Water Quality & Analysis

NivuParQ 850New

Part No. NP8-5

Continuous measurement of particle concentration (TSS equivalent) with new ultrasonic measurement method using multi-frequency echo


Particle Concentration Measurement

measure. continuously. easily. maintenance-free.

The determination of solids concentrations with the parameter TSS (total suspended solids) is becoming more and more important. With NivuParQ 850, you can easily carry out permanent particle concen­tration (TSS equivalent) measurements in rainwater, combined water and flowing water. The low-maintenance system is used in partially and fully filled channels, ducts and pipes with of various shapes and dimensions. The measurement technology is based on ultrasonic backscattering and uses complex algorithms to record both the particle concentration (TSS equivalent) and the particle size distribution (incl. fine fraction smaller than 63 µm) in the water. In combination with a flow measurement, the summed load can be determined.


Benefits and Properties

  • Continuous measurement of particle concentration (TSS equivalent) with new ultrasonic measurement method using multi-frequency echo
  • Determination of 5 classes of particle sizes including the fine fraction < 63 µm
  • Very low operating costs, as no time-consuming sampling with laboratory analysis is required
  • Easy installation as well as quick and easy operation
  • Low-maintenance and reliable measurement system
  • Low investment costs for the measurement place setup
  • Approval of the measurement system for use in potentially explosive environments
  • Additional measurement parameters through integrated temperature and level measurement


Possible Applications

One possible application is the measurement of the precipitation-related dirt load in stormwater discharge. You can also use NivuParQ 850 to analyse the actual retention effect of stormwater treatment plants in drainage systems. The measurement data serve as a basis for optimal dimensioning of treatment structures. Another possible application is real-time control based on particle concentration in sewer networks with separation systems.

Technical Data
Measurement condition
Mass density

1100…2650 g/l

Channel shapes


Channel dimensions

Min. DN 250

Minimum filling level

≈ 7 cm

Medium type

Rainwater and mixed water, watercourses

Specifications subject to change.

Particle concentration measurement
Measurement range

50…6000 mg/l

10…6000 mg/l at low noise values

Particle size classes

< 63 µm / 63…100 µm / 100…200 µm / 200…400 µm / 400...1000 µm

Measurement frequency

1, 2, 3, 4, 6, 7 and 9 MHz

Measurement principle

multi-frequency echo

Specifications subject to change.

Medium-contacting materials

Polyurethane / stainless steel 1.4571 / PPO GF30 / PEEK without and with pressure measurement cell;

Hastelloy® with pressure measurement cell


Cable lengths

10 / 15 / 20 / 30 / 40 / 50 / 60 / 70 / 80 / 90 / 100 m

Operating pressure

Max. 4 bar without pressure measurement cell

max. 1 bar with pressure measurement cell


Operating temperature

-20 °C…+50 °C / Ex version

-20 °C…+60 °C / Non-Ex version


II 2G Ex ib IIB T4 Gb / Ex ib IIB T4 Gb

ATEX: TÜV 20 ATEX 268840 X

IECEx: TUN 20.0009X



Specifications subject to change.

Temperature Measurement
Measurement uncertainty

±0,5 K

Measurement range

-20 °C…+60 °C

Specifications subject to change.

Level measurement - pressure
Measurement uncertainty

< 0.5 % of final value

Zero point drift

max. 0.75 % of final value (0...50 °C)

Measurement range

0…500 cm

Specifications subject to change.


Modbus TCP via networks (LAN/WAN, Internet), Modbus RTU via RS485 or RS232, Ethernet TCP/IP

Data memory

1.0 GB internal memory, can be read out via USB stick, frontside


rotary pushbutton, 2 function buttons, menus in German, English, French and other languages


240 x 320 pixel, 65536 colours

Operating temperature

DC: -20°C bis +70°C, AC: -20°C to +65°C, max. humidity 80%, non-condensing

Power supply

100 - 240 V AC, 47 to 63 Hz or 10 - 35 V DC

Specifications subject to change.



Brochure NivuParQ 850

Particle Concentration Measurement in Water Industry

Technical Description / Mounting Instruction PKM Particle Concentration Sensor


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