Ultrasonic Level Sensor

Manufacturer: HMW
SonicSens 3 is an intrinsically safe ultrasonic level sensor designed for wastewater and sewer network monitoring. Using intelligent ultrasonic technology, the sensor delivers highly accurate level measurements without making contact with the medium, reducing contamination risk and minimising maintenance requirements. SonicSens 3 is ideal for Combined Sewer Overflow (CSO) Event Duration Monitoring, surcharge detection and incident prevention. It records event occurrence, time and duration, supporting regulatory compliance and proactive network management. ATEX (Zone 0) certified, SonicSens 3 is suitable for hazardous environments. When paired with the ATEX Battery Pack, it supports accelerated sampling and increased dial-in frequency while maintaining up to five years of battery life.
Description

Key Features

  • Non-contact ultrasonic measurement

  • Intrinsically safe – ATEX Zone 0 certified

  • AutoRanging configuration

  • Built-in temperature compensation

  • IP68 fully submersible

  • Advanced unwanted echo filtering

  • Compatible with HWM telemetry data loggers

  • 5-year battery life at 15-minute sample rate

  • Accelerated sampling during alarm conditions

 

Technical Specifications

 

Ultrasonic Measurement

AutoRanging options:

  • 150 mm – 1 m

  • 200 mm – 3 m

  • 300 mm – 6 m

  • 300 mm – 10 m

Resolution: 1 mm
Accuracy in air:

  • ±6 mm @ 1 m

  • ±6 mm @ 3 m

  • ±5 mm @ 6 m

  • ±9 mm @ 10 m

Beam angle: 10° (-3 dB boundary)
Temperature compensation: Integrated

 

Operating Parameters

  • Operating temperature: -20°C to +60°C

  • Certification: ATEX / IECEx Zone 0

  • Protection rating: IP68

  • Construction: Potted PVDF enclosure with 316 stainless steel brackets

 

Data Logger & Communication

  • Measurement interval: down to 30 seconds

  • Serial communication powered from logger

  • Optional external battery pack

  • Configurable via PC IDT software

  • Obstruction (unwanted echo) filtering available

 

Applications

  • CSO monitoring

  • Incident prevention and blockage detection

  • Reservoir level monitoring

  • Flow monitoring (with velocity sensors)

  • Level-to-flow conversion for flumes and weirs