• Description
  • Specification
  • Consumables


The mobile hand-held Tensiometer measures the surface tension as well as the surfactant concentration easily and quickly in the laboratory and at the production line. It directly shows the measuring results on a comfortable display and alerts the user if defined limit values are exceeded.

Measuring Principle

Like all SITA Tensiometer, the DynoTester+ is based on the bubble pressure method for measuring the dynamic surface tension of liquids.

The principle of the bubble pressure method is, that an air stream is lead through a capillary into the process liquid. A sensor measures the pressure which is needed to generate a bubble

Application fields

  • Controlling the surfactant concentration in industrial parts cleaning industry
  • Monitoring the surfactant concentration in electroplating baths
  • Measuring the surface tension of liquids at the plant (atline) or in the laboratory (offline)
  • Quality control of inkjet inks, paints and lacquers/varnishes
  • Incoming and outgoing inspections of surfactant containing goods

Mobile use for external work


Surface tension

  • Measuring range: 10…100 mN/m (dyn/cm)
  • Resolution: 0.1 mN/m (dyn/cm)

 Bubble lifetime

  • Adjustable range: 15…20,000 ms
  • Resolution: 1 ms

Sample temperature

  • Measuring range: 0…100 °C
  • Resolution: 0.1 K

Power Supply

  • Mains adapter 100…240 V, 47…63 Hz
  • Battery (Lion, integrated): 3.6 V / 1,950 mAh min. 10 h operating hours
  • Power consumption: 2 W max.

Interface, Storage, Dimensions, Weight

  • USB interface: data transfer, battery charging
  • Display: 124 x 168 pixel, illuminated
  • Storage : 25 values/profile
  • Dimensions (WxHxD): 75 x 168 x 35 in mm

Weight of instrument: 230 g