OHAUS EXR225 Explorer EXR Semi-Micro Balance, 220 g Capacity, 0.01 mg Readability, AutoCal, Touchscreen

OHAUS EXR225 Semi-Micro Balance — Maximum 220 g Capacity with 0.01 mg Micro-Level Precision

Micro-scale weighing across a 220 g range represents one of the most demanding specifications in laboratory instrumentation, and the OHAUS EXR225 Semi-Micro Balance delivers exactly that. Resolving mass to 0.01 mg (10 µg) across a generous 220 g maximum capacity, this instrument supports the full spectrum of pharmaceutical, chemical, and research workflows — from trace-level sample characterization to multi-gram compound synthesis — all from a single device equipped with automatic calibration.

Key Features

• 0.01 mg Readability at 220 g Capacity: Extended semi-micro range allows heavier samples to be weighed at 10 µg resolution, reducing the need to switch between instruments mid-protocol.
• AutoCal™ Automatic Internal Calibration: Motorized internal weight engages whenever thermal drift is detected, maintaining 0.01 mg accuracy without scheduled calibration interruptions.
• Enclosed Anti-Static Glass Draftshield: Fully sealed 80 × 80 mm weighing chamber eliminates airflow and electrostatic effects that degrade readings at microgram sensitivity.
• 7-inch TFT Touchscreen with Touchless Sensors: Proximity-activated taring reduces mechanical disturbance near the balance, protecting sensitive measurements from inadvertent interference.
• Wired Connectivity Standard: USB Device, two USB Host ports, RS232, and Ethernet accommodate printers, PCs, and LIMS; wireless expansion via optional dongle.
• 1,000-Sample Library: Stores reference masses for frequently repeated tasks, reducing setup time in high-throughput micro-weighing environments.
• Regulatory-Compliance Tools: Four-level user management, 100,000-entry audit log, and NTP timestamps address data integrity requirements in regulated workflows.

Detailed Overview

The EXR225 pushes the semi-micro class further than most instruments in its segment by combining an unusually wide 220 g capacity with 0.01 mg resolution on a single range. This breadth is particularly valuable in pharmaceutical development, where a single preparation might involve a weigh-boat plus a multi-gram compound plus a micro-quantity additive — all measured on the same instrument. The 80 × 80 mm stainless-steel pan fits small vessels and weigh boats typical in semi-micro work. Metal housing sustains calibration stability across a full laboratory day, and the 10°C–30°C operating range covers standard climate-controlled settings. The Explorer EXR platform's HID functionality allows direct computer connection without driver installation, streamlining lab IT management considerably.

Applications

• Pharmaceutical compound synthesis where both micro-quantity additives and larger base masses appear in the same batch
• Trace impurity and residue analysis in environmental and food safety testing
• High-precision density determination of compounds with high molar mass
• Advanced materials research requiring microgram accuracy across gram-scale samples
• Reference material certification requiring the widest possible mass range at 0.01 mg resolution

Why Choose the OHAUS EXR225?

The OHAUS EXR225 Semi-Micro Balance eliminates the common trade-off between semi-micro precision and usable capacity. With 220 g available at 0.01 mg readability, it handles protocols that other semi-micro instruments cannot, while full compliance and connectivity features support regulated data workflows. Order today to cover your full range of micro-weighing needs with one instrument.