Uncompromising Accuracy for Every Critical Measurement

Struggling with unreliable refractive index readings or time‑consuming temperature equilibration? The A.KRÜSS Optronic DR7300-P precision digital refractometer delivers laboratory‑grade accuracy with nD ±0.00002 precision alongside a sapphire prism and intelligent Peltier temperature control that works across an extended range. Whether you are formulating pharmaceuticals, verifying beverage concentrations, or validating chemical purity, this benchtop instrument transforms raw samples into validated results in approximately two seconds.

Below you will find the exact technical parameters that make this advanced refractometer a trusted choice for regulated and research laboratories worldwide.

Technical Specifications (Model DR7300‑P)

• Model Number: DR7300‑P (Manufacturer Article Number: 4710163)

• Measurement Principle: Critical angle of total internal reflection (LED 589 nm)

• Measurement Range (Refractive Index nD): 1.30000 – 1.72000

• Measurement Range (Brix): 0 – 95 %

• Measurement Accuracy (nD): ±0.00002

• Measurement Accuracy (Brix): ±0.02 %

• Resolution (nD): 0.00001

• Resolution (Brix): 0.01 %

• Measurement Period: Approximately 2 seconds

• Measurement Prism: Scratch‑resistant and chemical‑resistant sapphire

• Light Source: LED, 589 nm wavelength

• Sample Volume Required: Approximately 0.3 ml

• Components in Contact with Sample: Sapphire, PTFE, stainless steel 1.4404 (X2CrNiMo 17‑12‑2)

• Temperature Control: Internal Peltier system with integrated Pt100 sensor

• Temperature Control Range: 10 – 80 °C

• Temperature Control Accuracy: ±0.03 °C

• Temperature Measurement Accuracy: ±0.1 °C

• Temperature Resolution: 0.01 °C

• Temperature Compensation: Automatic for Brix (ICUMSA selectable); user‑definable optional

• Pre‑installed Scales: Refractive index (nD), Brix sucrose

• User‑defined Scales: Unlimited number, fully editable

• Simultaneous Scale Display: Up to three measurands visible at once

• User Accounts Capacity: More than 10,000

• Methods Storage: More than 1,000

• Measured Data Storage: More than 1,000,000 results

• Operation Interface: 7.0‑inch capacitive touchscreen (800 × 480 pixels); also operable via keyboard or PC mouse

• User Management: Three user levels with individual login and password security (complex passwords with expiry periods)

• Audit Trail Functionality: Fully available (tamper‑proof GxP‑compliant printout of data and device settings)

• Interfaces: 2 × USB 2.0 (Type A), 1 × RS‑232, 1 × LAN (network integration via DHCP client)

• Data Export: Network printer, USB stick, password‑protected network folders, PDF/A export

• Environmental Compliance: GAMP, GMP, CFR 21 Part 11 (for DR7200‑P/DR7400‑P models; DR7300‑P meets all pharmacopoeia standards)

• Housing: Powder‑coated aluminum, IP20 protection class

• Dimensions (Width × Height × Depth): 230 mm × 170 mm × 360 mm

• Weight: 5 kg

• Operating Voltage: 90 – 240 V AC, 50/60 Hz

• Power Consumption (Measuring Mode): 40 W maximum; 75 W peak

• Ambient Temperature (Operation): 10 – 40 °C

• Ambient Humidity: 10 – 90 % (non‑condensing)

• Noise Level (15‑30 °C range): Less than 10 dB – whisper‑quiet operation

Key Benefits – Faster Workflows, Higher Data Integrity

Integrating the A.KRÜSS DR7300‑P high‑accuracy digital refractometer into your quality control workflow delivers immediate improvements across three critical areas:

Lab efficiency – The measurement period of approximately two seconds per sample eliminates waiting, while the intuitive 7‑inch touchscreen allows method selection and results review with minimal training. Sample volumes as low as 0.3 ml reduce waste and enable precious sample conservation.

