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4690 Series
Turbidity systems
2 Turbidity Systems
2.1 7998 Sensors
Details of the individual sensors are shown in Table 2.1.
Sensor No.
7998 001
(EPA 180.1)
7998 002
(EPA 180.1)
7998 006
(EPA 180.1)
7998 007
(EPA 180.1)
7998 011
(ISO 7027)
7998 012
(ISO 7027)
7998 016
(ISO 7027)
7998 017
(ISO 7027)
Table 2.1 7998 Sensor Range
2.2 Turbidity Measurement Systems
7998 001, 002, 011 and 012
Flow-through sensor (with wiper unit)
and wall- / panel-mount analyzer
Flow-through sensor (without wiper unit)
and wall- / panel-mount analyzer
Fig. 2.1 System Arrangements
IM/4690–EN Rev. A
Principle of Sensor
Incandescent lamp
Nephelometric
Incandescent lamp
Nephelometric
Incandescent lamp
Nephelometric
Incandescent lamp
Nephelometric
Infrared LED
Nephelometric
Infrared LED
Nephelometric
Infrared LED
Nephelometric
Infrared LED
Nephelometric
4690 500
7998 006, 007, 016 and 017
4690 500
Type of Sensor
Minimum Range
Flow-through
0 to 1 NTU
(with wiper unit)
Flow-through
0 to 40 NTU
(with wiper unit)
Flow-through
0 to 1 NTU
(without wiper unit)
Flow-through
0 to 40 NTU
(without wiper unit)
Flow-through
0 to 1 NTU
(with wiper unit)
Flow-through
0 to 40 NTU
(with wiper unit)
Flow-through
0 to 1 NTU
(without wiper unit)
Flow-through
0 to 40 NTU
(without wiper unit)
7998 001, 002, 011 and 012
Flow-through sensor (with wiper unit)
and panel-mount analyzer
Flow-through sensor (without wiper unit)
and panel-mount analyzer
2 Turbidity Systems
Maximum Range
0 to 40 NTU
0 to 400 NTU
0 to 40 NTU
0 to 400 NTU
0 to 40 NTU
0 to 400 NTU
0 to 40 NTU
0 to 400 NTU
4695 500
7998 006, 007, 016 and 017
4695 500
3
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