OHAUS PR523N PR Precision Balance, 520g Capacity, 0.001g Readability, Internal Calibration, NTEP Certified

OHAUS PR523N Precision Balance — 1mg Readability with InCal Internal Calibration and NTEP Certification

Milligram-level precision with the convenience of semi-automatic internal calibration — the OHAUS PR523N Precision Balance occupies a unique position in the PR series. Certified for legal-for-trade use and equipped with OHAUS InCal technology, this 520g balance at 0.001g readability recalibrates from an internal mass reference, eliminating the need to procure and handle external calibration weights during routine calibration cycles.

Key Features

• 0.001g (1mg) Readability: Sub-centigram resolution puts this precision balance at the boundary of analytical performance — capable of measurements that standard precision balances cannot make.
• InCal Semi-Automatic Internal Calibration: An internal calibration mechanism allows recalibration to be triggered from the keypad without external masses, saving time and reducing handling risk.
• NTEP Legal-for-Trade Certification: Certified display value of 0.01g makes this balance suitable for commercial applications requiring governmental accuracy approval.
• Glass Draftshield Included: The removable enclosure shields the 120 mm pan from ambient air movement that would destabilize readings at 1mg resolution.
• 2-Second Stabilization Time: Balances milligram-level accuracy with practical throughput — fast for its resolution class.
• RS232 Serial Connectivity: Direct communication port enables output to printers and data systems for real-time GLP-compatible documentation.
• Security Bracket and Calibration Lock: Protect certified calibration from unauthorized modification in shared and regulated environments.

Detailed Overview

The OHAUS PR523N Precision Balance is the only internal-calibration model in this batch, and its InCal capability meaningfully changes daily operation. Rather than sourcing and applying an external calibration weight — with the associated handling time and traceability requirements — an operator initiates InCal from the keypad and the balance self-calibrates using an internal reference mass. This is particularly valuable in environments where calibration frequency is high or where minimizing calibration mass handling reduces contamination risk. Repeatability and linearity both hold at ±0.002g, making the 1mg display readability a reliable measurement rather than a nominal specification. The included glass draftshield protects the 120 mm pan from environmental interference at this sensitive resolution level, and the operating range extends from 10°C to 40°C.

Applications

• Milligram-level sample preparation and formulation in analytical and pharmaceutical laboratories
• Commercial dispensing or ingredient dosing where NTEP certification is legally required at 1mg precision
• Certified weighing in quality control environments that benefit from internal calibration to minimize external mass handling
• High-precision parts counting of very small components where piece weight is measured in milligrams

Why Choose the OHAUS PR523N?

The PR523N stands out in the PR series for combining InCal internal calibration, 0.001g milligram readability, and NTEP legal-for-trade certification in a single instrument. For regulated labs and commercial facilities that need milligram precision with self-calibration capability, it removes the daily friction of external calibration weight management. Order today to put certified milligram-level accuracy at your fingertips.