Precision Weighing Balances
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Ohaus Pioneer PA523 milligram balance is a new model to the Ohaus Pioneer Series introduced in February 2015. The Ohaus PA523 balances weighs up to 520 grams and increments in 1 milligram graduations, features a draftshield and applications include weighing, parts counting, percent weighing, density determination and dynamic weighing applications. Ideal for basic weighing, the Ohaus Pioneer Balances are designed with the economy in mind. Ohaus understands not everyone is looking for a fancy touch screen display and other bells and whistles like the Ohaus Explorer Pro and Adventurer AX, but instead an affordable balance for basic weighing.

The Pioneer Plus offers additional features to the recently discontinued Ohaus Pioneer Series like a backlight display and specific gravity function. An optional density kit is available or use the built-in weigh below hook allowing you to suspend an item below the balance to calculate specific gravity.

All Pioneer Plus Milligram Balances are constructed with a metal base, ABS top housing, stainless steel pan, glass draftshield with sliding top door, up-front level indicator security bracket, calibration lock, user selectable communication and printing settings, auto standby, mechanical and software overload protection and replaceable in-use cover.

Pioneer Plus Balances models use a magnetic force restoration weigh sensor, not a cheap strain gauge that is prone to drifting with the numbers on the display moving even though you added nothing to the weighing platform. We get so many calls from end users saying they purchased some no name brand made and they hate their balance since it is a strain gauge. If you don't understand then watch this video HERE demonstrating a magnetic force restoration balance verses strain gauge scale.

Choose from 6 different milligram balance models in the Pioneer series with either a capacity of 160 grams or 520 grams. You can review the complete line of Ohaus Pioneer milligram balances HERE.

Ohaus Pioneer milligram scale was designed for basic routine weighing in a variety of laboratory, industrial and education applications. With the right combination of performance and features, the Ohaus Pioneer offers uncomplicated performance for all your basic weighing needs.

Standard Features Include:

  • Easy to Clean Draftshield – Pioneer’s draftshield is designed with all glass panels, including three sliding doors. All panels are easy to remove and replace, and together with a stainless steel bottom, make it fast and easy to clean
  • Upfront Level Indicator – Pioneer has been designed with an up-front level indicator, so that users can quickly ensure the balance is level prior to use
  • Selectable Environmental Settings – Three filter modes and adjustable zero tracking adjust balance sensitivity to environmental disturbances, or application requirements
When the Ohaus PA523 milligram balance is first installed, or is moved to another location, the milligram scale must be calibrated to ensure accurate weighing results. The Ohaus PA523 requires the purchase of a optional external 500 gram calibration mass to perform calibration. We always recommend that you purchase the calibration weight when you purchase the balance. You can learn more about calibration weights, class weights and the tolerances at

Is the Ohaus PA523 too expensive for your budget? We also offer the AND FX500i (520 g x 0.001 g) priced substantially less than the Ohaus PA523.

Many people call us looking for the absolute best value Precision Weighing Balances can offer in a milligram balance and the answer again and again is the A&D FXi milligrams balances. We believe the value is unmatchable in the AND Weighing FX500i since you get lightening fast weighing results, 520 grams weighing capacity with 1 milligram readability and all topped off with a 5 year limited manufacturer warranty at a low price.

Looking for a balance that comes standard with a USB interface? Be sure to see the Sartorius Practum 513-1S, Quintix 513-1S milligram balance or the advanced Secura 513-1S for pharma applications. These Sartorius models feature a touch screen user interface for easy balance configuration. Don't want to spend the money for the fancy touchscreen or USB interface but still want the Sartorius brand? Then be sure to see the Entris623-1S. We have used all of the major brand laboratory balances and without a question Sartorius builds the best performing lab balance for speed and accuracy.

US government customers call us saying the must comply with the Buy American Act clause the only similar balance we offer to the PA523 that is made in America would be the Scientech ZSP500. FAR Part 25.003 requirements state that domestic end products are preferred over foreign end products, and the Ohaus Pioneer is made in CHINA.

We understand purchasing an milligram balance is a major capital expense and if you have any questions give us a call and one of our weighing experts can discuss your weighing application and get you the most affordable balance for your weighing needs.

