Precision Weighing Balances
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The Sartorius GD603 has been discontinued and no longer in production as of May 2013. The Sartorius GD603 was phased-out and replaced with the Practum 124-1S or Quintix 124-1S. We have no remaining stock on the GD603 and all information displayed herein is for archival and support purposes only.

Sartorius GD603 analytical balance was the first generation analytical in the Sartorius GD series. Since the GD603 was released, a new and improved balance has become available and offers a much better value for the money. This analytical is the Sartorius GD503. The GD503 increments in 0.1mg while the GD603 is only to 0.2mg.

Unlike the GD603, a Sartorius GD503 is legal for trade, which is required by jewelers looking to weigh their gems and sell jewelry by weight. Aside from the NTEP approval, the GD503 offers 100 g x 0.0001 while a GD603 weighs 121 g x 0.0002 g. That's right, you get twice the accuracy and will spend less money when you select a GD503 from Sartorius.

The GD-603 analytical balance for the lapidary marketplace. Another applications could be specialty pharmacies in compounding medicine (always check with your pharmacy licensing board since requirements vary from states to state but at 0.2 milligram readability the GD-603 offers even greater readability for many states). The GD-603 comes standard with a bi-directional RS-232 interface so you can connect the balance to an optional Sartorius Printer or your computer for a paperless data collection application.

Beautiful balance by Sartorius - that's only how we can describe this balance. Whether you're weighing diamonds or chemical compounds the GD-603 offers 121 gram weighing capacity and increments in 0.2mg intervals, plus the RS-232 interface and 100 gram ASTM class 1 external calibration is included.

The GD603 is very similar to the Sartorius GC503 but the GD603 offers a new body style that is ergonomically designed with a sleek look and rounded corners. Below are images of the GC503 for reference to help you in your purchasing decision.

At no time can the total mass on the platform exceed the weighing capacity of the balance, no matter what balance you purchase. Therefore, if you had a pan weighing 10 grams and you place it on the weighing platform, pressed the tare button, the GD-603 would then display 0.0000g. You would now have 111 grams weighing capacity left (121 - 10 = 111g.)

The GD-603 produces steady readings using the high stability mode and the unique Sartorius weighing system even if the environmental conditions are not ideal for precision weighing. The Double Lever System, or DLS, for short based on its special force transmission design. With this patented system, Sartorius sets the technological standards ­ for the new millennium. Just like the proven monolithic systems in Sartorius' CP Series and Master proSeries balances, this new "small" system is cut from a single block of a special, highly rugged aluminum alloy using high-speed 21st century milling technology. The double lever principle offers two decisive advantages: the design in the area of the pan linkage is highly resistant to mechanical stress and therefore has exceptionally high mechanical stability, and the system is about half the size of the monolithic block cell, allowing for a smaller footprint. Like the monolithic weigh cell, it is cut from a single block of aluminum and no screw fasteners are needed between functional parts. This keeps the system less sensitive to fluctuations in temperature, and with fewer parts there is less chance of failure.

The Monolithic DLS system offers unbeatable advantages for daily use like Incredibly fast response time and Unfailing reliability and near-zero susceptibility to interference. The reasons for these considerable advantages are two fold: the number of individual parts has been reduced by more than 70% and the mechanical construction has been designed to last for years of trouble-free operations.

Sartorius Mechatronics GD603

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Brand Model Capacity Readability
Sartorius Mechatronics GD603 121 g 0.2 mg
Add. Features
  • Carats
  • Grains
  • Milligrams
  • Pounds
  • Ounces
  • Pennyweight
  • Grams
  • Troy Ounces
  • KiloGrams
  • Parts Counting
  • RS-232c
Comparable Scales

A&D Weighing GH-120 analytical balance - $2832.00

Scientech ZSA120 analytical lab balance - $1524.00

A&D Weighing HR-60 analytical balance - $1502.00

Sartorius cubis analytical MSE124S-100-DU - $4909.50

Sartorius Secura124-1S analytical - $2806.95

Sartorius Entris64i-1S Internal Cal - $1654.40

Sartorius USB sartorius cable - $159.99

Sartorius ENTRIS64-1S Analytical Balance - $1235.20

Scientech ZSA80 Analytical Balance - $1395.00

A&D Weighing HR250AZ pharma balance - $1967.00

Sartorius Secura324-1S Lab Balance - $3638.56

A&D Weighing HR150AZ lab balance - $1810.00

Sartorius ENTRIS124-1S Lab Balance - $1462.40

Other Brands 21 Pc Weight Set Class 1 - $2059.00

A&D Weighing GR-120 laboratory scale - $2261.25

Sartorius Practum 224-1S lab balance - $1794.50

Sartorius Quintix 124-1S analytical lab balance - $2501.21

Sartorius Calpak calibration weight set 100g, 10g, 200mg - $331.00
MSRP: $1995.00
YOU PAY $1429.00
Your Price $1429.00
The GD603 has been discontinued since May 2013. No remaining stock is available.

