Compact Level Switch Application Case – Ring-21 Tuning Fork Level Switch
In modern industrial and equipment management, level monitoring is a crucial part of ensuring equipment safety and stable operation. For general liquid storage applications such as water tanks, oil tanks, and coolant reservoirs, the accuracy and reliability of level switches directly affect equipment efficiency and maintenance convenience. Traditional large-scale level instruments are often costly and complex to install under such simple conditions, while compact level switches offer advantages such as small size, low cost, and easy installation, making them an ideal choice for economical level control solutions.
Among many compact level switches, the Jiwei Ring-21 compact tuning fork level switch stands out for its short fork design and LED status indicator. With a fork length of only 38mm, it enables level monitoring even in small water tanks or equipment tops. The high-brightness LED indicator clearly shows the liquid level status, allowing operators to monitor levels without additional displays. Additionally, Ring-21 features corrosion-resistant stainless steel construction and a robust housing, suitable for long-term operation in general industrial liquid storage conditions.

Technical Features of Ring-21 Compact Level Switch
Compact Design for Small Tanks
The 38mm fork length allows easy installation in small water tanks, oil tanks, coolant reservoirs, or piping systems, saving space and reducing retrofit costs.
LED Status Indicator for Intuitive Operation
The LED indicator lights up when the liquid reaches the preset level, enabling operators to quickly assess the liquid status and avoid manual inspections or operational errors.
High Sensitivity for Water and General Oil
Ring-21 is suitable for general liquids such as water, light oil, and low-corrosion fluids. Its fast response ensures timely activation of pumps, valves, or alarms, preventing overflow or dry-running conditions.
Durable and Low-Maintenance
Constructed with 316L stainless steel and IP66/67 protection, Ring-21 can operate long-term in indoor or mildly outdoor environments, resisting oxidation, water, and dust. Longer maintenance intervals reduce downtime and operational disruption.
Easy Installation with Multiple Options
Available with threaded or flange installation, Ring-21 can be quickly integrated into existing equipment or piping systems without major modifications, making it ideal for economical level control solutions.
Multi-Scenario Application Cases
1. Industrial Water Tank Level Monitoring
Stable water levels directly impact pump operation and equipment cooling efficiency. Ring-21 installed on the tank top triggers drainage valves or pump stops at high levels to prevent overflow and activates supply pumps at low levels to ensure continuous operation.
2. Coolant Reservoir Level Control
In machinery or HVAC systems, coolant reservoirs require continuous monitoring. Ring-21 detects point levels at the tank top and controls circulation pumps or alarms via LED indicators and relay output for automated refilling and overflow protection.
3. Industrial Lubrication Oil Tank Monitoring
Low lubrication levels can lead to mechanical wear and downtime. With Ring-21, operators can visually monitor oil levels via LED; when reaching low levels, the switch triggers pumps to refill automatically, reducing manual inspection and increasing equipment reliability.
4. General Liquid Tank Alarm
For simple storage tanks containing water, cleaning liquids, or low-corrosion fluids, Ring-21 provides high/low level alarms. Its compact size allows quick installation in limited space, achieving point-level control and reducing investment costs.

Summary of Ring-21 Advantages
| Feature | Advantage |
|---|---|
| Fork length 38mm | Compact design for small tanks or equipment installation |
| LED status indicator | Visual liquid level monitoring, reducing manual checks |
| 316L stainless steel | Resistant to general corrosive liquids, waterproof, dustproof, suitable for simple industrial conditions |
| High sensitivity | Rapid response to trigger pumps, valves, or alarms |
| Multiple installation options | Threaded or flange for flexible, fast integration |
| High reliability | Long service life, low maintenance costs, ideal for economical level control |
Ring-21 compact level switch combines economical cost, easy installation, and reliable operation, meeting basic level monitoring needs under general conditions. It is an ideal point-level solution for industrial water tanks, oil tanks, and coolant reservoirs.
Shenzhen Jiwei – Reliable Choice for Economical Level Switches
Shenzhen Jiwei (Jiwei Automations), a national high-tech enterprise, has long focused on the R&D and manufacturing of level and point level measurement instruments. The company has received multiple government R&D grants, demonstrating its strong technical innovation capabilities. Jiwei’s product range covers compact economical level switches, vibrating rod level switches, and radar level meters, suitable for various industrial liquid storage and simple operating conditions. As a representative economical level switch, Ring-21 offers easy installation, low cost, and minimal maintenance, providing enterprises with a high cost-performance domestic alternative while reflecting Jiwei’s robust R&D and innovation strength.
