OHAUS EXR423 Explorer EXR Precision Balance, 420g Capacity, 1mg Readability, AutoCal, Touchscreen

OHAUS EXR423 Precision Balance — Milligram Accuracy Across a Practical 420 g Range

Many laboratory weighing tasks fall between the fine resolution of an analytical balance and the broad capacity of a high-range precision instrument. The OHAUS EXR423 Precision Balance fills that gap precisely: a 420 g maximum capacity paired with 1 mg readability delivers sub-gram measurement across a range wide enough for a majority of bench-level weighing tasks in chemistry, biology, and quality control. The enclosed draftshield and AutoCal™ ensure environmental factors never compromise that accuracy.

Key Features

• 420 g Capacity with 1 mg Readability: Extended precision range covers both milligram-accurate fine weighing and larger sample preparation within a single instrument.
• AutoCal™ Automatic Calibration: Internal calibration weight self-activates on temperature drift detection, maintaining measurement traceability without manual intervention or external weights.
• Anti-Static Glass Draftshield: 130 × 130 mm enclosed pan chamber shields against air currents and electrostatic charge that distort milligram-level readings.
• 7-inch TFT Color Touchscreen: High-contrast glass-overlay display with touchless sensors lets users control taring and application modes without physical contact with the terminal.
• Built-In Connectivity: USB Device, USB Host × 2, RS232, Ethernet; optional Wi-Fi and Bluetooth for wireless laboratory data networks.
• 11 Application Modes: Parts counting, formulation, check weighing, percent weighing, dynamic weighing, and more are all available natively on the platform.
• HID and NTP Support: Driver-free PC connection and synchronized time-stamping streamline integration with data acquisition and LIMS environments.

Detailed Overview

The EXR423 shares the 130 × 130 mm stainless-steel pan and draftshield configuration of the 220 g EXR223, but extends the working range nearly double — enabling milligram accuracy across a broader spectrum of sample masses. This makes it particularly useful for assay work where both reagent additions at the 1–5 mg level and bulk solvent masses approaching 400 g appear within the same protocol. Metal housing provides the dimensional stability required for repeatability at 1 mg sensitivity, and the robust glass draftshield construction maintains that performance in environments with nearby air circulation or HVAC drafts. The 10°C–30°C operating window and 80% humidity tolerance place the EXR423 within standard laboratory specifications. The four-level user management system and 100,000-entry log ensure compliance documentation remains organized and accessible.

Applications

• Laboratory-scale chemical formulation spanning milligram additives and gram-scale solvents
• Gemstone and precious-metal weighing requiring milligram accuracy across a wide mass spectrum
• Pharmaceutical QC weighing of finished-dose units and reference standards
• Parts counting in precision manufacturing where individual component mass is low
• Research biology sample preparation involving combined reagent additions to larger vessels

Why Choose the OHAUS EXR423?

The OHAUS EXR423 Precision Balance gives milligram-level precision a practical capacity ceiling of 420 g, fitting the real-world demands of diverse bench-level tasks. With automated calibration, full connectivity, and built-in compliance tools, it is ready to serve both research and regulated production environments. Order today to bring milligram accuracy to a wider range of your daily weighing work.