OHAUS Explorer® Semi-Micro Balances

Category Laboratory Balances
Manufacturer Ohaus
Country of manufacture the United States

When laboratory work and research requires accuracy to the hundred-thousandth, there is simply no room for error. The Explorer series of semi-micro balances has been designed with the technology to ensure that your very specific weighing results are accurate. Sophisticated laboratories requiring accuracy and looking for innovative technology to obtain measurement results can find both in Explorer semi-micro balances.

Weighing, Percent Weighing, Parts Counting, Check Weighing, Dynamic/Animal Weighing, Filling, Totalization, Formulation, Differential Weighing, Density Determination, Peak Hold, Pipette Adjustment, SQC

Full-color VGA graphic display (5.7 in. diagonal), 4-wire resistive touch screen. QWERTY keyboard and numeric keypad to quickly input GLP and GMP data and other application data

AC Adapter (Included)

Easy access communication ports including 2 units of USB port and RS232 and an optional fourth port of either RS232 or Ethernet. GLP/GMP Data Ouput with Real Time Clock. Data Transfer Function.

Metal base, ABS top housing, stainless steel pan,anti-static glass draftshield with flip-top door, replaceable in-use cover, automatic door as option models

Design Features
AutoCal™ fully-automatic internal calibration system, fast stabilization time, four touchless sensors, built-in ionizer with automatic door models, up to 14 operating languages, OIML models available, SAVE to USB function, menu lock switch, security bracket, integral weigh below hook for below balance weighing applications, removable stainless steel weighing platform, stability indicator, overload and underload indicators, auto standby.


  • Geared for high-performance with up to 0.01mg readability and capacities up to 220g. The AutoCal™ Internal Calibration system ensures accuracy of results in applications that require high precision.
  • Equipped with a color touchscreen display that enhances the user-experience. In addition, touchless sensors, automatic draftshield doors (on select models) and ionizer ensure the integrity of results.
  • SmarText™ 2.0 software, intuitive icon-based navigation, 99 item library, 6 user profiles and below minimum sample weight indication – all combine to provide an easy yet efficient weighing experience.
Key Attributes
Capacity 52-220g (model dependent)
Readability 0.00001g to 0.0001g
Calibration Internal
Draft protection Doors
Data output port RS232 and USB
Warranty 2 Years


Manufacturer Specifications
Model EX125D EX125 EX225D EX225D/AD EX225/AD
Capacity 52g/ 120g 120g 120g / 220g 120g / 220g 220g
Readability (d) 0.01mg / 0.1mg 0.01mg 0.01mg / 0.1mg 0.01mg / 0.1mg 0.01mg
Repeatability (@20g) 0.015mg
Repeatability (@Capacity) 0.1 mg 0.02mg 0.1mg 0.03mg 0.03mg
Linearity ±0.1 mg
Span Calibration Points 50g 100g 50g 100g 50g 150g 200g 50g 150g 200g 50g 150g 200g
Calibration Standard AutoCal™, AutoCal on Δ1.5° temperature change, 3 hours
Automatic Door n/a Standard*
Weighing Units g, mg, kg, ct ,gn, oz, ozt, lb, dwt, N, mom, tical, msg, tola, baht, Hong Kong Tael, Singapore Tael, Taiwan Tael, Custom Units 1, Custom Unit 2, Custom Unit 3
Applications Weighing, Parts Counting, Percent Weighing, Checkweighing, Dynamic Weighing, Filling, Totalization, Formulation, Differential Weighing, Peak Hold, Density Determination, Pipette Adjustment, Statistical Quality Control
Stabilization Time 0.1 mg: ≤3 second, 0.01 mg: ≤8 second
Sensitivity Temp. Drift 0.50 ppm / °C
Display 5.7 in / 14.5 cm (diagonal) Full-Color touch screen
Interface Standard connectivity: 1 USB host, 1 USB device, 1 RS232
Optional connectivity: 2nd RS232, Ethernet
Working Enviroment 10°C – 30°C / 50°F – 86°F, 85% RH, non-condensing
Storage Conditions -14°F (10°C) to 140°F (60°C) at 10% to 90% relative humidity, non-condensing
Power Supply AC Adapter Input: 100 – 240 VAC 0.6 A 50/60 Hz, AC Adapter Output: 12 VDC 1.5 A
Pan Size (diameter) 3.1 in / 80 mm
Dimensions (WxHxD) 9 × 15.5 × 13.8 in / 230 × 393 × 350 mm
Shipping Dimensions (WxHxD) 24.9 × 25.2 × 18.4 in / 632 × 640 × 467 mm
Net Weight 15.4 lb / 7 kg 16.5 lb / 7.5 kg
Shipping Weight 26.5 lb / 12 kg 27.8 lb / 12.6 kg

How long is the cable that attaches the Explorer Balances' control terminal to the weighing base?

1 meter. If a longer operation distance is required, a Terminal Extension cable is available.


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OHAUS Explorer® Semi-Micro Balances Accessories