matrixFlu VIS


Our high-end matrixFlu VIS fluorometer combines multiple excitation and detection wavelengths for fluorescence measurements in a single device with a highly compact design. The special optical arrangement of excitation and detection channels enables not only single values to be determined, but also a 4x4 matrix of wavelength combinations. This allows quasi synchronous in-situ detection of EEMs (Excitation Emission Matrices).
MatrixFlu VIS is primarily designed for the online detection of algae (cyanobacteria, green algae, etc.) and is expanded by the detection of CDOM.
State-of-the-art, specially selected LEDs are used for fluorescence excitation. The stability of measured values is increased by an internal temperature correction.
Equipped with our innovative G2 interface with web browser configuration, internal data logger, flexible protocols and data outputs, matrixFlu offers extensive features that go significantly beyond what's available on the market today.
The unified platform of all TriOS photometers also facilitates a standardized spare parts and consumables system, which allows the use of a wide range of accessories for our devices. Furthermore the cutting-edge G2 interface enables quick integration into third-party systems.

Measurement technologylight source: 3 LEDs (375 nm/470 nm/590 nm) detector: 4 photo diodes with filter
Measurement principleFluorescence

Chlorophyll a [µg/L]

Phyocyanin [µg/L]

CDOM [µg/L]

Measuring range

0...200 µg/L

0...200 ppb

Measurement accuracy5 %
Turbidity compensationNo
Data logger~ 10 MB
T100 response timemin. 12 s
Measurement intervalmin. 6 s
Housing materialStainless steel (1.4571/1.4404) or titanium (3.7035)
Dimensions (L x Ø)155 mm x 36 mm    ~ 6.1˝ x 1.4 

stainless steel ~ 0.6 kg    ~ 1.3 lbs

titanium ~ 0.5 kg    ~ 1.1 lbs



Ethernet (TCP/IP)

RS-232 oder RS-485 (Modbus RTU, OGC PUCK)

Power consumption≤ 1.8 W
Power supply12...24 VDC (± 10 %)
Maintenance effort≤ 0.5 h/month (typical)
Calibration/maintenance interval24 months
System compatibility Modbus RTU, OGC PUCK

1 year (EU: 2 years)

US: 2 years

Max. pressure

with Subconn 30 bar    ~ 435 psig

with fixed cable 3 bar    ~ 43.5 psig

in FlowCell 1 bar, 2...4 L/min    ~ 14.5 psig, 0.5 to 1 gpm

Protection type



Sample temperature

+2...+40 °C

~ +36 °F to +104 °F

Ambient temperature

+2...+40 °C

~ +36 °F to +104 °F

Storage temperature

-20...+80 °C

~ -4 °F to +176 °F

Inflow velocity

0.1...5 m/s

~ 0.33 fps to 16.4 fps


• Without sampling and preparation of test samples

• Real-time sensor

• Without reagents

• Optical window with nano coating


• Surface water

• Bathing lakes

• Drinking water production and treatment

• Raw water treatment

• Environmental monitoring