Ohaus Milligram Pioneer PA523

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Brand Model Capacity Readability
Ohaus Milligram Pioneer PA523 520 g 0.001 g
Add. Features
  • Carats
  • Grains
  • Milligrams
  • Ounces
  • Pennyweight
  • Grams
  • Troy Ounces
  • Newtons
  • Parts Counting
  • RS-232c
Comparable Scales

A&D Weighing GX600 miligram balance - $2218.00

Sartorius Practum513-1S milligram balance - $1299.20

Sartorius Quintix 513-1S milligram balance - $2153.34

Scientech SP-1000 millgram scale - $2839.95

Sartorius Secura 513-1S milligram - $2353.04

Sartorius ENTRIS 423-1S chemistry balance - $1003.20

A&D Weighing FX-500i milligram balance - $973.00

A&D Weighing Weighing FZ-500i Balance - $1299.75

A&D Weighing GF-600 Precision Scale - $1910.00

Ohaus AX523 Internal Calibration - $2248.25

Other Brands 500g Laboratory Weight - $327.00

Scientech ZSP500 College Scale - $1575.00

Scientech ZSP510D Delta Range - $1599.00

Ohaus EX423 electronic lab balance - $2877.25

Ohaus EX623 milligram lab balance - $3305.65

Sartorius MSA623P weigh to the nearest milligram - $5742.00

Sartorius lab weighing balance MSA623S - $6336.00

Sartorius Entris623i-1S Int Cal Balance - $1748.80

Sartorius ENTRIS 623-1S Milligram Balance - $1191.00

Ohaus InCal Pioneer PA523C - $1408.45

A&D Weighing FX700CT Milligram Balance - $999.97

Sartorius Cal-pak calibration weight set500g, 50g, 20mg - $483.00
MSRP: $1442.00
YOU PAY $1225.70
Ohaus Pioneer milligram balance
Easy to Clean Draftshield - Pioneer's draftshield is designed with all glass panels, including three sliding doors. All panels are easy to remove and replace, and together with a stainless steel bottom, make it fast and easy to clean.

Space-saving draftshield improves user experience and accessibility. The two piece, top-mounted draftshield doors open wide on both sides, providing ample room for sample placement, and also reduce the footprint of the draftshield in the rear of the balance when open.

Wide door entry provides unobstructed access and allows larger weighing vessels to be easily placed on the pan, reducing the chance of accidental spillage.

Large 4.7 inch stainless steel weighing platform. The 3 door glass windshield features a top windshield door opening. Stability, accuracy, and fast operation ensure optimal weighing results in routine weighing tasks. Ohaus Pioneer delivers stable and reliable weighing results for routine weighing tasks
Sartorius Entris623 Lab Balance

PWB Discount Price

Ohaus Pioneer PA523 $1225.70

S&H via UPS ground FREE UPS Ground in the lower 48 states
Is the PA523 too expensive for your budget? Be sure to see the Sartorius ENTRIS623-1S since we have special promotional pricing on the Entris623-1S allowing you to buy it for less than the PA523.
Capacity (g) 520
Readability (g) 0.001
Repeatability std (g) ±0.001
Linearity (g) ±0.002
Stabilization Time 3 seconds
Taring Time 1 second
Weighing Units gram, milligram, mesgal, mommes, Newton, ounce, pennyweight, Baht, carat, grain, tical, tola, troy ounce, custom unit
Weighing Applications Weighing, Parts Counting, Percent Weighing, Animal/Dynamic Weighing, Density Determination
Pan Size Ø 4.72 in / 120 mm
Calibration External calibration ONLY. If you want internal calibration see the PA523C
Span Calibration Points (g) 200g or 500g Calibration weights are NOT Included. You can purchase these in the Options Section
Motorized Internal Calibration NO - see the PA523C
NTEP Approved NO - See A&D FX300iN, Ohaus AX523N/E, Mettler-Toledo JS1603C/A or Scientech ZSP-400NJ
Tare Range To capacity by subtraction
Power Requirements AC Adapter ONLY. If you need a balance that operates on AC or Battery review the Mettler-Toledo JS1603C/A
Display Type 1-Line Alphanumeric LCD Display
Backlight White LED
Height above pan 7.2 inches
Base Housing (W×H×D) 7.7 x 11.3 x 12.6 inches
Weigh Sensor Magnetic Force Restoration
Communication RS232
Temperature Range 50°F to 104°F/10°C to 40°C
Humidity Range Maximum relative humidity 80 % for temperatures up to 86°F/30°C
Assembled in CHINA - For those people wanting a made in the USA balance see the Scientech ZSP-400NJ or ZSP-400NP
Shipping Dimensions 19.5 x 15.5 x 20.6 in / 49.5 x 39.5 x 52.2 cm
Net Weight 10.1 lb / 4.6 kg
Shipping Weight 15.2 lb / 6.9 kg
Ohaus Pioneer Pro Brochure Pioneer Laboratory Balances Download this color brochure showing additional features of the Ohaus Pioneer Series Balances
Ohaus Pioneer operation manual Manual Pioneer balance user manual Download the Instruction Manual for the Pioneer Pro loaded with tons of information.

