Ultrasonic level sensor is a non-contact monitor designed for real-time water level tracking. Powered by DC 5V, it works reliably in temperatures from -10℃ to 70℃ with a practical measuring range of 0.1m to 2.9m. Supports RS485 and 433MHz signal transmission. The durable Nylon probe with a standard threaded interface enables quick installation.
Core Detection & Local Display
- Precise On-site Display: The wall-mounted LCD screen shows water level percentage (10%-100%), water temperature, liquid level height, and 24-hour time. Physical buttons support power control and parameter setup. Data syncs automatically after one-time mobile phone configuration.
- Non-contact Ultrasonic Detection: This ultrasonic level sensor uses a 20KHz+ ultrasonic sensor mounted on the tank top without touching water, protecting water quality with 1cm high accuracy.
- Dual Transmission Options: Wired cable and wireless WiFi are both available. Real-time data syncs between the display panel and mobile APP for on-site or remote monitoring.
Intelligent Alarm, Linkage & Durability
- Custom Multi-scenario Alarms: Set upper-limit overflow alerts, lower-limit water shortage alerts, or customized threshold alerts on the APP. Pop-up notifications remind users of abnormal liquid levels instantly.
- Automatic Pump Linkage Control: Paired with a Tuya smart socket and external pump, the system works unattended. The ultrasonic level sensor auto-fills water at low levels and stops at the high limit; in drainage mode, it pumps out water at high levels and stops at the preset low level.
- Waterproof and Low-maintenance Structure: The ultrasonic level sensor comes with a waterproof probe, cables, and connectors that resist sunlight and rain. Please note the probe shall not be permanently submerged in water. Only minimal maintenance is required after one-time installation.
Applications
This ultrasonic level sensor is widely applied in water level monitoring for municipal engineering, agricultural irrigation, food fermentation, fire protection systems, RVs and vessels, as well as industrial automation. It also perfectly fits the measurement and real-time supervision of water tanks, water containers, and water pools of various types.
Plastic Water Tower
Vertical Stainless Steel Tank
Decorative Water Pool
Metal Water Tank
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| Model | SISCO-ULT-TLC2502LS |
| Power Supply | DC 5V/2A |
| Operating Current | ＜150mA |
| Operating Frequency | 40kHz |
| Operating Temperature | -10℃ ~ 70℃ |
| Probe Material | Nylon |
| Probe Thread Diameter | 59.7mm |
| Installation Method | Mount on flat surface with the sensor pointing vertically downward |
| Blind Zone Distance | 0.1m (10cm) |
| Measuring Range | 0.1m – 2.9m |
| Communication Mode | WiFi |
| Measurement Error | ±1% or ±1cm (whichever is larger) |
| Cable Length | 3m, extension cables in 3m/5m/15m are available for separate purchase |
| Supported APP | TUYA Smart APP / Smart Life APP |
Dimensions (unit: mm)
Plug
Q1: What is the measuring range of this ultrasonic level sensor?
A1: This ultrasonic level sensor has a 0.1 m to 2.9 m measuring range for non-contact water level monitoring. The range is suitable for water tanks, reservoirs, and storage containers, while the 10 cm blind zone needs to be considered during installation.
Q2: Does the ultrasonic level sensor require a probe inside the water?
A2: No, the ultrasonic level sensor does not require a probe inside the water. The sensor is installed above the water surface and uses ultrasonic waves to measure the distance to the liquid. This non-contact design reduces direct exposure to the liquid and simplifies maintenance.
Q3: What frequency does this ultrasonic water level sensor use?
A3: This ultrasonic water level sensor operates at 40 kHz, using ultrasonic waves to measure the distance between the sensor and the water surface. The 40 kHz operating frequency supports non-contact water level detection for applications such as water tanks, reservoirs, and storage systems.
Tips: How far should the ultrasonic level sensor be from the water surface?
The ultrasonic level sensor should be installed at least 0.1 m (10 cm) above the highest expected water level to stay outside the sensor’s blind zone. Installing the sensor vertically above the water surface with a clear measurement path helps ensure stable and reliable water level readings.
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