AF45 UV Sensor

Single Wavelength UV Absorption Sensor

The AF45 is a high precision UV light absorption sensor designed for inline operation to provide accurate concentration measurements with remarkable repeatability, linearity and resolution. Wavelength and optical path length are individually configurable for extremely high accuracy to meet process control requirements.

Used For

  • UV range:
    • 0 - 0.05 to 3 CU (concentration units), dependent on filter/OPL used
  • UV absorption control and UV Absorption control
    • in Chromatography: Pre / Post column monitoring (OD) for optimized pooling
    • of concentrations in permeate or retentate
    • in TFF / Ultrafiltration
    • of organic load in water / condensate
    • of the concentration of aromatics (Caprolactam, Aniline, Phenol, etc.)
    • as TOC, COD, BOD trend analysis
  • Disinfection control treatment of water
Features
Benefits

UV sensor for single wavelength absorbance measurement with lamp reference
Precise UV measurements with compensation of lamp effects

Six UV wavelengths available
Optimized solution for specific applications requirements

Prepared for use of calibration filters
Easy validation by user with NIST traceable calibrated filters

Long lasting light source
reliable process monitoring with reduced maintenance

High temperature version available
Suitable for SIP process

The AF45 is a single wavelength UV absorption sensor, which is perfectly suited to monitor protein concentrations in downstream chromatography applications. Sealed reference photodiodes compensate for any variances in lamp intensity, assuring the highest level of precision and long-term stability. With the availability of several wavelength and bandwidth options, the AF45 can also be used for the detection of aromatic compounds, organic load and other demanding applications.

AF45
Schematic
  1. Sensor Body
  2. Windows
  3. Filter
  4. Measurement detector
  5. Reference detector
  6. Lamp module (mercury)
Measurement
Measurement principle

1- Channel Absorption of light

Measurement wavelength(s)

254-13, 280-09, 280-13, 290-13, 300-13, 313-13 nm, ... others on request

Detector(s)

1 silicon photodiode (hermetically sealed)

Reference detector(s)

1 silicon photodiode (hermetically sealed)

Measuring Range

any measuring range between

0 - 0.05 to 3 CU

(dependent on filter used / OPL)

(contact product specialist for application specific ranges)

Optical path length

1 - 160 mm

Calibration

CU (concentration units) application specific calibration

Light source

low pressure mercury lamp

typical life span: 1 to 2 years (8,000 to 16,000 hours)

Resolution

< ± 0.05 % of respective measuring range

Repeatability

< ± 0.5 % of respective measuring range

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, 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

2-Sapphire, 3-Sapphire Biotech (do not use Pyrex®)

Window gaskets

Viton® (FDA), EPDM (FDA / USP Class VI), Kalrez® 4079, ... others on request (do not use Silicone)

Temperature Ratings
Process temperature

permanent: 0 - 70 °C ( 32 - 158 °F)

peak 15 min/day: 0 - 135 °C ( 32 - 275 °F)

Process temperature
OPTION HT

permanent: -30 - 120 °C (-22 - 248 °F)

peak 15 min/day: -30 - 150 °C (-22 - 302 °F)

Process temperature
OPTION EX

permanent: -30 - 70 °C (-22 - 158 °F)

peak 15 min/day: -30 - 135 °C (-22 - 275 °F)

Process temperature
OPTION EX-HT

permanent: -30 - 120 °C (-22 - 248 °F)

peak 15 min/day: -30 - 150 °C (-22 - 302 °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 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.

Product Variants

AF45-EX-VB
AF45-EX-VB
AF45-EX-HT-VB
AF45-EX-HT-VB
AF45-HT-VB
AF45-HT-VB

Process temperature OPTION HT

permanent: -30 - 120 °C (-22 - 248 °F)
peak 15 min/day: -30 - 150 °C (-22 - 302 °F)

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)

C4000 - C8000 Product Information

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