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Sartorius Monolithic Weigh Cell
[Click for Hi-Res Image]

The heart of Sartorius' unmatched performance is the one piece monolithic weigh system.
Sartorius GC803S Balance
sartorius gc803s balance
All the features of the Sartorius CP Series Analytical Balances at a fraction of the cost.

The GC803S high precision carat balance with internal calibration, RS-232 interface and the new innovative triangular weighing pan shape.  New design, developed for professional use in a wide range of analytical and precision weighing applications.  Equipped with the very latest in weighing technology, The Monolithic Weigh Cell - characterized by fast response times, excellent repeatability and exceptional mechanical ruggedness.

The Sartorius GC803S features a 0-800ct x 0.001ct for weighing precious gem stones.  The GC803S offers 16 weighing function so it's perfect for measuring in grams with the specs 0-160g x 0.2mg to meet just about any weighing application

  Engineered in Germany, assembled in Arvada, Colorado and backed by a 2 year manufacturer warranty by Sartorius North America located in Edgewood, New York.
Sartorius is a German company and maker of some of the world's finest balances since 1871 when they introduced the world's first pharmaceutical balance.  Only Sartorius shatters the limits when "the Guinness Book of World Records" listed the Sartorius Model 4108 as the most accurate balance in the world.  Sartorius has been proving their trustworthiness thanks to their top-of-the-line technology that ensures maximum accuracy.  Sartorius products are manufactured with ISO9001 standards and have the CE mark.  Sartorius' excellent reputation and image in the technologically sophisticated field of weighing balances make them a global leader.  Sartorius' endeavors to expand its traditionally outstanding position on the market for laboratory weighing balances now targets the jewelry and geologist marketplace.

The GC803S is the ultimate analytical balances for the lapidary marketplace.  The GC803S has very similar features to the Sartorius CP124S and CP224S Analytical Balance, but sold for hundreds less.  Basically, the gem market place is extremely price sensitive market sector verses the laboratory marketplace so Sartorius developed the GC803S with a special price to meet the pricing requirements for the jewelry marketplace.  Whether you're weighing diamonds or chemical compounds the GC803S weighs from 0 to 800 carats (0-160 grams) weighing capacity in 0.001 carats (0.2mg) intervals. 

One feature that we really like is low profile design of the GC803S resulting in less bench space compared to the Sartorius CP Analytical Balances.  The height from pan to top of glass door is only 6.37 inch high with the GC803S verses for example the Sartorius CP124 is 9.13 inch in height from the pan to top of glass.  We see a lot of images in trade magazines showing analytical balances with tall weigh chambers having a large glass flask or beaker, but these photos are not really practical since the weight of the beaker/flask would typically exceed the weighing capacity of the balance especially if the beaker/flask is even half way filled with liquid. 

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 glass beaker weighing 70 grams and you place it on the weighing pan, pressed the tare button, the GC803S would then display 0.0000g.  You would now have 110 grams weighing capacity left in the fine range (160 - 70 = 110g.)  The point we are trying to stress is having a tall draft shield "typically does not offer you any benefits".
monolithic weigh cell  In the real world most people are using polystyrene weigh boats and beakers that weigh much less than glass, thus allowing you to weigh your solutions and compounds which is really the objective of using the balance.

The GC803S 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 "monolithic" weigh cell technology has been expanded to the GC803S.  The monolithic block is made from one piece of a special metal that is robotically etched, resulting in a more rugged design with high-level weighing results and less sensitivity to temperature fluctuations.  With this patented system, Sartorius sets the technological standards ­ for the new millennium. 

The Monolithic Weigh Cell 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.

The GC803S is Discontinued Replaced by GCA1603P

Capacity x Readability (carats)

0 - 800 x 0.001 ct

Capacity(g) x Readability (mg)

0 - 160 g x 0.2 mg

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

± 0.001 ct
± 0.2 mg

carats (ct)
milligrams (mg)

  ± 0.002 ct
± 0.4 mg

Response Time (average)

2 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 memory, net total, weighing in percent, counting, averaging
Display Update

0.1 - 0.4 seconds depended upon filter level selected


LCD with backlit

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)

± 1 ppm / °C

Motorized Internal Calibration


External Calibration

100g Optional

Pan Size

ø80 mm / 3.1 in
(inner diameter)*

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

162 mm / 6.37 in

Dimensions (entire balance)
W x D x H

213 x 342 x 270 mm
8.4 x 13.5 x 10.6 in

Built-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.  Sartorius recommends to complete the balance with the density kit YDK01 and modify the balance with a higher weighing chamber for more space in handling the sample.
AC Power Source

AC Adapter 120 VAC

Power Consumption

Approx. 16VA (supplied by AC adapter)

Standard Equipment

120V AC Adapter, RS-232 interface, Stainless steel weighing pan, internal motorized calibration

Optional Accessories

Printer, RS-232 cable, Carrying case, Rechargeable external battery pack, SartoConnect data transfer software, external calibration mass


2 years manufacturer's warranty

Net Weight, Approx.

5.2 kg / 11.5 lbs.

Click image to learn more about features

GMP/GLP Printout - Click for more info   LCD Backlit - Click for more info   Internal Calibration - Click for more info   RS232 Standard - Click for more info   Below Balance Weighing - Click for more info

Download the Instruction Manual for the GC803S download manual.  The instruction manual contains detail information regarding calibration, additional features and keypad functions.

sartorius jewelry balancebalance weighing platform
* GC803S Triangular weighing pan shape:
ø = Diameter of the inner circle. Triangular weighing pan shape the shaded area is completely available for use in addition

Sartorius High-resolution  balance
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High-resolution balance made affordable.  The removable glass draft shield is an engineering marvel.  Sartorius GC803S comes standard with 120V AC Adapter, gem pan, & dust cover.  The GC803S features a motorized internal cal and calibration is a simple press of the button from the keypad.

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
sartorius quality balances
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  Sartorius balance weighing chamber
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Side view shown weighing chemicals with a 3 5/16 x 3 15/16 medium polystyrene weigh boat.  The triangular weighing pan and wide draft shield allows you plenty of room.  The 2 front adjustable feet make leveling the balance a cinch.   All-glass draft shield has smooth-action doors that open extremely wide.  The large weighing chamber enables fast and reliable positioning of any type of sample.  All parts of the weighing chamber base can be removed, to facilitate quick and easy cleaning.
sartorius  131 heartland edgewood ny
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  sartorius lab balance
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Dust cover is included as standard equipment to keep your high precision balance spotless when not in use.   Catches the eye at first glance is the distinctive display.  Backlit in blue, with high contrast and exceptionally large numbers (16.5 mm), it is easy to read under any lighting conditions.  The intensity of the backlighting can be adapted to individual preferences.
sartorius analytical weighing
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  sartorius weighing balances
[Click for Hi-Res Image]
The GC803S is designed to be used with the glass draft shield, but sometimes it's hard to get large items in the weighing chamber.  A good example would be weighing 8" silicon wafers.   Image taken from the rear of the GC803S shows standard RS-232 interface and view of draft shield.  Lock-down bracket to secure your precious Sartorius balance.

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