OHAUS EX423 Explorer Precision Balance, 420 g x 0.001 g

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  • ohaus explorer ex423 precision
  • ohaus ex423 precision balance
  • ohaus explorer touchscreen display
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OHAUS EX423 Explorer Precision Balance

OHAUS Explorer precision balances are packed with features that provide superior weighing performance and results. An intuitive icon-driven menu guides the operator through all of Explorer's functions by way of a large 5.7 inch color touchscreen display. Explorer features a modular design allowing the display to be separated from the base of the balance. This allows flexibility while also further isolating the weighing chamber from environmental disturbances like vibration. The modular design also allows the operator to use the balance inside of a fume hood while operating the display from outside. Four touchless IR sensors allow the operator to complete common tasks without touching the balance. This reduces the need to touch the balance during operation therefore reducing vibrations and prolonging the life of the balance through less physical contact.

OHAUS SmarText™ 2.0 Software utilizes graphical icons and messages to prompt the operator through the menu. This makes Explorer exceptionally simple to use, reducing the amount of time needed for training. Instructional messages guide the user through setup and calibration right out of the box. Once setup is complete, the user can easily navigate through 14 different weighing applications supported by Explorer. Minimum weight indicator shows prominently on the display ensuring samples meet minimum weight requirements per quality guidelines. Up to 14 languages are supported providing additional flexibility.

The ingeniously designed draft shield features anti-static glass, ample space for sample weighing and 3 access doors. The top draft shield door can be flipped open or the glass conveniently slides back. The stainless steel bottom is easy to wipe down and clean. Plus, a LED light is available inside of the weighing chamber for use in low light conditions. It is easy to remove the glass panels and doors making cleanup convenient and quick.

Explorer precision balances come standard with AutoCal™, OHAUS' advanced automatic internal calibration system. Explorer performs routine calibrations to help ensure accuracy is maintained. AutoCal automatically performs a calibration when it senses a change in temperature sufficient enough to affect weighing accuracy, or every 3-11 hours, depending on user configuration.


  • Modular design allows separation of the display from the weighing base which offers flexibility and improved accuracy
  • Brilliant 5.7" color touchscreen display with SmarText™ 2.0 graphical software featuring icon-driven software
  • Audible and visual feedback for touch screen input commands as well as checkweighing status
  • AutoCal™ automatic internal calibration performs routine calibration based on preset and user defined parameters
  • Ingeniously designed draft features anti-static glass, LED light and ample space for weighing and cleaning
  • Explorer supports 14 weighing applications making it one of the most flexible analytical balances on the market
  • 4 touchless infrared sensors (IR) can be programmed for hands-free operation of common tasks
  • User-friendly setup, calibration and operation through prompts and messages displayed on-screen
  • Fast stabilization times, up to 50% faster than other balances, improves productivity and throughput
  • Advanced vibration filtering offers exceptional balance stability in various environments
  • Superior shock resistance protects against disruptions in service caused by bumps and sudden movements
  • Minimum weight capability with visual warning feature on display
  • Password protected user manager with administrator capability
  • Expanded communication interface includes RS232 and 2 x USB with optional extra RS232 or Ethernet
  • Up to 14 operating languages provide flexibility and intuitive user setup
  • Convenient user information menu allows user to learn about all of Explorer's features
  • Up-front illuminated level indicator combined with level assist on screen ensures proper balance setup
  • Feet are adjustable using unique thumbwheels that make it easy to level the balance
  • Durable construction; Metal base, ABS top housing, stainless steel pan
  • User selectable communication settings and data print options
  • GLP/GMP data output with real-time clock
  • User definable project and user IDs
  • Integrated weigh below hook for under balance weighing and density determination
  • Security bracket helps protect against unwarranted removal of the balance
  • User selectable span calibration points
  • Software lockout, calibration lock and reset menu
  • Selectable environmental filters
  • Auto standby
  • Auto tare

Weighing Applications

  • Weighing
  • Percent weighing
  • Differential weighing
  • Filling
  • Formulation
  • Dynamic weighing
  • Peak hold
  • Parts counting
  • Density determination
  • Totalization
  • Pipette adjustment
  • Ingredient costing
  • Checkweighing
  • Statistical quality control (SQC)
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Warranty Information

2 year manufacturer's limited warranty
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Additional Information

420 g
0.001 g / 1 mg
Repeatability std:
± 0.001 g / 1 mg
± 0.002 g / 2 mg
AutoCal™, Automatic internal
Stabilization Time:
≤ 1.5 s
Sensitivity Drift (ppm/°C):
Minimum Weight (USP), Typical:
0.12 g
Pan Size:
Ø 5.1" / Ø 130 mm
Automatic Doors:
Draft Shield:
Glass Panels, 3 doors
Weighing Units:
Gram, Milligram, Kilogram, Carat, Ounce, Ounce Troy, Pound, Pennyweight, Grain, Newton, Momme, Mesghal, Hong Kong Tael, Singapore Tael, Taiwan Tael, Tical, Tola, Baht, Custom Unit 1, Custom Unit 2, Custom Unit 3
Tare Range:
To capacity by subtraction
Metal base, ABS top housing, Stainless steel pan, Modular design
RS232, 2 x USB (optional 2nd RS232 or Ethernet)
Display Type:
5.7" Full-color VGA graphic display, 4-wire resistive touch screen
Overall Dimensions (W x H x D):
9.1" x 13.8" x 15.5" / 230 x 350 x 393 mm
15.2 lb / 6.9 kg
Operating Temperature:
50° to 86° F / 10° to 30° C; 85% relative humidity, non-condensing
AC adapter
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