Description
Single Wavelength UV Absorption Analyzer
The AF45 is a high precision UV light absorption analyzer 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
Typical Applications
Chromatography
Aromatics Detection
Ultrafiltration
Single-Use Technology
Clean in Place Identification
The AF45 is a single wavelength UV absorption analyzer, 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 | 
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|
| 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) peak 30 min/day: 0 – 120 °C ( 32 – 248 °F) |
|
| Process temperature OPTION HT |
permanent: -30 – 120 °C (-22 – 248 °F)
peak 15 min/day: -30 – 150 °C (-22 – 302 °F) peak 30 min/day: -30 – 140 °C (-22 – 284 °F) |
|
| Process temperature OPTION EX |
permanent: -30 – 70 °C (-22 – 158 °F)
peak 15 min/day: -30 – 135 °C (-22 – 275 °F) peak 30 min/day: -30 – 120 °C (-22 – 248 °F) |
|
| Process temperature OPTION EX-HT |
permanent: -30 – 120 °C (-22 – 248 °F)
peak 15 min/day: -30 – 150 °C (-22 – 302 °F) peak 30 min/day: -30 – 140 °C (-22 – 284 °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-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)
peak 30 min/day: -30 – 140 °C (-22 – 284 °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)
