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.

[Translate to English:] Kugelkopfsensor für Durchflussmessung nach dem Laufzeitdifferenzprinzip

[Translate to English:] NOS Halbkugelsensor für Durchflussmessung in sauberen bis leicht verschmutzten Medien mit Montageblech

<link>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 principle	Ultrasonic transit time method
Measurement frequency	NOS: 1 MHz, 200 kHz NOS0: 500 kHz, 200 kHz
Velocity range	±20 m/s
Channel Widths	0.5…200 m; other channel widths upon request
Accuracy	flow velocity (v average) ± 0.1 % of measurement uncertainty value within the path
Protection	IP68
Operating temperature	-40 °C…+50 °C
Storage temperature	-40 °C…+70 °C
Cable lengths	10/20/30/40/50/60/70/80/90/100 m Extension option: Sensors can be connected to extension modules, cable length between extension module and transmitter max. 200 m
Medium-contacting materials	Stainless steel 1.4571, CFK (Carbon), POM, PUR, underwater plug and socket made of Neoprene
Temperature Measurement using Sound Velocity
Measurement range	0 °C…+60 °C
Measurement Error	±1 K

Specifications subject to change.

universal hemisphere sensor dimensions in mm

Dimensions ballhead 200 kHz sensor — Ballhead 200 kHz sensor dimensions in mm

Dimensions ballhead 500 kHz sensor — Ballhead 500 kHz sensor dimensions in mm

Technical Description | Transit Time Sensors (Rev. 06)

download file
PDF 4 MB

Mounting Instruction | Transit Time Sensors (Rev. 04)

download file
PDF 7 MB

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