Pyxis SP-395N NDSA Handheld
Handheld fluorometer measuring UV absorbance of NDSA at 0-100ppb for rapid research and development validation.
Pyxis SP-395N NDSA Handheld
The Pyxis SP-395N is a handheld fluorometer that uses UV fluorescence to detect NDSA content in water, giving instantaneous results for rapid research and development validation. Because the technology is not wet chemistry, results can vary with sample quality, and users should establish correlation to wet chemistry values while accounting for background organic interference. The device is not suited to waters containing nitrite treatment, as nitrite causes a false low reading.
Description
The Pyxis SP-395N is a handheld fluorometer that uses UV fluorescence to detect NDSA content in water, delivering instantaneous results without wet chemistry. This makes it a fast screening tool for research and development work, though because the underlying technology is not wet chemistry, results can vary with sample quality and background organic matter can produce a false positive reading.
Users are advised to establish the correlation between SP-395N readings and exact wet chemistry values for their specific water, and to check untreated makeup water for background UV fluorescence signal that could bias results. Importantly, the device will not read correctly in waters containing nitrite treatment, since nitrite absorbs UV light and causes a false low value.
With no sample cuvette needed and a large colour graphic screen visible in direct sunlight, the SP-395N is built for quick, repeatable field or lab-bench checks in water chemistries free of nitrite interference.
Why Use This
Fast R&D Validation
Instantaneous UV fluorescence readings let researchers validate NDSA content in the field without waiting on wet chemistry results.
Know Its Limits
Understanding that background organics and nitrite treatment can affect readings helps users apply the SP-395N correctly and correlate results to wet chemistry values.
Applications
- Research and development validation — rapid NDSA screening during formulation or trial work
- Water treatment programs using NDSA — field or bench checks in consistent, nitrite-free makeup water
FAQ
What method does the SP-395N use?
It uses UV fluorescence to detect NDSA content in water, giving instantaneous results rather than using wet chemistry.
Are the readings equivalent to wet chemistry test values?
Not directly — because it is not a wet chemistry method, results may vary depending on water sample quality, and users should identify the correlation to exact wet chemistry values for their water.
Are there water chemistries where this meter should not be used?
Yes. The SP-395N will not work correctly in waters containing nitrite treatment, as nitrite absorbs UV light and causes a false low reading. Background organic matter can also cause a false positive.
Do I need a sample cuvette?
No, the SP-395N requires no sample cuvette and has a large colour graphic screen visible in direct sunlight.
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