Description
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
Typical Applications
Brewing Separator Control
Condensate and Cooling Water
Brewhouse Turbidity
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.
| AF56-N | ||
|---|---|---|
| Schematic | 
|
|
| 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, 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 | 10 mbar to 100 bar (0.15 psi to 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 – 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. | ||
