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
  1. Sensor Body
  2. Windows
  3. Focusing optics
  4. Detector 0° (Abs.)
  5. Four 11° detectors
  6. Optics Module
  7. 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, 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 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.

Speed / Spare Parts

Lamp Module TF56

Lamp Module TF56

PN: 1426-3147-1501-03

Lamp Module TF56 SF

Lamp Module TF56 SF

PN: 1426-3147-1501-04

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 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

O-Ring 50.52 x 1.78 Viton® (4)

O-Ring 50.52 x 1.78 Viton® (4)

PN: 1203-0004-0021-02

x56 Series Product Information

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