LISA – The state of the art SAC254 sensor by TriOS


Long-lasting and energy-efficient UV-LED technology and a robust design are the core features of LISA UV. Like all TriOS sensors LISA uses the unique nanocoated windows combined with compressed air flushing to achieve long operating times without cleaning.

The TriOS G2 interface allows quick and easy integration of the sensor into existing process control systems or external data loggers. In addition to the integrated network interface, LISA UV is available with digital or analog output. The sensor can easily be configured through any standard web browser on a PC, tablet or smartphone.
The optical path length can be adapted to the application at any time by various lens sockets. An automatic turbidity
compensation is carried out by a second measuring channel.
Through application-specific correlation LISA UV can be configured for direct output of BODeq, CODeq, TOCeq. A direct output of UVT254 is also possible.

• Without sampling and preparation of test samples
• Real-time sensor
• Without reagents
• Optical window with nano coating
• LED technology

• Sewage treatment plants
• Environmental monitoring
• Drinking water
• Monitoring of UV-disinfection systems

LISA UV Datasheet

Light Source
2 LED (254 nm, 530 nm)
Photo diode
Measurement principle
Attenuation, Transmission
Optical path
1 mm, 2 mm, 5 mm, 10 mm, 50 mm
SAC254, CODeq, BODeq, TOCeq, UVT, Turb530
Measuring range at 1 mm path
5…1500 m-1 SAC254
Measuring range at 10 mm path
0,5…150 m-1 SAC254
Detection limit at 1 mm path
5 m-1 SAC254
Detection limit at 10 mm path
0,5 m-1 SAC254
Precision at 1 mm path
2,5 m-1 SAC254
Precision at 10 mm path
0,25 m-1 SAC254
Turbidity compensation
at 530 nm
Data logger
~ 2 MB
T100 response time
min. 4 s
Measurement interval
min. 2 s
Housing material
Stainless steel (1.4571/1.4404) or titanium (3.7035)
Dimensions (L x Ø)
300 mm x 48 mm (with 10 mm path)
~ 11.8” x 1.9” (with 10 mm path)
Weight stainless steel
~ 2,7 kg (with 10 mm path)
~ 6 lbs (with 10 mm path)
Weight titanium
~ 1,9 kg (with 10 mm path)
~ 4.2 lbs (with 10 mm path)
Interface digital
Ethernet (TCP/IP), RS-232 or RS-485 (Modbus RTU)
Interface analog
Ethernet (TCP/IP), 4…20 mA
Power consumption
≤ 1 W
Power supply
12…24 VDC (± 10 %)
Maintenance effort
≤ 0.5 h/month (typical)
Calibration/maintenance interval
24 months
System compatibility
Modbus RTU or Analog Out (4…20 mA)
1 year (EU: 2 years)
US: 2 years
Max. pressure with SubConn
30 bar
~ 435 psig
Max. pressure with fixed cable
3 bar
~ 43.5 psig
Max. pressure 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…10 m/s
~ 0.33 fps to 33 fps
Scroll to Top