The process photometer Testomat 2000® SO3 is a wet-chemical online instrument for monitoring the content of Sulphite SO32- in the 0 to 50 mg/l range using the colorimetric method.



  • monitoring of boiler feed water in steam boiler systems (sulfite for oxygen binding)


Measuring range

0.0 – 5 mg/l (resolution 0.1)
5 – 10 mg/l (resolution 0.5)
10 – 50 mg/l (resolution 1)


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 – 113°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


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: 5 to 30 °C; 41 to 86°F

Here you will find available reagents for the Testomat 2000® SO3.
Select accessories in the product search to find e.g. pumps, filters and service sets for the Testomat 2000® SO3.