Flow Sensors

NOS Rod Sensor

Part No. NOS-VX005/NOS-VX010

For measurement places with rectangular 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:] NOS Stabsensor für Durchflussmessung in sauberen bis leicht verschmutzten Medien

[Translate to English:] NOS Stabsensor für Durchflussmessung nach dem Laufzeitdifferenzverfahren

[Translate to English:] NOS Stabsensor für hochgenaue Durchflussmessung bei großen Messdistanzen

Ultrasonic transit time sensor for connection to NivuFlow 650
Hydrometry with highest measurement accuracy
WRAS approval for some versions
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 rod 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. Due to their mechanic construction the sensors are particularly suitable for use in part filled flumes with vertical walls.

The sensor holders are designed to install the sensors above the water level. The water level hence does not need to be lowered and moreover divers are not needed.

Typical NOS rod sensor applications

Fixed flow measurements in channels with various dimensions and similar
Irrigation systems
Potable water systems
Inlets and outlets conducting cooling water or circulation
WWTP outlets, distribution of dirty water and similar
Industrial flow measurements, process water
and many more

Common
Measurement principle	Ultrasonic transit time difference
Measurement frequency	Type NOS: 1 MHz, 200 kHz Type NOS0: 500 kHz, 200 kHz
Velocity range	±25 m/s Minimum flow velocity: 0.01 m/s
Channel Widths	0.5…200 m; other channel widths upon request
Accuracy	Rod sensor / (Hemisphere) Ball sensor: Flow Velocity (vaverage) within path ±0.1 % of measurement value Plug-in sensor / screw-in sensor: Volume flow (Q): ±0.5 % of measured value with process calibration
Protection	IP 68
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
Cable Design	Continuous assembled cable; Pre-assembled cable with underwater coupling (optional for NOS-V30B)
Cable types	Twinax 2x AWG 20; PUR
Temperature Measurement / Sound Velocity Measurement
Measurement range	0 °C…+60 °C
Measurement Error	±1 K
Outside cable diameter	8.5 mm
Sensor types	Rod sensor (Hemisphere) Ball sensor Plug-in sensor/screw-in sensor
Medium-contacting materials	Rod sensor/plug-in sensor/screw-in sensor: stainless steel 1.4571/AISI 316 Ti, CFK (Carbon), Viton® Hemisphere: stainless steel 1.4571/AISI 316 Ti, CFK (Carbon), POM, PUR, Neoprene with underwater coupling Ball head sensor: stainless steel 1.4571/AISI 316 Ti, CFK (Carbon), POM Cable: PUR

Specifications subject to change.

Technical Description | Transit Time Sensors (Rev. 08)

download file
PDF 4 MB

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