Turbidity

Turbidity measuring for lab to fermenter production

The turbidity measurement system is used in the chemical, pharmaceutical, biotechnology, food and petrochemical industries. The in-situ sensor measures on one level based on the reflection principle.

turbymex - the turbidity meter The system measures the crystallisation and cell density increase or monitors the filtration process or condensate
The ATM100 allows a 6-point linearisation per channel. Up to four measuring points can be operated via the bus. From sensors in 316L stainless steel with a fibre optic cable and remote local coupler electronics to mounted versions in various nominal sizes, almost anything is possible. The sum signal is high-resolution and sensitive due to the optical receiver lens.
Aquasant Turbidity measuring for Lab up to Fermenter production
Turbidity measurement
Why customers rely on aquasant® turbidity measuring technology
Typ: ATM100

  • In-situ real-time measurement
  • Long-term stability due to controlled light source
  • Use in sterile areas
  • CIP (cleaning in place) and SIP (sterilisation in place) up to 230°C
  • High reproducibility
  • Sensors for different solids concentrations
  • Customer-specific sensor designs
  • Ex design according to ATEX / FDA compliant
  • Datalogger with export function
  • Ethernet interface
  • The fundamental technology has proven itself since the 1980s

Measuring system

The evaluation electronics not only serve as a feed unit to the 4-wire bus, but also house the data processing intelligence in a secure manner with dynamic monitoring. All four measuring inputs have the same functionality. The benefit for you: high economic efficiency and investment security due to the long service life.

  • Each of them has an analog output of 4 - 20 mA with galvanic isolation
  • Each of them has 2 limit value relay outputs
  • 1 to 4 measuring inputs via the bus for ATA100 sensor connection
  • 6 linearisation points
  • Data logger with Excel export function
  • Ethernet web application


    • Ex version: Gas II (2) G [Ex ia Gb] IIC EMC STS 024 CE ****
    The coupler serves as the actual IR measurement and transmission unit from the ATM feed unit to the 4-wire bus. Variations available: remote version or mounted on sensor.

    The benefit for you: long-term stability is guaranteed through the controlled light source.

  • RS485 bus A/B
  • IR-LED 880 nm stabilised, fibre optic cable connection coupler
  • Up to 3 further couplers via the bus for ATA100 sensor connection
  • Housing in powder-coated aluminium or stainless steel


    • Ex design: Gas EEx II 1/2G EEx emb II T6 EMC STS 024 CE ****
    The standardised probes are produced according to process conditions and the media to be used in a customer-specific way. The AF44 sensor with a flat probe window is used for turbidity levels up to 60 g/l, while the AF43 with a conical window is used for >200 g/l of dry yeast.

  • Materialisation: Stainless steel, Hastelloy®, PP designs
  • Sensor shaft lengths, position of O-ring groove standardised or customer-specific
  • Process connection Ø 25 mm with G11/4" union nut or GL Ø 19/14/12 mm
  • Versions available: with mounted coupler or in fibre optic cable


    • Ex version: EEx II 1/2G EEx emb II T6
    The AF44 fibre optic sensors are NEW and available with compact and mounted ATA100 coupler electronics in stainless aluminium or steel housing.

  • Mounted connection head with ATA100* and/or with cooling element, product temperatures up to 120°C
  • Materialisation: Stainless steel, Hastelloy®, PP design
  • Sensor shaft lengths, position of O-ring groove standardised or customer-specific
  • Process connection Ø 25 mm with G11/4" union nut
  • Connection head for aluminium powder-coated IP65 or stainless steel P68
    • The calibration vessel is equipped with a cleaning device (wiper against bubble formation). Material: POM; not sterilisable; volume: 100 ml.

  • Incl. 3 adapters for bar probes AF44 CS/R 19 mm / AF 44 I S/R 25 mm
  • AF43 S/R 25 mm (without wiper)
  • 2 magnetic stirrers, smooth, 6 x 20 mm with PTFE coating and black anti-reflective protection

    • Documentation

    Monitoring of cell density in the fermenter
    The turbidity measurement system developed for the biotechnology industry is primarily used for the online measurement of cell density in bioreactors and fermenters. As a function of cell density, the turbidity signal is indispensable as an additional control parameter for research, development and production.

    PDF download
    Brochure: Turbidity meter type: ATM100
    Tech Docs: Turbidity sensor type AF44 I Gv ATA
    Tech Docs:Turbidity sensor type AF44 I SR with fiber optic cable
    Tech Docs: Turbidity sensor type AF44 I SR ø12mm with fiber optic cable
    Tech Docs: Turbidity sensor type AF44 I SR ø12mm PG13.5 with fiber optic cable
    Tech Docs: Turbidity sensor type AF43 I SR with fiber optic cable
    Tech Docs: Turbidity meter type: ATM100

    Condensate monitoring
    By measuring the turbidity, the safeguarding of the cooling circuit in industrial applications is guaranteed. Due to the high resolution of the measurement signal, it is possible to measure the oil concentration in the condensate or cooling water in the ppm range following the deployment of a heat exchanger.

    PDF download
    Brochure: Turbidity meter type: ATM1
    Tech Docs: Turbidity sensor type AF44 I G K ATA
    Tech Docs: Turbidity sensor type AF44 I SR with fiber optic cable
    Tech Docs: Turbidity meter type: ATM1

    Crystallisation monitoring
    Our measuring system meets the high industrial requirements through to the Ex zone. The turbidity meter monitors the crystallisation process in pipelines or directly in reactors.

    PDF download
    Brochure: Turbidity meter type: ATM100
    Tech Docs: Turbidity sensor type AF44 I G K ATA
    Tech Docs: Turbidity sensor type AF44 I Gv ATA
    Tech Docs: Turbidity sensor type AF44 I SR with fiber optic cable
    Tech Docs: Turbidity sensor type AF43 I SR with fiber optic cable
    Tech Docs: Turbidity meter type: ATM100

    Filtration monitoring
    Our measuring system meets the high industrial requirements through to the Ex zone. The turbidity meter monitors the filtration process with the highly sensitive AF44* sensors down to the ppm range.

    PDF download
    Brochure: Turbidity meter type: ATM100
    Tech Docs: Turbidity sensor type AF44 I Gv ATA
    Tech Docs: Turbidity sensor type AF44 I SR with fiber optic cable
    Tech Docs: Turbidity sensor type AF43 I SR with fiber optic cable
    Tech Docs: Turbidity meter type: ATM100

    New: Firmware update V1.38a ATM100

    The benefits you receive from the update of the turbidity meter ATM 100 V1.21 or older versions

  • Simplification of parameters
  • Increase in functional reliability
  • Firmware self-checks with there being a restart upon error detection
  • Increase in current output resolution from 8 to 10 bit
  • Fault notification on current output at 2 mA Communication error with ATM preamplifier
  • Sorting of download files
  • Activation of web access
  • Deletion of measurement files using the web
  • Ethernet and RS485/232 access
  • Improved storage of parameter data structure for export
  • “Memory full” mistake remedied


    • The MS Excel add-in for processing exported ATM100 data files is new: the zip file is available for download.
    MS Excel add-in zur Datenaufbereitung

    Suitable for the following industries:

    chemistry petrochemistry biochemistry biodiesel biotechnology pharmaceuticals
    surfactants laquers & paint animal feed cosmetics plant engineering
    planning & engineering services energy & environment R & D placstics technology service providers
    paper & forestry products construction material distributors petroleum tank farms private households
    wholesalers tank inspectors petrol stations surge tanks communities