ZP Ultrasonic Level Transmitter: Non-Contact Level Measurement for Medium to Long Ranges
Introduction
The ZP is a digital ultrasonic level transmitter designed for measurement ranges up to 15 meters, making it suitable for tanks, silos, reservoirs, and open channels. It delivers a measurement accuracy of approximately ±0.3% FS, positioning it above entry-level ultrasonic devices in terms of performance while still maintaining practical usability.
Depending on the selected range, the device includes a blind zone between 0.4 m and 0.6 m, which is typical for ultrasonic sensors in this measurement class. The transmitter supports multiple output options—including 4–20 mA, RS485, voltage signals, and relay outputs—allowing flexible integration into both simple control loops and more advanced automation systems.
Additionally, the system allows custom scaling of output ranges, configurable measurement modes (level or distance), and adjustable signal emission strength, making it adaptable to real-world process conditions rather than fixed laboratory setups.
Working theory
The ZP operates based on ultrasonic pulse reflection, with additional digital processing to improve stability and adaptability.
The sensor emits ultrasonic waves toward the material surface. Once the signal reflects, the device calculates the distance using the time taken for the echo to return:
Distance = (Speed of sound × Time) / 2
The system then converts this distance into a level value based on user-defined reference points.
What differentiates the ZP ultrasonic level transmitter is not just the measurement principle, but how flexibly it applies it:
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The output range can be freely mapped to process requirements
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Measurement can switch between distance and level modes
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Signal strength (emission pulse intensity) can be tuned to match surface conditions
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Built-in automatic temperature compensation improves accuracy in changing environments
This makes the device more tolerant of real industrial conditions, such as uneven surfaces or variable environmental factors.
Key features
The ZP ultrasonic liquid level transmitter is built around adaptability, signal flexibility, and stable field performance, rather than just basic level measurement.
- Wide Measurement Range (Up to 15 m): Covers multiple range options (5 m, 10 m, 15 m), making it suitable for both medium and relatively large tanks.
- Higher Measurement Accuracy (±0.3% FS): Provides more precise readings compared to standard ultrasonic transmitters in similar categories.
- Flexible Output and Communication Options: Supports 4–20 mA, RS485 (Modbus), voltage outputs, and relay outputs, enabling integration across different system architectures.
- Custom Output Scaling and Measurement Modes: Allows users to define output start/end points and switch between level and distance measurement for different process needs.
- Adjustable Emission Intensity for Signal Optimization: Multi-level pulse strength improves echo detection under varying surface or environmental conditions.
- OLED Display with Local Configuration: Provides a clear on-site indication and supports parameter adjustment directly on the device.
- Robust Industrial Design: Low power consumption (<1.5W), multiple power supply options (DC/AC), and IP65/IP68 protection ensure stable long-term operation.
Specification
| Product | Ultrasonic level transmitter |
| Model | ZP |
| Measure range | 5、10、15m |
| Blind zone | ＜0.4-0.6m（different for range） |
| Accuracy | 0.5%F.S |
| Display | OLED |
| Output (optional) | 4～20mA RL>600Ω（standard） |
| RS485 | |
| 2 relays (AC: 5A 250V DC: 10A 24V) | |
| Material | ABS, PP |
| Electrical interface | M20X1.5 |
| Power supply | 12-24VDC, 18-28VDC (two-wire), 220VAC |
| Power consumption | <1.5W |
| Protection degree | IP65(others optional) |
Applications
The ZP ultrasonic level transmitter is suitable for multi-scenario industrial environments, especially where flexibility and non-contact measurement are required.
Water and wastewater systems
Level monitoring in tanks, wells, reservoirs, and open channels of various water and wastewater treatment projects.
Chemical storage and processing
Suitable for solvents, slurries, and reactive liquids where non-contact measurement improves reliability.
Food and liquid processing industries
Used for edible oils, sauces, and beverages where hygiene and non-contact operation are important.
Bulk solids and agricultural storage
Applicable for grains, flour, and other granular materials in silos or bins.
General industrial tanks and utilities
Supports a wide range of process monitoring needs with flexible configuration.
