AF16-N turbidity sensor with a validation filter adapter on a tri-clamp flow cell

Inline turbidity sensor connected to a sanitary thread flow cell

AF16-VB-N attached to a TFMC sensor body

AF16-N inline turbidity sensor connected to a flange sensor body for industrial process control

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	Sensor Body Windows Filter Measurement detector Optics module 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 (904 L), 1.4571 (SS 316Ti), 1.4462 (318 LN), Titanium 3.7035 (Grade 2), Hastelloy 2.4602 (C22), Plastic TFM™ 4215, ... others on request
Line size	1/8 in. to 6 in. (DN 6 to DN 150), ... others on request
Process connection	Flanges (ASME, DIN, EN, JIS), Clamps (TC, ISO, DIN), Female Threads (NPT, DIN), Sanitary Threads (DIN 11851), Tube Ends (DIN, ISO, OD),DIN 11864-1/-2/-3 (DIN, ISO, OD), Varivent (DIN, IPS, OD), ... 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 / Kalrez® 6230 (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.