Description

• Presence/Absence test in 100 mL

• 6 – 15 hours

• Turbidity

• Runs 21 days unattended

• Results via PLC, LAN and SMS

• Verified by US-EPA ETV

Technology

The main components of the COLIFAST ALARM are the incubator reaction chamber, a flow injection pump system for liquid handling and a detector system including wavelength specific emitters combined with a spectrometer. The detection of down to 1 viable target bacterium is based on bacterial growth, group specific enzyme activity and measured concentrations of a fluorescent product (ppb MU). An increase in the number of target bacteria means an increase in the amount of β-D-glucuronidase (E.coli specific enzyme). The enzyme hydrolyses the growth medium substrate that releases MU (the fluorescent product) which yields a higher fluorescence signal on the COLIFAST ALARM The Colifast growth media contains inhibitors to prevent growth of non-coliforms.

Result

COLIFAST ALARM Series is user friendly, and is easily operated via the embedded touch screen computer or by remote control via an external PC. A phone call can also be used to start or to stop the instrument. The software will automatically generate a folder with the date and time of the run start and will save report files in the folder. Detector reading above thershold will indicate presence of target bacteria (red) or high turbidity (blue) on the screen This will activate selected audio visual alarms and update report files and information boxes below. ◗ Detect 1 cfu / 100 mL and turbidity results are presented as 0,1 - 10 FNU/NTU.

Periodic Duty

It is can automatically collect and analyze a new sample every 15 hours.

It is very easy to operate. A colifast growth medium flask contains 20 tests,

and typically needs to be replaced every 20th day (test frequency ; 1 sample

every 24 hours).