Description
This split-type ultrasonic level sensor is a non-contact measuring device designed for accurate and reliable distance or liquid level monitoring. Suitable for a wide range of industrial scenarios, ultrasonic level detector combines advanced ultrasonic technology with user-friendly features to deliver stable performance even in demanding conditions. Below are its key specifications and characteristics.
Specification
| Model | ATO-FK-ULS-B |
| Measuring Variable | Distance / Level |
| Power Supply | (100–240)VAC, 5W Max, 50/60Hz or (18–28)VDC |
| Measuring Range | (0–5)m, (0–10)m, (0–15)m (optional) |
| Accuracy | ±0.3%FS, ±0.5%FS |
| Blind Zone | ≤0.3m (5m); ≤0.35m (10m); ≤0.5m (15m) |
| Display Resolution | 1mm or 0.1%FS (whichever is larger) |
| Display | Monochrome LCD, 128×64 resolution |
| Current Output | Isolated (4–20)mA, max load 500Ω, accuracy ±0.2%FS |
| Communication | Isolated RS485, Modbus-RTU protocol |
| Alarm Output | 2 channels (standard), up to 4 channels optional, capacity AC250V/3A |
| Operating Temperature | Transmitter: -20°C to +60°C; Probe: -20°C to +80°C |
| Protection Rating | Transmitter: IP65; Probe: IP68 |
| Probe Cable | 10m (standard), optionally up to 30m |
| Ambient Humidity | 10%–85% RH (non-condensing) |
| Language | Chinese / English |
| Mounting | Wall-mounted |
Error Code Table
| Error Code | Description |
| ERR1 | Storage unit abnormal, data write failed |
| ERR2 | Temperature sensor abnormal or not connected |
| ERR3 | Ultrasonic probe abnormal or not connected |
| ERR4 | Product not calibrated |
| ERR5 | Calibration data abnormal |
| ERR6 | Configuration data abnormal |
| ERR7 | Selection data abnormal |
| ERR8 | Ultrasonic wave emission time abnormal |
| ERR9 | Circuit board connection abnormal |
| ERR10 | Serial port data transmission abnormal |
Feature
- Automatic Temperature Compensation: The level sensor adjusts sound velocity based on temperature to improve measurement accuracy.
- Adaptive Smart Probe: The ultrasonic liquid level sensor utilizes multi-point emission to reduce errors from single-point transmission.
- High Resolution & Fast Response: Ultrasonic level sensor offers a measurement resolution of 3mm and response time as fast as 2 seconds.
- Self-Diagnostic Function: The ultrasonic liquid level detector displays error codes for quick troubleshooting and maintenance.
- User-Friendly Interface: The ultrasonic level sensor is equipped with a high-definition LCD and four-button touch panel supporting Chinese/English menus.
- Durable Design: Ultrasonic level detector features IP65 (transmitter) and IP68 (probe) protection for reliable performance in harsh environments.
Dimension (Unit: mm)
Wiring Diagram
Split-Type Port Wiring Diagram (220V AC Power Supply)
Split-Type Port Wiring Diagram (24V DC Power Supply)
Application
Tips: What is Working Principle of Split-type Ultrasonic Level Sensor?
The split-type ultrasonic level sensor operates on the time-of-flight (TOF) principle, which measures the time taken for an ultrasonic pulse to travel from the transducer to the material surface and back. The sensor’s probe, typically mounted at the top of the tank or vessel, emits high-frequency sound waves. These waves travel through the air or gas above the material until they hit the surface and are reflected back to the probe.
The level sensor’s electronics precisely calculate the round-trip time of the ultrasonic pulse. Using the known speed of sound under current environmental conditions, the distance to the material surface is determined by the formula: Distance = (Speed of Sound × Time of Flight) / 2. This calculated distance is then converted into a level value based on the installation height of the probe.
A key feature of modern ultrasonic liquid level sensor is automatic temperature compensation. Since the speed of sound varies with temperature, an integrated temperature sensor adjusts the sound velocity value in real time to ensure measurement accuracy. This compensation is especially important in applications with significant temperature fluctuations.
The split-type design separates the transducer from the signal processing and display unit. This allows the ultrasonic level sensorprobe to be installed in harsh or confined environments—often with high IP ratings for dust and water resistance—while the electronics enclosure can be placed in a more accessible location for configuration and maintenance. Communication is typically facilitated via analog 4–20 mA outputs or digital interfaces such as RS485 with Modbus protocol, enabling integration into industrial control and monitoring systems.
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