Immersion probe with hygienic design
This Hellma immersion probe was especially developed to comply with all hygiene directives. This makes it the ideal tool for analysing
liquid processes in the food & beverage and pharmaceutical industry.
• Best possible transmission by the use of high-purity sapphire
• Compatible with the most established spectrometers
• Use of FDA approved FFKM (perfluoroelastomer) O-rings
• Ready to use in SIP and CIP processes
• Easy to clean due to totally aseptic design
• Electropolished surface for best possible prevention of sample adhesion
• High performance optics and minimal stray light
During measurement the collimated light beam passes through the sample to be measured only once, as during a cuvette measurement. The use of a deflecting prism with two totally reflective surfaces leads to very low stray light values.
Productinfo 661.2304-NIR
| Type | 661.2304-NIR |
| Sensing head material | Sapphire (Al2O3) |
| Probe barrel material* | Stainless steel 1.4435 (316 L)** |
| Flange | Customized to fit your process requirements (z. B. Varivent®) |
| Sealing of sensing head | Perfluorelastomer FFKM (with approval of FDA-, USP Class VI- and 3A Sanitary Stan |
| Outer-Ø | 25 mm |
| Total length | Customized to fit your process requirements |
| Max. immersion depth | Customized to fit your process requirements |
| Light path | 1 mm, 2 mm, 5 mm, 10 mm (others upon request) |
| Typical transmission | NIR > 40 % in air, at 1500 nm |
| Max. pressure | 10 bar |
| Max. temperature | 140 °C |
| Optical fibres | Built in can be changed at Hellma NIR 400 nm – 2.300 nm (25.000cm-1 - 4.348 cm-1) UV/Vis and UV/Vis low solarisation upon request |
| Optical fibre connections | Sockets for FSMA Type 905 |
*other materials optional ** delta ferrite < 1 % optional
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