A.KRÜSS Optronic Polarimeter overview Kruess-measurement tubes
PDF · Manufacturer document
A 100 mm or 200 mm designation does not by itself tell you the sample volume needed. Manufacturer accessory information shows that tubes of the same length may need substantially different volumes because of bore and construction.[1]
Confirm length and volume separately
Length is a measurement condition; volume depends on construction and filling. Establish the length required by the method, then assess whether enough sample is available to fill that design. Do not change length to save sample without confirming method suitability.
| Manufacturer tube example | Length | Approximate sample volume |
|---|---|---|
| PRG 50-E | 50 mm | About 3 mL |
| PRG 100-E | 100 mm | About 6 mL |
| PRG 200-E | 200 mm | About 12 mL |
| Standard PRG 100 / PRG 200 | 100 / 200 mm | About 12 / 17 mL respectively |
These examples come from the 2024 accessory document. Volumes are approximate and exclude funnel filling level and associated tolerances; they are not permissible filling limits. The table illustrates construction differences, not compatibility with every current polarimeter.[1]
Material and temperature control are separate choices
The document lists glass and metal tubes, jacketed designs, flow-through designs and tubes for particular temperature-control arrangements. Check wetted compatibility and cleaning for materials, and tube construction and instrument support for temperature control. Material alone does not imply flow-through or temperature-control functionality.[1]
Temperature and wavelength are also measurement conditions. A temperature-control device helps establish conditions but does not replace checking the actual sample state. Results at different temperatures or wavelengths should not be combined as if obtained under identical conditions.[2]
Static versus flow-through arrangements
Static loading requires attention to each filling, cleaning and cell condition. Flow-through arrangements additionally require inlet/outlet, transport, carryover and complete-filling checks. Two connections do not by themselves establish automatic measurement; confirm the whole supply arrangement.
Using compatibility information
Provide instrument model/version, required length, available sample, materials, temperature-control method and loading method, then confirm the item number. The existing compatibility table concerns older series and must not be transferred to P9000. This article does not create a new cross-series compatibility table.
Confirm method and instrument, then construction, then volume and accessories. Separating these decisions avoids assuming that equal length means interchangeability or similar photographs mean compatibility.
References
- [1] A.KRÜSS Optronic Polarimeter overview Kruess-measurement tubes, PDF page(s) 3、6–9 (file page order). View reference resource
- [2] A.KRÜSS Optronic Brochure Polarimeter, PDF page(s) 4 (file page order). View reference resource