1. Introduction
This manual provides instructions for the installation, operation, and maintenance of the VBESTLIFE TL-136 Liquid Level Transmitter. The TL-136 is a high-precision submersible sensor designed for continuous monitoring of water levels in various applications. Its robust construction and stable output make it suitable for demanding environments.
2. Key Features
- Input level transmitter with high diffusion silicon for accurate water level monitoring.
- All-digital conditioning circuit ensures stable 4-20mA signal output.
- IP68 multilayer waterproof protection for enhanced durability and safety.
- Features a 45-degree oblique angle anti-shock design.
- Equipped with a detachable anti-blocking design to prevent clogging.
- Constructed from 304 stainless steel, suitable for measuring water and non-corrosive liquids.
3. Specifications
| Parameter | Value |
|---|---|
| Item Type | Liquid Level Sensor |
| Tested Medium | Water (liquid that does not corrode stainless steel) |
| Guide Cable Length | 5 meters |
| Measuring Range (Optional) | 0-1m, 0-2m, 0-3m, 0-4m, 0-5m |
| Measurement Accuracy | 0.2% FS - 0.5% FS (conventional) |
| Output | 4-20mA |
| Supply Voltage | 12-32VDC |
| Medium Temperature | -20°C to 75°C |
| Ambient Temperature | -30°C to 80°C |
| Temperature Compensation | -10°C to 70°C |
| Overload Capacity | <200% |
| Protection Level | IP68 |
| Temperature Source Shift | ±0.01% FS / °C |
| Long-term Stability | ±0.2% FS / year |
| Machine Impact | 20g (20-5000HZ) |
| Product Material | 304 stainless steel |
| Probe Body Dimensions (L x D) | 108mm x 28mm |
| Package Dimensions (L x W x H) | 25cm x 20cm x 8cm |
| Package Weight | 0.574 kg |
4. Package Contents
The package includes:
- 1 x TL-136 Liquid Level Transmitter (with 5-meter guide cable)
5. Setup and Installation
5.1. Preparation
- Ensure the power supply is within the specified 12-32VDC range.
- Verify that the liquid to be measured does not corrode 304 stainless steel.
5.2. Physical Installation
- Carefully lower the sensor probe into the liquid to be measured.
- Ensure the probe body is fully submerged and positioned vertically for accurate readings.
- The air guide cable must extend above the liquid surface to allow for atmospheric pressure compensation.
- Refer to the installation diagram below for proper placement.
5.3. Electrical Wiring
- Connect the red wire of the sensor to the positive (+) terminal of your 12-32VDC power supply.
- Connect the black wire of the sensor to the negative (-) terminal of your 12-32VDC power supply and the signal input device.
- Ensure all connections are secure and properly insulated to prevent short circuits or water ingress.
6. Operation
Once installed and wired correctly, the TL-136 transmitter will continuously measure the liquid level and output a corresponding 4-20mA current signal. The 4mA output typically corresponds to the minimum measured level (e.g., 0m), and 20mA corresponds to the maximum measured level (e.g., 1m, 2m, 3m, 4m, or 5m, depending on the selected range). Connect the 4-20mA output to a compatible PLC, display, or data acquisition system for monitoring.
7. Maintenance
- Regular Inspection: Periodically check the sensor and cable for any signs of damage, corrosion, or wear.
- Cleaning: If the sensor tip becomes fouled by sediment or debris, carefully remove it from the liquid and clean it with a soft brush and clean water. Ensure the anti-blocking connector is clear.
- Cable Integrity: Ensure the guide cable is not kinked, cut, or abraded, as this can affect performance and waterproof integrity.
- Storage: If storing the sensor, clean it thoroughly and keep it in a dry, protected environment.
8. Troubleshooting
8.1. No Output or Incorrect Reading
- Check Power Supply: Ensure 12-32VDC is correctly applied to the sensor.
- Verify Wiring: Confirm the red wire is connected to positive and the black wire to negative, and that all connections are secure.
- Check for Obstructions: Ensure the sensor tip and anti-blocking connector are clear of debris.
- Sensor Placement: Make sure the sensor is fully submerged and oriented correctly.
- Compatibility: Ensure the receiving device (PLC, display) is configured to read a 4-20mA signal.
8.2. Unstable Output
- Check for Liquid Turbulence: Excessive movement in the liquid can cause fluctuations in readings.
- Grounding Issues: Ensure proper grounding of the system to prevent electrical noise.
- Electrical Interference: Keep sensor wiring away from high-power cables or sources of strong electromagnetic interference.
9. User Tips
- Range Selection: When choosing a sensor, select a measuring range that is slightly greater than the maximum expected liquid depth to avoid exceeding the sensor's limits. For example, for a 1.6m deep tank, a 0-2m range sensor would be appropriate.
- Liquid Compatibility: This sensor is designed for water and non-corrosive liquids. Do NOT use it with corrosive chemicals or fuels like diesel, as this can damage the stainless steel housing and internal components.
- Arduino Integration: To interface this 4-20mA output sensor with an Arduino, you will need an external current-to-voltage converter circuit or an analog-to-digital converter (ADC) module capable of reading 4-20mA signals. Direct connection to Arduino analog pins is not possible without conversion.
- Cable Length: The standard cable length is 5 meters. There are no options for longer cables (e.g., 10m) directly from the manufacturer for this model.
10. Frequently Asked Questions (FAQ)
- Q: What type of liquids can this sensor measure?
- A: This sensor is designed for measuring water and other liquids that do not corrode 304 stainless steel.
- Q: What are the available measuring ranges for the TL-136?
- A: The TL-136 is available in several measuring ranges: 0-1m, 0-2m, 0-3m, 0-4m, and 0-5m.
- Q: What is the output signal of this sensor?
- A: The sensor provides a standard 4-20mA current output signal.
- Q: What is the required power supply voltage?
- A: The sensor operates on a DC supply voltage between 12V and 32V.
- Q: Can I get this sensor with a longer cable, for example, 10 meters?
- A: No, all available variants of this sensor come with a fixed 5-meter guide cable.
11. Warranty and Support
This product comes with a standard manufacturer's warranty against defects in materials and workmanship. Please refer to your purchase documentation for specific warranty terms and duration.
For technical support or warranty claims, please contact the seller or manufacturer directly through the platform where the product was purchased.
