Ultrasonic level transmitter TU2000

for solidsfor waterfor liquids

Product Overview
The TU2000 is an ultrasonic level transmitter for non-contact measurement of distance, level and volume. Based on acoustic Time of Flight (ToF) at 33 kHz, it provides reliable measurements up to 20 meters in liquids, solids and grains, in static and moving media. Bluetooth configuration via the SigNow app enables guided commissioning, echo-graph diagnostics and firmware updates.

Why Choose the TU2000
Non-contact measurement reduces wear and eliminates corrosion risks associated with contact sensors. Readings are unaffected by smoke, color or surface reflectivity. Built-in temperature compensation on the sensing surface maintains stable accuracy across temperature variations, while Bluetooth access simplifies setup and troubleshooting.

Main Features

• Measuring principle: ultrasonic ToF (Acoustic ToF, 33 kHz)
• Range: up to 20 m (20,000 mm)
• Interface: Bluetooth configuration via SigNow app (mobile and PC) with guided wizard, echo graph and firmware updates
• Accuracy: min. 30 mm, max. 2 mm
• Resolution: 1 mm
• Operating temperature: -20 to 80 °C
• Protection: IP67
• Analog output: 4–20 mA (NAMUR NE43), 0.01 mA resolution
• Digital/alarm output: configurable PNP or NPN, up to 200 mA
• Connector: internal terminals with cable gland

Main Applications

• Grain and solids silos
• Industrial tanks of various shapes (cylindrical, vertical, horizontal, irregular)
• Water and wastewater treatment plants
• Level monitoring for rivers and dams

Advantages of a Non-Intrusive Sensor
By avoiding direct contact with the process material, the TU2000 reduces maintenance and risk of damage, provides stable readings under agitation or turbulence, and simplifies integration into automation systems via standard 4–20 mA and configurable PNP/NPN outputs.

Additional Notes
PNP or NPN digital output can directly switch relays and signaling devices to facilitate integration and reduce downtime. Visual diagnostics include 4 LEDs per NAMUR NE107 for quick status checks.

Characteristics / technical specifications

• Measuring principle: Acoustic ToF (ultrasound, 33 kHz)
• Measuring range: up to 20,000 mm
• Measured quantities: Distance, level, volume
• Measured product types: Static and moving fluids; liquids, solids, grains
• Accuracy: min. 30 mm, max. 2 mm
• Resolution: 1 mm
• Blind zone: 500 mm (reducible to ~250 mm in tanks ≤ 10,000 mm)
• Sampling rate: 1 Hz (2 Hz in tanks ≤ 10,000 mm)
• Linearization: up to 20 points for irregular tank geometry
• Configuration: SigNow app via Bluetooth (BLE 4.0+)
• Visual indication: 4 LEDs (Status, Analog Output, Digital Output, Bluetooth) per NAMUR NE107
• Connector: Internal terminals with cable gland
• Power supply: 8–33 Vdc (internal reverse polarity protection)
• Operating temperature: -20 to 80 °C
• Analog output: 4–20 mA (NAMUR NE43), 0.01 mA resolution
• Digital/alarm output: configurable PNP or NPN, up to 200 mA
• Regulatory compliance: CE Mark
• Degree of protection: IP67
• Process pressure: up to 2 bar
• Housing: UL94 polycarbonate
• Mounting: Ø32 mm flange and hexagonal acoustic horn
• Warranty: 3 years