Turbidity technology

Cell density measurement in the Biotechnology

The fiber optic turbidity measuring system was developed by Aquasant for the biotechnology and is mainly used for the online measurement of the cell density in bioreactors and fermenters. The measured turbidity signal in function of the cell density is an essential additional regulation parameter for research, development and production.
The turbidity measuring system is also used in other industries, as example in the chemical industry for the surveillance of the crystallization or the determination of solids.

Overview

Fields of applications:	Scope of use
Biotechnologies Pharmaceuticals Chemical Industries Food industries Water control	Cell density measurement Crystallization control Filtration control Determination of particles/solids Quality control Flocculation control

The measuring method is designed with the following features:

High sensitivity scattered light measurement
Equipped for on-line measurement
External light compensation
Infrared measurement
Extended linear measuring range
Complete operating controls on the front panel
User friendly
Fiberglass optics
Easy probe handling/mount
Emitting and receiving optics on the same level
Probes can be sterilized and autoclaved
Intrinsically safe probe for hazardous area

Measuring principle

An infrared transmitter set to 940 nm, carries out the optical coupling of an infrared radiation in a fiber-optics cable for the emitting signal (1). The probe introduces the radiation into the medium (2) by both sides at the same time. A high precision optical receiver (3) sends the reflected infrared radiation towards the rear through a fiber-optics cable for the receiving signal (4) to the measuring unit which evaluates it.

Aquasant measuring technique Ltd

Hauptstrasse 22 / 4416 Bubendorf Switzerland

+41 61 935 50 00

+41 61 931 27 77