectangular float switch for water tank or pump control?
Contact us for THV-2 specifications, cable length options, OEM packaging and bulk order pricing. We can help you choose the right float level switch for your tank, pump or wastewater control system.
