Model UVS-1 -Absorption Photometer

The probe detects all UV- absorbing substances at the specified wavelength. This means the probe is sensitive against substances which absorb only UV- light (e.g. benzene) and substances which absorb in the whole UV/VIS/NIR spectrum (e.g. solids). Therefore the dual wavelength option offers a second reference measurement, typical in the NIR- spectrum at 850nm. The UV- absorption is affected by UV- absorbing substances and turbidity (solids). The NIR- absorption is affected by particles (turbidity) only. The difference of the both absorption signals ([UV- absorption + turbidity absorption] - turbidity absorption) allows to detect all substances which absorb in the specified UV- range only.

If the probe is specified to measure the absorption in the visible spectrum (colour measurement) the result will be calculated as follow: ([colour absorption + turbidity absorption] - turbidity absorption) = colour absorption. The dual wavelength measurement compensates for turbidity and results UV / colour absorption the influences of the turbidity will be compensated. A temperature sensor provides a shut down of the probe in case of to high product temperature. This temperature signal can be displayed as an additional option (accuracy approx. +/- 1°C). The transmitter model Messenger is required to process the sensor signal of the UV- absorption, respectively the optional signals of dual wavelength absorption and temperature. Calibration can be done in multiple ranges and measurement units by using up to 8 calibration samples. The UVS-1 covers a wide span measuring ranges, due to the availability of multiple optical path lengths (2mm up to 50mm).

• Low Maintenance
• Typical calibration interval 12 Month
• Material measuring windows: Sapphire
• Typical measuring wavelength: 254nm or 280nm
• Other wavelength in UV/VIS- spectrum available on request
• Optional dual wavelength measurement
• Optional process temperature measurement
• Installation via TH- Varivent plate (TH- Variline flow cell)
• Variline flow cell sizes: DN40 to DN150 (1 1/2” to 6”)
• Optional extended probe length (insertion length 215 mm)
• Optional flanges: DIN, ANSI, Tri clover, APV, TH, ...
• Optional Air purge
• Cleaning: CIP / SIP

• UV254 (optional with reference wavelength 850nm)
• UV280 (optional with reference wavelength 850nm
• Spectral Absorption Coefficient (SAC)
• TOC / COD / PAC
• Toluene, Benzene, …
• Colour measurements in the visible spectrum

• Potable water / Waste water treatment
• Produced water
• Food and drinking industry
• Bio technology
• Pharmaceutical