In the YouTube Video get a general overview of the Ohaus Pioneer Series Analytical and Precision Balances. Learn about the optional printer, security cable, easy to remove glass panels for those models with a draftshield and more.
Ohaus Pioneer laboratory balance weight display
The new Ohaus Pioneer Pro Series features a red overlay keypad display and bright backlit LCD display provides ample lighting, making the display very easy-to-view in laboratories with dim lighting. The predecessor model, Ohaus PA313, had a blue overlay and no backlight display. The spirit bubble is located to the right of the weighing display so you can verify at a quick glance that your balance is level for optimum accuracy. The Ohaus Pioneer Pro Series now features the "Density Determination" weigh function. These great new upgrades we believe will increase the demand even more for this basic entry level milligram balance.
Lab balance with optional scale printer
On the rear of the balance you'll find a built-in RS232 allows connection to an Ohaus SF40A impact printer or a computer. Sends Balance ID plus spaces for recording User ID, Project ID, time and date.

Integral security bracket allows you to secure your balance to a workstation to prevent unwarranted movement or theft

The 2 adjustable rear leveling feet level indicator helps to ensure that the Ohaus balance is level.
Weigh below hook for specific gravity
The Pioneer Pro balance is now equipped with a weigh below hook for weighing below the balance. Before turning the balance over, remove the pan and draft shield elements to prevent damage. The black removable protective cover is the weigh below underhook opening. To use this feature, remove power from the balance, then remove the protective cover for the weigh below opening. The balance can be supported using lab jacks or any other convenient method. Ensure the balance is level and secure. Power on the balance, then use a string or wire to attach items to be weighed. Below weighing is used for weighing magnetic materials, large samples that won't fix on the weighing platform or extremely hot or cold sample that would effect the balance's electronics if placed directly on the weighing platform due to thermal heat/cold transfer. Additional applications would be specific gravity determination.
Ohaus digital scale usb drive for storing weighing data
An OPTIONAL PAD7 Auxiliary Display Kit for Pioneer is available. This secondary display can be useful in science and chemistry classroom setting allowing students to see the weight display without being direct over the balance looking at the display. This second display plugs into the RS-232 port on the rear of the balance.

Are you going to be performing density determination of samples? You'll need to purchase the OPTIONAL Ohaus Density Determination Kit. See how to install and use the Ohaus Density Determination Kit. This YouTube video shows the density kit with the Ohaus Explorer but it is somewhat similar to the Pioneer. You'll see exactly what comes with the kit.


Ohaus Pioneer Pro Analytical Balance
Download the User Manual to understand all the functions & features

(select the model & any of the options and then the "BUY HERE" image)

Ohaus Pioneer Pro Balances

Ohaus balances Options (S&H additional for accessories)
PAD7 Auxiliary Display Kit $81.00
Universal Specific Gravity Kit $139.95
Ohaus Density Determination Kit for 0.1/1mg balances $708.00
Lock Down Security Device $80.00
RS-232 Cable, IBM 9 pin $176.00
RS-232 Cable, IBM 25 pin $176.00
WinWedge Std Software Wedge for Windows $437.00
Granite Isolator 13 x 15 inch $599.00
SF40A Printer Impact $902.00
YIB01-OUR Ionizing Blower neutralizes static charges $1499.00
YSTP01 Stat Pen neutralizes static electricity on samples $1575.00
AD-1683 - Static Eliminator $1095.00

