Technical Specifications

The P9100-P is a benchtop digital polarimeter from A.KRÜSS Optronic, positioned as the base model in the P9000 series. It measures optical rotation and the international sugar scale with ±0.003° accuracy and a one-second measurement period. Integrated Peltier temperature control holds the sample at 15–45 °C with ±0.1 °C accuracy, and the 7-inch capacitive touchscreen runs the full operation. The instrument is compatible with 21 CFR Part 11 requirements and supports audit trail and user management functions. The specifications below cover the standard unit; cuvettes, quartz control plates, and wavelength modules are ordered separately.

Model/Part Number: P9100-P

Measurement Performance

• Scales: optical rotation (°), specific rotation (°ml/(dm·g)), international sugar scale (°Z), user-defined (unlimited)

• Measurement range: ±90° and ±259 °Z

• Measurement accuracy: ±0.003° and ±0.01 °Z

• Resolution: 0.001° and 0.01 °Z

• Measurement period: approximately 1 second

• Wavelength: 589 nm standard; optional wavelengths 365, 405, 436, 546, 578, 633, 880 nm

• Maximum cuvette length: 200 mm

• Sample permeability: > 0.1 % (OD3)

• Light source: high-performance LED, >100,000 hours lifetime

Temperature Control

• Temperature control: integrated Peltier

• Temperature control range: 15–45 °C

• Temperature control accuracy: ±0.1 °C

• Temperature measurement: integrated Pt100 sensor

• Temperature measurement range: 5–60 °C

• Temperature measurement accuracy: ±0.1 °C

• Temperature measurement resolution: 0.01 °C

• Temperature compensation: automatic for quartz and sugar (sucrose); user-defined compensations possible

Data Integrity and Compliance

• 21 CFR Part 11: compatible

• Audit trail: available (optional activation)

• User management: three user levels, over 10,000 user accounts

• Methods: practically unlimited number of methods

• Data export: print via network/ASCII, USB stick, or password-protected network folder

• Pharmacopoeias: Ph. Eur., USP, BP, JP

• Additional standards referenced: ASTM, DIN, ICUMSA, NIST, OIML, GLP, GMP

Assistance Systems

• TempGate: LED ring indicates measurement readiness when sample temperature is stable

• Measurement Stability Check: background analysis with adjustable tolerance

• Sample Cell Check: visual control of cuvette filling; bubble/streak detection (camera version on P9200-P/P9300-P)

• Automatic detection of quartz control plates and cuvettes via RFID

• Automatic menu-guided adjustment

Interfaces and Physical Specifications

• Display: 7.0-inch capacitive touchscreen, 800 x 480 pixels

• Interfaces: 2x USB 2.0 Type A, 1x RS-232, 1x LAN (RJ-45), 1x AUX

• Dimensions (W x H x D): 680 x 170 x 330 mm

• Weight: 16 kg

• Power supply: 90–240 VAC, 50/60 Hz

• Power consumption (measurement mode): 85 W

• Sample contact parts: borosilicate glass, PVDF, NBR, Hastelloy B3, stainless steel 1.4404

• Ambient conditions: 10–40 °C, 10–90 % relative humidity (non-condensing)

Standard Accessories Included:

• P9100-P polarimeter base unit

• Adapter aperture 100 mm and blind cover 100 mm

• Power cable

• Operating manual

• Factory calibration certificate

Items Excluded:

• Polarimeter cuvettes (various lengths and materials available separately)

• Quartz control plates for calibration

• Additional wavelength modules

• Printer for report output

• Barcode scanner

Pre-installation Requirement:
Place the instrument on a rigid, level bench with clearance for the 200 mm cuvette length and access to the touchscreen. Connect to a grounded power supply within the 90–240 VAC range. Allow the unit to reach ambient temperature before first use if stored in a colder environment. Perform the automatic adjustment with a certified quartz control plate before the first measurement. For network export and audit trail functionality, provide a LAN connection and confirm permissions for the target export folders.

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Why This Polarimeter Fits Regulated Quality Labs

The P9100-P sits at the entry point of the P9000 series, but it does not cut the features that regulated labs depend on. The P9100-P polarimeter delivers ±0.003° accuracy on optical rotation, one-second measurement, and integrated Peltier temperature control from 15 to 45 °C. It is compatible with 21 CFR Part 11, supports audit trail and three-level user management, and stores methods without a practical limit.

The Peltier control is the feature that changes daily work. Instead of waiting for a sample to equilibrate to room temperature, or relying on a circulation thermostat, the instrument holds the cuvette at the set temperature. TempGate signals when the reading is stable, and the Measurement Stability Check confirms the value meets your tolerance before it is saved. For a QC lab running repeated sugar or pharmaceutical checks, that removes the guesswork about when to record.

For buyers sourcing through OS4U, the configuration questions are cuvette length and material, whether additional wavelengths beyond 589 nm belong in your method, and whether quartz control plates are needed for your calibration schedule. The KRÜSS P9000 series information lists the full model comparison.

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Key Benefits

Accuracy that clears the standard-measurement bar

The P9100-P laboratory polarimeter holds ±0.003° on optical rotation and ±0.01 °Z on the sugar scale, with 0.001° and 0.01 °Z resolution. For pharmacopoeia and ICUMSA work, that is precision with margin rather than precision at the limit.

Peltier control inside the instrument

Integrated Peltier temperature control covers 15–45 °C with ±0.1 °C accuracy, and the Pt100 sensor reads temperature to 0.01 °C resolution. No external thermostat, no water bath, no waiting for ambient equilibration. TempGate confirms readiness before the reading is taken.

One-second measurement

Approximately one second per measurement. For a lab processing a queue of samples, the instrument is not the step that adds time.

Compliance built in, not bolted on

21 CFR Part 11 compatibility, audit trail, three-level user management with over 10,000 accounts, and unlimited method storage. The P9100-P carries the data integrity features that regulated labs need without moving to a higher-tier model.

Scales that cover sugar and pharmaceutical work

Optical rotation, specific rotation, international sugar scale, and user-defined scales are all available. Up to two measured values can be displayed simultaneously, and temperature compensation for quartz and sucrose is pre-installed.

Sample handling that resists chemistry

Sample contact parts include borosilicate glass, PVDF, NBR, Hastelloy B3, and stainless steel 1.4404. Cuvettes are chemically resistant, and the RFID system detects cuvettes and quartz plates automatically.

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Solving the Problems That Slow Polarimetry Down

Struggling with temperature-dependent readings? Integrated Peltier control holds the sample at 15–45 °C with ±0.1 °C accuracy. TempGate signals when the value is stable, and the Measurement Stability Check confirms tolerance before saving.

Worried about audit evidence? The P9100-P is 21 CFR Part 11 compatible with an activatable audit trail, three user levels, and unlimited method storage. Exports go to password-protected network folders or USB.

Getting readings that vary between operators? Automatic menu-guided adjustment, RFID detection of cuvettes and quartz plates, and the Stability Check remove the subjective steps. The same sample gives the same saved value.

Running samples that attack standard cuvettes? Sample contact parts include Hastelloy B3 and PVDF, and chemically resistant cuvettes are available. The instrument handles aggressive samples without a separate configuration.

Needing more than the sodium D-line? The standard 589 nm wavelength covers most work, but optional wavelengths from 365 to 880 nm are available if your method requires them.

Losing time to external temperature control? The Peltier system is inside the instrument. No circulation thermostat, no water bath, no tubing to connect and clean.

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Warranty & Support

We provide a 1-year manufacturer’s warranty covering parts and labor. Technical support, installation assistance, and operational training are also available. Replacement parts and consumables are available throughout the product’s service life.

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