OHAUS EX423N/E Explorer Precision Balance, 420g Capacity, 0.001g Readability, NTEP Certified, Touchscreen

OHAUS EX423N/E Precision Balance — 420g Extended Range with Draftshield at 0.001g

Weighing tasks that push past the 220 g limit of compact milligram models—while still requiring 0.001 g resolution—find a capable solution in the OHAUS EX423N/E Precision Balance. Spanning 420 g with a dedicated draftshield and NTEP legal-for-trade certification, it gives gemological, pharmaceutical, and research labs nearly double the capacity of standard milligram precision balances without sacrificing draft protection or compliance.

Key Features

• 420g Range at 0.001g Readability: Covers heavier milligram-resolution tasks—weighing multiple gemstones simultaneously, preparing larger pharmaceutical batches, or handling samples that overflow smaller balance pans.
• Included Draftshield: An enclosed glass weighing chamber protects the 130 mm stainless steel pan from air disturbances, maintaining 0.001 g repeatability regardless of HVAC drafts or laboratory ventilation patterns.
• External Calibration with User-Set Schedules: Labs can apply certified reference masses according to their own calibration calendar, creating the traceable calibration records required under ISO or pharmaceutical quality systems.
• NTEP & Measurement Canada Certified: Certified readability of 0.01 g provides legal-for-trade compliance for gemological trade, pharmaceutical dispensing, and certified commercial weighing applications.
• 5.7-Inch Full-Color VGA Touchscreen: Bright, adjustable, and touch-responsive—navigates applications and balance settings in a single interaction, minimizing distractions during delicate milligram-level work.
• ±0.002g Linearity Across Full Range: Consistent accuracy from the lightest to the heaviest sample within the 420 g span prevents calibration-point-related accuracy shifts during multi-sample sessions.
• 19 Units of Measurement: From milligrams to Momme, Tical, and Hong Kong Tael, the comprehensive unit library serves every trade and research community that weighs at milligram precision.

Detailed Overview

The OHAUS EX423N/E Precision Balance fills the practical gap between 220 g milligram balances and 4 kg-plus models that lack draftshield protection. Its 420 g capacity handles larger sample sizes without sacrificing the enclosure that milligram-level weighing requires. External calibration is the deliberate design choice here: laboratories operating under certified quality management systems use traceable reference masses on audit-ready schedules, and this balance accommodates that discipline without compromise. The 5.7-inch VGA touchscreen provides access to 15-plus built-in applications including pipette adjustment, density determination, differential weighing, and ingredient costing. The compact draftshield housing (393 × 350 × 230 mm) keeps bench footprint manageable, and the 1-second stabilization time keeps per-sample throughput high despite the fine resolution.

Applications

• Gemological weighing of multi-stone lots and larger precious-metal pieces
• Pharmaceutical active ingredient dispensing and in-process weight checks
• Academic and analytical research requiring draft-protected milligram weighing at broader capacity
• Certified commercial weighing of precious materials with documented calibration records

Why Choose the OHAUS EX423N/E?

For gemologists, pharmaceutical analysts, and quality chemists who need 0.001 g resolution over a wider range than typical milligram balances offer, the OHAUS EX423N/E Precision Balance combines extended 420 g capacity with draftshield protection and NTEP certification. External calibration fits naturally into documented quality management workflows. Add to cart to bring certified milligram-level precision to larger sample sizes in your laboratory.