ColiMinder OMS
ColiMinder OMS
ColiMinder OMS
ColiMinder OMS



The VWM Outdoor Measurement Station (ColiMinder® OMS) contains two identical measurement devices. They are working independently either measuring the same sample at the same time or working alternating to minimize measurement intervals.

The station itself is a temperature-controlled box for use under harsh conditions. Each ColiMinder® is interfaced with a PC for data acquisition and processing. Real-time data are available via internet. The ColiMinder OMS takes the sample right before a measurement starts.

Measurement Principle:

ColiMinder® OMS is measuring the microbiological contamination trough the specific enzymatic activity of target organisms. The measurement process is a batch process. Time to result is 15 min, followed by a 15 min of cleaning cycle.

Data transfer and visualization:

Measurements data can be directly transmitted to the server through internet connection were data visualization is available (see example below) and automatic acknowledgements can be set.

Reagents are available for the following target organisms:

  • Fecal Contamination – E. coli (Beta-Glucuronidase Activity)
  • Coliform Bacteria (Beta-Galactosidase Activity)
  • Total Bacteria (ALP – Alkaline Phosphatase Activity)

Reagents are optimized for the use in either sweet or salt waters.

Measurement Units, Calibration of the Instrument:

ColiMinder® Mobile devices deliver quantitative results calibrated to respective enzymatic units according to the scientific definition of the given enzymatic activity. Measuring fecal contamination, the devices are calibrated to Modified Fishman Units per 100ml (MFU/100ml) for Beta-D-Glucuronidase activity (GUS) or to DEA Units (U/100ml) for Alkaline Phosphatase activity (ALP).

Technical Data:

Measurement time for quantitative results:15 min
Full working cycle incl. automatic cleaning:30 min
Detection limit (GUS):0.8 mMFU/100ml
Detection limit (ALP):1µU/100ml
Performance (measurements per day):up to 36
Number of sample intakes:Standard: 2×2
Housing:Thermally insulated cabinet
Instrument dimensions W x H x D80cm x 190cm x 95cm
Weight120 kg
Power supply230 V
Operating temperature range-20°C to 50°C

Application Examples: