AF16-N Turbidity Sensor

Single Channel Turbidity Sensor

High precision sensor for direct installation into pipelines measuring NIR light absorption of various liquid samples. The optical path length can be individually configured to meet the process control requirements with the highest accuracy.

Used For

  • Turbidity scales:
    • CU (concentration units)
    • ppm (DE)
    • FTU (ISO)
    • EBC (ASBC)
  • Turbidity based
    • interface detection in food and beverage
    • separator control
    • filter control
    • detection of water in oil (edible, lube)
    • detection of oil in water / condensate

Designed for inline operation the AF16-N turbidity sensor is applied across many different industries, for a wide range of applications. With a broad capability from fairly low turbidity measurements to heavy slurries and the ability to easily monitor or control processes with high precision, makes it suitable to any area, where suspended solids in liquids are important.

Separator control is a common application for optek AF16-N sensors. While sensors can be used to monitor feed and concentrate for various reasons the first and most logical installation is often to monitor the centrate (clarified stream) to control centrifuge de-sludge intervals based on data rather than time intervals, which reduces unnecessary upsets and wear on the separator.

Features
Benefits

Inline turbidity measurement in demanding process conditions
No sampling or by-pass installation needed

Fast and accurate turbidity measurement or turbidity changes, independent of color influences
Immediate detection of turbidity changes to verify product quality

High dynamic measuring range
No change or adaptation of sensors necessary

Optional validation accessories
Easy on-site / on-demand verification of accuracy and linearity
AF16-N
Schematic
  1. Sensor Body
  2. Windows
  3. Filter
  4. Measurement detector
  5. Optics module
  6. Lamp module
Measurement
Measurement principle

1- Channel Absorption of light

Measurement wavelength(s)

730 nm - 970 nm

Detector(s)

1 silicon photodiode (hermetically sealed)

Measuring range NIR-Absorption

AF16-N:
any measuring range between

  • 0 - 0.05 to 6 CU
  • 0 - 50 to 40,000 ppm (DE)
  • 0 - 20 to 16,000 FTU
  • 0 - 5 to 4,000 EBC

AF16-P:
any measuring range between

  • 0 - 0.05 to 4 CU
Optical path length

AF16-N: 1 - 1000 mm

AF16-P: 1 - 160 mm

Calibration

Abs.: CU (concentration units) application specific calibration

Light source

special incandescent tungsten lamp 5.0 V DC, 970 mA

typical life span: 3 to 5 years (25,000 to 40,000 hours)

Resolution

< ± 0.05 % of respective measuring range

Repeatability

< ± 0.5 % of respective measuring range (scattered light < ± 0.3 %)

Linearity

< ± 1 % of respective measuring range (specific to application)

Protection

all optical parts have an IP rating of IP65 or higher

Sensor Body
Material

Stainless steel 1.4435 (SS 316L), 1.4539, 1.4571 (SS 316Ti), 1.4462, Titanium 3.7035 (Grade 2), Hastelloy 2.4602 (C22), Plastic TFM4215, PVC, ... others on request

Line size

1/8 in. to 6 in. (DN 6 to DN 150), ... others on request

Process connection

Flanges (ASME, DIN, JIS), Clamps (TC, ISO, DIN), Female Threads (NPT, DIN), Sanitary Threads (DIN 11851), Tube Ends (DIN, ISO, OD), Varivent, ... others on request

Process pressure

0 - 100 bar (0 - 1450 psi) - higher on request depending on process connection, materials and design

Windows

1-Pyrex®, 2-Sapphire, 3-Sapphire Biotech

Window gaskets

Silicone (FDA), Viton® (FDA), EPDM (FDA / USP Class VI), Kalrez® 4079, ... others on request

Temperature Ratings
Process temperature

permanent: 0 - 120 °C ( 32 - 248 °F)

peak 15 min/day: 0 - 150 °C ( 32 - 302 °F)

Process temperature
OPTION HT

permanent: -30 - 240 °C (-22 - 464 °F)

peak 15 min/day: -30 - 260 °C (-22 - 500 °F)

Process temperature
OPTION EX

permanent: -30 - 120 °C (-22 - 248 °F)

peak 15 min/day: -30 - 150 °C (-22 - 302 °F)

Process temperature
OPTION EX-HT

permanent: -30 - 240 °C (-22 - 464 °F)

peak 15 min/day: -30 - 260 °C (-22 - 500 °F)

Ambient temperature

permanent: 0 - 40 °C ( 32 - 104 °F)

operation: -30 - 40 °C (-22 - 104 °F) with options HT / EX / EX-HT

transport: -20 - 70 °C ( -4 - 158 °F)

Explosion Proof
Ex-proof

none

Ex-proof
OPTION EX (EN-D)

Sensor assembly in ex-proof version accor. ATEX (EN-D)

Ex-proof
OPTION EX (FM-D)

Sensor assembly in ex-proof version accor. FM (FM-D)

Calibration
Calibration adapter

none

Calibration adapter VB

Filter adapter FH03 for calibration filter used for sensor verification

Pressure and temperature ratings specified herein may be subject to limitations - see instruction manual. The appropriate choice of material for all wetted parts is the sole responsibility of the user. Data given are subject to changes without prior notice.

Speed / Spare Parts

Lamp Module AF16

Lamp Module AF16

PN: 1426-3131-0801-03

Lamp Module AF16-EX

Lamp Module AF16-EX

PN: 1426-3132-0901-13

Installation Kit AF/TF

Installation Kit AF/TF

PN: 1201-3131-0004-00

O-Ring 10.10 x 1.60 Viton® (4)

O-Ring 10.10 x 1.60 Viton® (4)

PN: 1203-0004-0008-02

O-Ring 18.77 x 1.78 Viton® (4)

O-Ring 18.77 x 1.78 Viton® (4)

PN: 1203-0004-0013-02

O-Ring 21.95 x 1.78 Viton® (FDA) (4)

O-Ring 21.95 x 1.78 Viton® (FDA) (4)

PN: 1203-0004-0015-02

O-Ring 25.12 x 1.78 Viton® (4)

O-Ring 25.12 x 1.78 Viton® (4)

PN: 1203-0004-0016-02

O-Ring 31.47 x 1.78 Viton® (4)

O-Ring 31.47 x 1.78 Viton® (4)

PN: 1203-0004-0018-02

Product Variants

AF16-HT-VB-N
AF16-HT-VB-N
AF16-EX-HT-VB-N
AF16-EX-HT-VB-N
AF16-VB-P
AF16-VB-P

Process temperature OPTION HT

permanent: -30 - 240 °C (-22 - 464 °F)
peak 15 min/day: -30 - 260 °C (-22 - 500 °F)

Ex-proof OPTION EX (EN-D)

Sensor assembly in ex-proof version accor. ATEX (EN-D)

Ex-proof OPTION EX (FM-D)

Sensor assembly in ex-proof version accor. FM (FM-D)

C4000 - C8000 Product Information

Visit our documentation page to view a complete list of translated documents.