Sartorius CPA323S accurate balance

320 g x 1 mg

Sartroius CPA323S precision digital milligram lab balance has a capacity of 320 grams and a readability of 1 milligram.

Availability: 0 left in stock. Discontinued

MSRP: $2,490.00

YOU PAY: $1,992.00

You save $498.00

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The Sartorius CPA323S has been discontinued and no longer in production. The information below is for reference only for those people researching the specification if they already own the lab balance. The CPA Series was discontinued as of May 2013 and there are no available parts available so if you have a broken CPA we recommend you buy a new laboratory balance. Sartorius replacement model for the CPA323S is the Sartorius Quintix313-1S. We have no remaining stock on the CPA323S and all information displayed herein is for archival and support purposes only. Award winning design and technology is built into every Sartorius balance and the Sartorius CPA323S (320 x 1mg) packs a punch. Sartorius laboratory balances deliver high sensitivity, yet it's rugged, durable and delivers consistently accurate results in the shortest time. The Sartorius CPA Milligram Balances features triangular weighing pan adding 27% more surface space for samples compared to previous models, large LCD with backlit display and the exclusive Sartorius Monolithic Weighing Cell. The triangular chamber doors can easily be removed for cleaning as needed.

All CPA Series balances feature isoCAL for motorized internal calibration. isoCal allows the balance to be preset to perform calibration automatically or prompts user to calibrate.

The new Sartorius CP generation of the field-proven Sartorius Competence series of laboratory balances, whose reliability has won over many users in their daily lab procedures, sets the standards yet again in technology, quality and features.

The combination of high-performance technological features in every CPA precision balance with a rugged, built-to-last design ensures the best possible accuracy in continuous laboratory use.

Every CPA precision balance has exactly the performance features that are required for fast and professional processing of weighing tasks, including four digital filter levels for adapting the balance to the place of installation, for example, and an RS-232C interface port for communication with a computer.

Built-in, user-friendly application programs provide valuable support for advanced requirements, such as weighing in percent, net-total formulation, animal weighing, mass unit conversion and counting.

All Sartorius CPA Milligram Balances feature:

  • digital scaleBuilt-in, motorized calibration weight ensures the highest accuracy at the press of a key
  • electronic balanceisoCAL calibration and adjustment function; facilitates regular, fully automatic calibration and adjustment to ensure the consistently high accuracy of the balance
  • affordable scalesInnovative, patented monolithic weigh cell for outstanding performance
  • precision weighingLarge backlit display (digit size: 16 mm); read off results without error regardless of ambient lighting conditions
  • balancesISO/GLP-compliant documentation (in combination with the optional Sartorius data printer or a PC)

The entire construction of the Sartorius CPA with its powerful core, the monolithic weigh cell can stand up to the abuse of tough daily use. The same goes for the control keys, the components on a balance that are most frequently used. Even after they have been pressed tens of thousands of times, they will continue to work precisely just like they have from day one, with positive click action for reliable activation of their respective functions.

Sartorius is the choice when you need superior weighing technology and Precision Weighing Balances is your authorized distributor for the full Sartorius laboratory balances at discount prices.

Sartorius typically has no inventory so it is probably best that you call us prior to placing an order so we can check if there is stock. Sartorius' typical lead time is 5-7 days to build the CPA323S. If you can work with this lead times place the order on line, but if you cannot work with these lead times it is best to call us and we can offer you equivalent balances from other manufacturers which are in stock. We do stock the A&D FZ300i (320g x 1mg) and A&D FZ500i (520g x 1mg) if you need a milligram balance shipped today.

See the full line of Sartorius CPA milligram balances HERE.
Capacity x Readability

0-320 g x 0.001 g


± 0.001 grams

Linearity (g)

± 0.002 grams

Response Time (avg)

1.5 seconds

Tare Range FULL to Capacity
Selectable Weight Units g, kg, ct, lb, oz, ozt, tlh, tls, tlt, Gn, dwt, mg, /lb, tlc, mom, K, tol, bat, and MS.
Selectable Application Programs Mass unit conversion by toggling, tare, net total, weighing in percent, counting, averaging
Display Update

0.1-0.4 seconds depending on filter level selected


LCD with backlit

Allowable Ambient Operating Temp 0°C to 40°C (32°F to 104°F)
85% RH or less
Sensitivity Drift

± 2 ppm / °C

Internal Calibration

isoCAL - Motorized Internal Calibration

External Calibration

200 g Optional

Pan Size
3 side weighing pan

ø110 mm / 4.3 in
(inner diameter)*

Draft Guard Chamber Ht

50 mm / 1.97 in (from pan to top of glass)

Dimensions WxDxH
(entire balance)

213 x 342 x 153 mm
8.4 x 13.5 x 6.02 in

RS-232 Interface


Weighing Below A port for a hanger for weighing below the balance is available.  You can attach a sample using a suspension wire, for example.  Common applications for weighing below the balance includes density determination.
AC Power Source

AC Adapter 120 VAC

Power Consumption

Approx. 16VA (supplied by AC adapter)

Standard Equipment

120V AC Adapter, RS-232 port, weigh below hanger, draft shield

Optional Accessories

Printer, RS-232 cable, RS-232 to USB converter kit, Carrying case, Rechargeable external battery pack, WinWedge data transfer software, external calibration mass

What's included
AC Adapter
User Manual
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Additional Info
Additional Info
Brand Sartorius
Capacity x Readability 320 g x 1 mg
Readability 0.001 g
Weight Modes Carats, Grains, Milligrams, Pounds, Ounces, Pennyweight, Grams, Troy Ounces, KiloGrams
Functions Averaging, Formulation, Percent Weighing
Features Parts Counting, RS-232c, Internal Calibration
Legal for Trade No Legal for Trade
Construction Solid Diecast Metal Base Housing, Stainless Steel Weighing Pan, Magnetic Force Motor Monolithic Weigh Cell
Calibration Motorized automatic internal calibration
Communication RS-232, Aftermarket DB9 RS-232 Adapter Converter with USB Cable can be purchased
Platform size (inches) 4.3 diameter
Power Requirements 120V AC Adapter included
Manufacturer Warranty (years) 2
Additional info Large blue backlit display can be adjusted to user's preference
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