Immersion probe with variable light path
This Hellma transflexion probe has been specifically designed for the use in laboratories and research units. It provides high flexibility as well as robust design which withstands even rough process conditions.
After passing through the solution to be measured, the light beam is reflected by a rear-coated mirror and passes through the solution a second time.
Product info 661.682-UV
| Type | 661.682-UV |
| Window material* | Quartz glass SUPRASIL® |
| Mirror material* | Quartz glass SUPRASIL® with aluminium reflective layer |
| Probe barrel material** | Stainless steel 1.4435 (316 L) |
| Probehead seal | Perfluorelastomer FFPM (DIN/ISO 1629) Klebstoff |
| Outer-Ø | 12 mm |
| Total length | 260 mm |
| Max. immersion depth | 215 mm |
| Removable | Typ 665.764 (light path equals to 2 x distance from mirror to window) 1mm, 2 mm, 5 mm, 10 mm, 20 mm |
| Typ. transmission | UV ca. 40 % in air, at 300 nm |
| Max. pressure | 15 bar |
| Max. temperature | 180 °C |
| Optical fibres*** | built in, not exchangeable UV Length: 1,8 m 240 nm–1100 nm (41.667 cm-1–9.090 cm-1) UV/Vis and UV/Vis–low solarisation upon request |
| Optical fibre connections | FSMA Type 905 |
*Sapphire on request ** other materials on request *** other fibre length optional
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Produktinfo 661.682-NIR
| Type | 661.682-NIR |
| Window material* | Quartz glass SUPRASIL® |
| Mirror material* | Quartz glass SUPRASIL® with aluminium reflective layer |
| Probe barrel material** | Stainless steel 1.4435 (316 L) |
| Probehead seal | Perfluorelastomer FFPM (DIN/ISO 1629) Klebstoff |
| Outer-Ø | 12 mm |
| Total length | 260 mm |
| Max. immersion path | 215 mm |
| Removable tips | Type 665.764 (light path equals to 2 x distance from mirror to window) 1mm, 2 mm, 5 mm, 10 mm, 20 mm |
| Typical transmission | NIR > 50 % in air, at 1500 nm |
| Max. pressure | 15 bar |
| Max. temperature | 180 °C |
| Optical fibres*** | Built in, not exchangeable NIR Length: 1,8 m 400 nm–2300 nm (25.000 cm-1– 4.348 cm-1) UV/Vis and UV/Vis–low solarisation upon request |
| Optical fibre connections | FSMA Type 905 |
*Sapphire on request ** other materials on request *** other fibre length optional
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