Ultrasonic Level Transmitter

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Ultrasonic Level Transmitter

Feature Description
Non-contact Measurement Ensures safe and contamination-free operation
Low Maintenance Minimal servicing required due to no moving parts
Versatile Application Suitable for various types of liquids
Easy Installation Simple setup and commissioning process
Cost-effective Provides economical solution for level measurement
Reliable & Accurate Delivers consistent and precise measurement results

Key Features

Non-Contact Measurement Technology
• Uses ultrasonic sound waves for level measurement
• No direct contact with medium
• Ideal for corrosive, toxic, or sticky liquids
Wide Measuring Range
• Measures from a few centimeters up to several meters
• Typical range: 0.3 m to 15 m or more (model dependent)
High Accuracy & Stability
• Accuracy up to ±0.25% to ±0.5% of full scale
• Ensures reliable and consistent process control
Temperature Compensation
• Built-in sensor adjusts for sound velocity changes
• Improves measurement accuracy
Easy Installation & Configuration
• Compact design with top mounting
• Configuration via keypad, HART, or display interface
Low Maintenance Design
• No moving parts reduces wear
• Non-contact operation minimizes maintenance
Multiple Output Options
• Supports 4–20 mA, HART, and relay outputs
• Suitable for alarms and control systems
Advanced Signal Processing
• Filters false echoes from foam, vapors, or obstructions
• Ensures stable and accurate readings
Versatile Applications
• Suitable for tanks, reservoirs, and open channels
• Ideal for wastewater treatment systems
Rugged Industrial Design
• Available in IP65 / IP67 and explosion-proof enclosures
• Designed for harsh industrial environments

Working Principle

An ultrasonic level transmitter works on the time-of-flight principle using high-frequency sound waves.
1. Ultrasonic Pulse Emission The transmitter emits ultrasonic sound waves (typically 20–200 kHz) from the sensor towards the liquid surface.
2. Wave Reflection The sound waves travel through the air, hit the liquid surface, and get reflected back to the sensor.
3. Echo Reception The sensor receives the reflected echo signal.
4. Time Measurement The device measures the time taken for the pulse to travel to the surface and return (round-trip time).
5. Distance Calculation Based on the speed of sound, the distance is calculated using: Distance = (Speed of Sound × Time) / 2
6. Level Determination The transmitter subtracts the measured distance from the total tank height to determine the liquid level.
7. Output Signal Generation The calculated level is converted into standard output signals like 4–20 mA, HART, or digital display for monitoring and control.

Industrial Applications

Water & Wastewater Treatment Plants
• Level measurement in tanks, reservoirs, lift stations, and open channels
Chemical Industry
• Suitable for corrosive and hazardous liquids in storage and process tanks
Oil & Gas Industry
• Non-contact level measurement of fuels, oils, and chemicals in storage tanks
Food & Beverage Industry
• Used in hygienic applications like water tanks, syrups, and liquid storage
Pharmaceutical Industry
• Ideal for clean and sterile environments requiring non-contact measurement
Power Plants
• Level monitoring in cooling water tanks and auxiliary systems
Cement & Bulk Material Industry
• Level measurement of powders and granules in silos
Pulp & Paper Industry
• Applied in chemical tanks and water level monitoring
Mining Industry
• Used for slurry tanks and water level measurement
Open Channel Flow Measurement
• Used with weirs and flumes for flow measurement in canals and effluent systems

Technical Specifications

Parameter Specification
Measured Liquid Water, fuel, oil, and other non-corrosive or corrosive fluids
Measuring Range 2m, 5m, 8m, 10m, 12m, 15m, 20m, 25m, 30m, 35m, 40m (mm unit available)
Dead Zone < 0.25 ~ 2 m
Beam Angle < 10°
Resolution 1 mm
Operating Frequency 20 KHz ~ 2000 KHz
Accuracy ±0.25% F.S.
Display LED / LCD / OLED (English Menu)
Output Signal 4–20 mA / 0–5 V / 0–10 V / RS485 / HART / Relays
Power Supply DC 12–28 V / AC 220 V
Process Connection G1 1/2" (2m range)
M60×2 (5m–15m range)
DN80 Flange (20m–40m range)
Cable Gland M20 × 1.5
Housing Material ABS (standard) / Aluminum / SS304 (customized)
Transducer Material ABS (standard) / PP / PTFE / PVDF (customized)
Protection Grade IP65 / IP68

Model Selection Table

Parameter Specification
Model SSFLOW_ULT
Measuring Range 5 / 8 / 10 / 15 / 20 / Others (Please Mention)
Power Supply 1 – 24V DC / 2 – 230V AC
Output 1 – 4 to 20mA
2 – Relay
3 – 4 to 20mA + HART / RS485
Display 1 – Integral
2 – Remote
Explosion Proof 1 – Yes
2 – No