Jar Tester with continously variable stirring speed for laboratory and field use.


  • Continuously vatiable stirring speed
  • Digital display
  • Height adjustment of the stirring blades during operation
  • Timer feature


  • Flocculant Manufacturers
  • Waste Water Treatment Plants
  • Laboratories
  • Research Centres
  • Universities


Jar testers are designed for a range of applications – such as testing the efficiency of flocculation or precipitation agents.

The ET 740 model with 4 stirring places and the ET 750 model with 6 stirring places are fitted with an illuminated back panel for glare-free observation of the samples and are suitable for laboratory use.

The jar tester ET 730 with 4 stirring places is primarily designed for field use. The 4 stirring points are arranged in a circle around a lamp making it easier to observe the flocculation process.

State-of-the-art technology ensures maximum operating convenience and makes the unit maintenance-free. The main features of the laboratory jar testers are the continuously variable stirring speed, the digital display of stirring rpm, the timer function, the illuminated back panel, and the height adjustment option for the stirring blades during operation.

ET 730 requires 1000 ml beakers of low form. ET 740 and ET 750 require 1500 ml beakers of low or high form. The beakers are not included.