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T023A TNU

Product catalog summary

Description
The TNU Ultrasonic Snow Level Sensors are designed to measure snow levels up to 4 or 8 meters, depending on the model (TNU04 or TNU08). They operate by emitting ultrasonic pulses towards the snow surface and receiving the reflected waves. The sensors feature self-correction for air temperature variations, ensuring accurate measurements. The system includes an integrated temperature sensor and an amplification system tailored for snow's sound-absorbing properties. A protective, self-ventilated solar shading houses the transducer, safeguarding it from weather conditions.

Main Features

Sound electronic filtering
Compact and affordable design
Self-correction for air temperature compensation
Equipped with self-ventilated solar shading

Technical Specifications
Measurement Performance

Distance: TNU04 (0.6 to 4 m), TNU08 (0.8 to 8 m)
Accuracy: ± 1 cm
Resolution: 0.5 cm
Beam width: 12° ± 2°

Operating Conditions

Temperature: -20°C to +65°C
Humidity: 0% to 100%

Outputs

RS485-Modbus: Temperature, Snow Level
Tension: 0 to 2 V ↔ 0 to 5 m (TNU04), 0 to 10 m (TNU08)
Current: 4 to 20 mA ↔ 0 to 5 m (TNU04), 0 to 10 m (TNU08)

Power Supply and Consumption

Voltage supply: 10 to 16 Vdc
Consumption: RS485 Modbus/0 to 2 V (TNU04) - 1 mA, (TNU08) - 1.5 mA
4 to 20 mA: 7 to 30 mA
Capsule piloting power (peak): 14.4 W

Mechanical Specifications

Protective body: Plastic (ABS), aluminium, stainless steel screws
Weight: TNU04 - 1.6 kg, TNU08 - 2.3 kg
Dimensions: TNU04 - Ø 210 mm, Height 323 mm; TNU08 - Ø 210 mm, Height 390 mm
Electrical connections: IP67 / 7 male poles

Ordering Codes

TNU04: Range 0 to 4 m, Current output, Tension output, RS485-Modbus serial output - t023a-TNU04-IVS
TNU08: Range 0 to 8 m, Current output, Tension output, RS485-Modbus serial output - t023b-TNU08-IVS

Catalog excerpts

Environmental Monitoring Solutions Since 1925 Sound electronic filtering Self-correction of the measurement for compensation of the air temperature Compact and affordable

Open the catalog to page 1

TNU sensors capture snow level up to either 4 or 8 meters, according to the model in use (TNU04, TNU08). Functioning system is related to the emission of short ultrasonic frequency pulses towards the depth of snow to investigate and to the subsequent reception of the reflected wave, generated once the pulses reach the surface the snow is lying on. It ensures excellent performance for what concerns accuracy, thanks to a system of self-correction of the level measurement. Indeed, by means of an integrated temperature sensor, it can easily take into account the variation of the sound speed as a...

Open the catalog to page 2

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