Accuracy and repeatability – With nD ±0.00002 accuracy and 0.00001 resolution, the DR7300‑P pharmaceutical and food refractometer maintains consistent performance across its entire 1.30000 to 1.72000 measurement range. The integrated Pt100 sensor with 0.01 °C resolution ensures that every reading is temperature‑compensated precisely.

Operator and data safety – Tamper‑proof PDF/A export, multi‑level user management, and a completely available audit trail make this instrument fully traceable for GxP and FDA‑regulated environments. The TempGate® LED ring confirms sample temperature stability before measurement begins.

Solving Common Laboratory Pain Points

Pain point: Inconsistent results from unstable temperature control
Temperature drift ruins refractive index comparability across batches and shifts. The high‑precision benchtop refractometer from A.KRÜSS Optronic features Dynamic Temperature Control (DTC), which fully automates sample temperature equilibration. You can select the desired temperature accuracy level, and the Peltier system handles the rest – meaning your results are reproducible regardless of ambient lab conditions.

Pain point: Time‑consuming manual calculations and scale conversions
Manual conversion between refractive index, Brix, and custom scales introduces errors and slows throughput. This DR7300‑P laboratory analytical instrument displays up to three measurement scales simultaneously. Pre‑installed scales include refractive index and Brix, with unlimited user‑defined scales available. Automatic temperature compensation for Brix follows ICUMSA standards, so your numbers are always report‑ready.

Pain point: Audit failures due to missing data traceability
Regulatory inspectors demand proof that every measurement is authentic and unaltered. The fully traceable digital refractometer with audit trail functionality stores all measurement results together with all method settings. Signed and protected import ensures that only files recognized as permissible by the system can be loaded. Every printout is GxP‑compliant, tamper‑proof, and fully traceable to the user account that performed the measurement.

Pain point: Device downtime from contamination or environmental damage
Dust, spills, and airborne particles shorten instrument lifespan and cause unexpected calibration failures. The hermetically sealed ventilation system protects optics and electronics, while the chemical‑resistant stainless steel tray and sapphire prism withstand harsh cleaning agents. The A.KRÜSS DR7300‑P rugged refractometer for demanding labs operates maintenance‑free for years, even in busy production environments.

Feature Spotlight – What Makes This Refractometer Unique

• TempGate® LED readiness indicator – A color‑coded ring around the sample well signals when the set temperature has been reached, eliminating guesswork.

• Measurement Stability Check (MSC) – This function verifies measured value stability during an ongoing measurement; only values meeting set criteria are saved to memory.

• Dynamic Temperature Control (DTC) – Select your desired accuracy level; the instrument automatically adjusts equilibration time to match the sample type.

• Sapphire prism – Extremely hard surface resists scratches and chemical attack, preserving optical clarity for over a decade of daily use.

• Three simultaneous measurement modes – Choose single, interval, or continuous measurement to match your testing protocols, from spot checks to process monitoring.

• Low noise operation – At less than 10 dB within the 15–30 °C range, this instrument is barely audible, making it suitable for open‑plan laboratories.

• Modular flow‑through cell option – For automated sampling and process integration, a replaceable flow‑through cell can be fitted without replacing the entire instrument.

Compatible Standards and Pharmacopoeias

The DR7000 series complies with European (Ph. Eur.), United States (USP), Japanese (JP), and British (BP) pharmacopoeias, as well as ASTM, DIM, ICUMSA, NIST, OIML, GAMP, and GMP standards. This ensures that your DR7300‑P compliance‑ready refractometer meets regulatory requirements for pharmaceutical, food, and chemical quality control worldwide.

Ready to Upgrade Your Refractive Index Measurements?

Stop compromising on precision or struggling with untraceable paper records. The DR7300‑P digital refractometer for quality control laboratories delivers ±0.00002 nD accuracy, a sapphire prism that lasts for years, and a fully auditable data integrity system – all wrapped in a whisper‑quiet, IP20‑rated benchtop enclosure.

Contact us today for a custom quotation, an on‑site demonstration, or assistance with IQ/OQ validation documentation for regulated environments. Order Model DR7300‑P (Article Number 4710163) to bring true laboratory‑grade precision to your daily concentration measurements.