Flow Sensors

NOS Hemispheric and Ballhead Sensor

Part No. NOS-VX0B

For measurement places with various geometries

For connection to NivuFlow 650 transmitters. High accurate flow measurement based on the transit time method for open channels and waters, mainly process water channels and natural water bodies.

  • Ultrasonic transit time sensor for connection to NivuFlow 650
  • Hydrometry with highest measurement accuracy
  • Measurement in clear to slightly polluted water
  • For 8-path measurements according to IEC 60041 (ASME PTC 18)
  • Measurement in open channels and surface water bodies
  • Resistant sensor material for use in various media
  • Up to 100 m of cable length between sensor and transmitter or adapter box

NOS hemispheric and ballhead sensors are part of a fixed measurement system for continuous flow measurement and storage of the recorded measurement data. They can be used for clean to slightly polluted media in part filled and full flumes as well as channels featuring various geometries and dimensions.

Typical NOS hemispheric and ballhead sensor applications

 

  • Fixed measurement of surface water bodies such as rivers, channels and similar
  • Irrigation systems 
  • Inlets and outlets conducting cooling water or circulation systems 
  • WWTP outlets
  • Investigation of infiltration/extraneous water or leakage
  • Industrial flow measurements
  • and many more

 

 

Common
Measurement principleUltrasonic transit time method
Measurement uncertainty flow velocity (v average) ± 0.1 % of measurement uncertainty value within the path
Measurement frequency0,9 – 1,2 MHz
ProtectionIP 68
Operating temperature-10 °C to +50 °C
Storage temperature-20 °C to +60 °C
Operating pressuremax. 1 bar
Cable lengths10/15/20/30/50/100 m pre-configured, with underwater plug to facilitate installation
Weight (sensor head)approx. 1000 g
Medium-contacting materialsPOM, carbon, stainless steel

Specifications subject to change.

Technical Instructions for Transit Time Sensors

Instruction Manuals / Technical Information English

Installation Instructions for Transit Time Sensors

Instruction Manuals / Technical Information English
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