For alternative models we recommend the Sartorius Entris64-1S or Entris124-1S.
Capacity x Readability (carats)

605 x 0.001 ct

Capacity(g) x Readability (mg)

121 g x 0.2 mg

Reproducibility (std deviation)
carats (ct)
milligrams (mg)

± 0.001 ct
± 0.2 mg

carats (ct)
milligrams (mg)

± 0.002 ct
± 0.4 mg

Response Time (average)

3 seconds

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

0.1 - 0.4 seconds depended upon filter level selected



Allowable Ambient Operating Temperature 5° C to 40 ° C (41° F to 104° F)
85% RH or less
Sensitivity Drift
(10° - 30°C/50°F-86°F)

± 2 ppm / °C

External Calibration


Pan Size

ø90 mm / 3.5 in
(standard round pan)

Draft Shield Chamber Height
(from pan to top of glass door)

133 mm / 5.23 in

Dimensions (entire balance)
W x D x H

200 x 270 x 233 mm
7.9 x 10.6 x 9.2 in

Built-in RS-232 Interface

YES - RS-232 interface is standard but the RS-232 cable is optional

Weighing Below Not Available.  Common applications for weighing below the balance include density determination.
AC Power Source

AC Adapter 120 VAC

Power Consumption

Approx. 16VA (supplied by AC adapter)

Standard Equipment

120V AC Adapter, Stainless steel weighing pan, 100g external cal mass

Optional Accessories

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


2 years manufacturer's warranty

Net Weight, Approx. 2.8 kg / 6.2 lbs.
Sartorius lab balance Brochure Sartorius lab scale Download the brochure loaded with tons of information.
Sartorious balance User Manual lab scales Download the Instruction Manual for the GD603 loaded with tons of information.
The GD603 in NOT Legal for Trade.  If you will be selling at the Tucson Gem Show you'll positively need a Legal of Trade Carat Balance and you should buy the GD503 instead.  The GD503 looks similar to the GD603 but the GD503 is a Class II, NTEP Approved, Legal for Trade Carat Scale and you can read more about the GD503 HERE.

sartorius scale GD603 balance using usb interface to computer
Shown above is the Sartorius GD603 Precision Diamond Scale interfaced with a laptop.
"We did not invent the product, but we made it better" is a famous quote from BASF and we feel the same with our new RS-232 to USB converter kit for Sartorius Balances exclusively found at Precision Weighing Balances.  Your Authorized Sartorius Dealer and known throughout the world for deep discount prices.

Our USB to Serial Adapter kit for Sartorius Balances (our part # SARUSB) offers you the best of both world.  If you want to interface the Sartorius Scale with a RS-232 serial port you simply disconnect the 1 foot RS-232 to USB cable.scale usb cable

Eliminate IRQ conflicts by going USB.  Connect your Sartorius balance to any PC running the Windows OS using HyperTerminal or purchase a third party software wedge.  We offer step by step instructions how to use HyperTerminal here.

This kit's only $109.99 and it's custom made for

Pictured above is the Sartorius GD603.  The GD603 is very similar to the Sartorius GC503 but the GD603 offers a new body style that is ergonomically designed with a sleek look and rounded corners.  The GD603 also comes standard with a bi directional RS-232 interface allowing communication to a pc or Sartorius printer.  Below are images of the GC503 for reference to help you in your purchasing decision.
Sartorius High-resolution  balance
High-resolution balances made affordable.  High stability with very fast response for operator comfort and efficiency.  Comes standard with 120V AC Adapter, gem pan, & dust cover.  Class F1 external 100 gram cal mass is included.
Sartorius analytical balance   Sartorius balance weighing chemicals
Image taken from the rear of the GC-503.  Features include bubble indicator to help leveling the balance with the 2 front adjustable feet.  Lock-down bracket to secure your precious Sartorius balance.   GC-503 shown weighing chemicals with a 3 5/16 x 3 15/16 medium polystyrene weigh boat.  Polished stainless steel weighing pan, ring and floor makes cleaning simple.
sartorius glass weighing chamber   sartorius balance with calibration weight
Innovative high-grade draft shield with low profile design resulting in less bench space compared to conventional analytical balances (height from pan to top of glass door is only 5.23 inch).  Draft shield offers 3 sliding doors that slide open quietly and effortlessly.   120V AC Adapter, gem pan, & dust cover are all standard with the Sartorius GC-503
sartorius analytical weighing display   sartorius weighing balances
Easy-to-clean display field that is highly resistant to chemicals.  High contrast LCD (height of digits: 13 mm / 0.5")   Keys with positive click action for reliable and confident activation of specific functions.  Keypad holds its shape even after repeated use.  Toggles between two selected weigh units at the touch of a key
sartorius quality balances   sartorius lab equipment
Spectacular packing insures your analytical balance is delivered without damage.   Styrofoam packing surrounds your Sartorius Analytical Balance lessen the chances of any damage due to rough handling by the shipping carrier.  Like we always say - to the shipper like UPS, fragile means football and the Sartorius is designed to handle the delivery.
sartorius weighing chamber
Easy-access, all-glass weighing chamber and easy-to-remove and easy-to-clean high-grade stainless steel weighing pan.  Weighing chamber base plate is easy to clean because all parts can be simply removed

specific gravity kit
density kit
specific gravity kit
Low cost aftermarket optional specific gravity kit is available for $139.95.  The kit includes all the items shown below. Read more about this product here and how it works.
density determination kit

Select from many different jewelry scales to suit your weighing needs
Cap x Read
Pan Size
Your Price
0-100 g x 0.1 mg
3.5 Ø inches
AC Only
0-120 g x 0.1 mg
3.5 Ø inches
AC Only
0-210 g x 0.01 g
4.6 Ø inches
AC or Battery
0-410 g x 0.01 g
4.6 Ø inches
AC or Battery
0-510 g x 0.01 g
4.6 Ø inches
AC Only
0-810 g x 0.01 g
4.6 Ø inches
AC or Battery
0-1300 g x 0.01 g
6.85" x 5.63"
AC Only
0-2100 g x 0.01 g
6.85" x 5.63"
AC Only
0-810 g x 0.1 g
6.85" x 5.63"
AC or Battery
0-2100 g x 0.1 g
6.85" x 5.63"
AC or Battery
0-4100 g x 0.1 g
6.85" x 5.63"
AC or Battery
0-7100 g x 0.1 g
6.85" x 5.63"
AC or Battery

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