TF56-N scattered light turbidity sensor connected to an ANSI flange

TF56-N with an ANSI flange connection on its' side

Turbidity sensor TF56-N mounted on a tri-clamp process connection

TF56-N Turbidity Sensor

Dual Channel Turbidity Sensor

The TF56-N sensor is an inline real-time device designed to measure light absorbance at 11° caused by interaction with process turbidity. As an NIR light beam is passed through a dynamic process stream, the sensor simultaneously measures the amount of light scattered at 11° and the remaining amount of un-scattered light at 0°.

Used For

Turbidity scales:
- ppm (DE)
- FTU (ISO)
- EBC
Turbidity monitoring
- in filter control
- of condensate
- for separator control (food & beverage)
Lauter tun / mash filter control
Turbidity measurement angle 0°, 11°

Features

Benefits

Inline turbidity sensor with scattered light detection at 11°

High sensitivity for very low turbidity

NIR reference channel at 0°

Reliable turbidity measurement without interference by color

4 x 11° scattered light detectors

High accuracy in detection of particles

The TF56-N is a precision scattered light turbidity sensor, which is designed for inline operation. Light scattered from particles (trace suspended solids, undissolved liquids or gas bubbles) in the medium is detected by four hermetically sealed silicon photodiodes at an angle of 11°. At the same time, the direct light is detected by a reference photodiode. This unique dual channel design compensates for disturbances of the carrier medium. The sensor can be calibrated in ppm (DE), EBC or FTU and measures extremely low particle sizes and concentrations.

TF56-N
Schematic	Sensor Body Windows Focusing optics Detector 0° (Abs.) Four 11° detectors Optics Module Lamp module
Measurement
Measurement principle	2- Channel Scattering of light (11°)
Measurement wavelength(s)	730 nm - 970 nm
Detector(s)	1 silicon photodiode (hermetically sealed)(Abs.) 4 silicon photodiodes (hermetically sealed) (11°)
Measuring Range	any measuring range between 0 - 25 to 500 ppm (DE) 0 - 10 to 200 FTU 0 - 2.5 to 50 EBC
Optical path length	40 mm standard (50 - 60 mm with reduced accuracy)
Calibration	basic calibration 11°: in ppm (DE) / FTU / EBC
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 HT	permanent:-20 °C - 190 °C (-4 °F - 374 °F) peak (15 min/day):-20 °C - 210 °C (-4 °F - 410 °F)
Ambient temperature	operation:0 - 40 °C (32 - 104 °F) operation:-20 - 40 °C (-4 - 104 °F) with option HT 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.