  External Weights Weighing Mass Mass Weights External Calibration

Optional Calibration weight and weight sets.
500g ASTM Class 2 (± 2.5 mg) with NO Cert $109.00
500g Calibration Weight Class 1 with NVLAP (± 1.2 mg) $327.00
200g ASTM Class 2 (± 1.0 mg) with NO Cert $87.00
200g ASTM Class 1 (± 0.50 mg) with NVLAP Cert $252.00
1g-500g 12 piece Class 1 Mass Set with NVLAP Cert $2343.00
1g-200g 10 piece Class 1 Mass Set with NVLAP Cert $1210.00
9 pc. Weight Set (100 g - 1 g) Class 1 with NVLAP $1095.00
1mg-100g 21 Piece Class 1 Weight Set with NVLAP Cert $2059.00
Cal-Paks 500g, 50g, 20mg Class 1 with NVLAP $483.00
Cal-Paks 500g, 50g, 200mg Class 1 with NVLAP $483.00
Cal-Paks 500g, 50g, 2g Class 1 with NVLAP $487.00
Weighing Pans
YWP06G Weigh Pan w/ 3.25" Diameter and 0.75" depth $30.00
YWP04G Gem Pan w/ 6.75 inch Diameter with 0.8 inch Depth $30.00

Sartorius Secura Laboratory Balance offer advanced weighing features compliant with the USP minimum sample weight requirements. The balance's display indicates when the minimum sample weight is below the required minimum weight limit.

Secura guarantees high reliability and security in regulated areas for the most common weighing ranges. Quintix is convenience in operation, calibration and data transfer. Even Practum features weighing technology at the highest quality level.
Before you make your final decision be sure to see the Sartorius Entris423-1S or 623-1S milligram balances. The Entris is made in Germany and production will soon be moved to Sartorius' manufacturing facility in Colorado. Watch the video above on the Sartorius Entris Milligram Balance and how easy calibration is when you purchase the optional calibration mass. The Sartorius Entris 3 decimal place balances offer a circular draftshield that you load from the top. See the quick settling time as we place calibration weights on the weighing platform.
The A&D FX500i is an amazing milligram balance that is back with a much longer warranty than the Ohaus PA523. 5 years verses Ohaus is only 2 years. Plus the A&D offers a smaller footprint saving you valuable lab space. In addition, if you are weighing in a hostile environment that is extremely dusty or wet AND Weighing is one of the few balance manufacturers in the world that offers an IP65 rated dust and water resistent milligram balance. If you want internal calibration see the A&D FZ500i Internally Calibrated Balance.
If you are a jeweler or pawnshop buying and selling gold, platinum, palladium or rhodium the PA523 is NOT legal for trade and you will run into a lot of trouble with weights and measures and possibly hefty fines. Don't take chances of being in violation. Instead purchase the A&D FX300iN legal for trade balance with 320 grams weighing capacity that displays to 0.001 grams division and the verification scale division of 0.01 grams. The FX300iN would also comply with pharmacies requiring a Class "A" prescription scale to maintain their pharmacy license when the requirements are a weighing device with a minimum tolerance of 0.1 grains or 6 milligrams.
Sartorius Entris Balance
Analytical Balance    Milligram Balance    precision balance       digital scale
Select from 24 different Pioneer Pro Precision Balances
Model Cap x Read (g) Pan Size Int. Cal Price
PA84 85g x 0.0001g 3.5" ø NO $1469.65
PA84C 85g x 0.0001g 3.5" ø YES $1652.40
PA124 120g x 0.0001g 3.5" ø NO $1763.75
PA124C 120g x 0.0001g 3.5" ø YES $1946.50
PA224 220g x 0.0001g 3.5" ø NO $1959.25
PA224C 220g x 0.0001g 3.5" ø YES $2142.85
PA163 160g x 0.001g 4.7" ø NO $881.45
PA163C 160g x 0.001g 4.7" ø YES $1065.05
PA323 320g x 0.001g 4.7" ø NO $1028.50
PA323C 320g x 0.001g 4.7" ø YES $1212.10
PA523 520g x 0.001g 4.7" ø NO $1225.70
PA523C 520g x 0.001g 4.7" ø YES $1408.45
PA1602 1600g x 0.01g 7.0" ø NO $792.20
PA1602C 1600g x 0.01g 7.0" ø YES $975.80
PA2202 2200g x 0.01g 7.0" ø NO $930.75
PA2202C 2200g x 0.01g 7.0" ø YES $1113.50
PA3202 3200g x 0.01g 7.0" ø NO $1127.95
PA3202C 3200g x 0.01g 7.0" ø YES $1310.70
PA4202 4200g x 0.01g 7.0" ø NO $1274.15
PA4202C 4200g x 0.01g 7.0" ø YES $1456.90
PA2201 2200g x 0.1g 7.0" ø NO $769.25
PA2201C 2200g x 0.1g 7.0" ø YES $936.70
PA4201 4200g x 0.1g 7.0" ø NO $902.70
PA4201C 4200g x 0.1g 7.0" ø YES $1071.85
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