Concentrations of oxidising agents, such as chlorine, chlorine dioxide or ozone, above TVO-approved (German drinking water ordinance) limit values have a detrimental effect on the dye contained in Testomat 2000® reagents. Exact determination of the water hardness is therefore no longer guaranteed, and the Testomat instrument displays the error message ‘measuring fault analysis’ (MST analysis). To execute the measurement correctly, a reducing agent must be added.

Testomat 2000® Antox is a special version of Testomat 2000® with an additional pump for dosing a reducing agent. An oxidising agent fault is prevented prior to each analysis by adding a reducing agent to the filled measuring chamber. The further analysis of the water hardness measurement is then continued according to the standard procedure.


  • control of water quality in areas where measurement errors can arise due to oxidizing agents

Measuring range

0.05-25 °dH Water hardness
0.5-20 °dH Alkalinity
1-15 mmol/l p-value
0.05-0.5 mmol/l minus m-value
(depending on the choice of the indicator)

Technical Data

Power supply: 230–240 VAC, 115 VAC, 24 VAC all 50–60Hz
Power consumption: max. 30 VA
Protection class: I
Degree of protection: IP 65
Ambient temperature: 10–45 °C, 50 – 104°F
Option: booster pump see accessories
Dimensions (B x H x T): 380 x 480 x 280 mm
Weight: approx. 9.5 kg
Menu languages: German, English, French, Italian, Polish

Mains water supply

Operating pressure:
1 to 8 bar (15 to 116 psi) or
0,3 to 1 bar (5 to 15 psi), after removing of the valve body out of the regulator/filter housing
Water inlet: Opaque hose with 6 mm external diameter/4 mm internal diameter
Water outlet: Hose with 6 mm external diameter/4 mm internal diameter
Water temperature: 10 to 40 °C; 50 to 104°F

Here you will find available indicators and the Antox solution for the Testomat 2000® Antox.
Select accessories in the product search to find e.g. pumps, filters and service sets for the Testomat 2000® Antox