AF56 Turbidity detector connected to a varivent sensor body

AF56 turbidity sensor connected to a sanitary thread flow cell

AF56-N turbidity sensor connected to a tri-clamp sensor body

AF56-N with an industrial flange connection for turbidity measurements

AF56-N Turbidity Sensor

Single Channel Turbidity Sensor

AF56-N is a high precision sensor for direct installation into pipelines measuring NIR light absorption (turbidity) of various liquid samples. The optical path length can be individually configured to meet the process control requirements.

Used For

Turbidity scale:
- CU (concentration units)
Turbidity based
- phase separation control (beer / milk, milk / water)
- yeast dosing (brewery)
- outlet / inlet separator control
Lauter tun in brewery

The AF56-N is a precision turbidity detector which is designed for inline operation. Using NIR light from 730-970 nm the AF56-N measures solids concentration independent from color or color changes. Depending on the optical path length (OPL) measuring ranges from g/L to ppm are possible.

Features

Benefits

Inline turbidity measurement in demanding process conditions

No sampling or by-pass installation needed

Fast turbidity measurement or turbidity changes

Immediate detection of turbidity changes to verify product quality

AF56-N
Schematic	Sensor Body Windows Filter Measurement detector Optics module Lamp module
Measurement
Measurement principle	1- Channel Absorption of light
Measurement wavelength(s)	AF56-N:730 nm - 970 nm
Detector(s)	1 silicon photodiode (hermetically sealed)
Measuring Range	any measuring range between AF56-N:0 - 0.5 to 4 CU
Optical path length	1 - 200mm
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	< ± 0.5 % of respective measuring range
Repeatability	< ± 1.0 % of respective measuring range
Linearity	< ± 2 % 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), ... 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), ... 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, USP Class VI), Viton® (FDA, USP Class VI), Viton® - FEP (FDA, USP Class VI), EPDM (FDA, USP Class VI), Kalrez® 6230 (FDA, USP Class VI), Kalrez® 4079, ... others on request
Temperature Ratings
Process temperature	permanent:0 – 100 °C (32 – 212 °F) peak (15 min/day):0 – 120 °C (32 – 248 °F)
Process Temperature OPTION SF	permanent:0 – 60 °C (32 – 140 °F) peak (15 min/day):0 – 80 °C (32 – 176 °F)
Ambient temperature	operation:0 - 40 °C (32 - 104 °F) transport:-20 - 70 °C ( -4 - 158 °F)
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.