Precision Weighing Balances
Your online source for balances, scales & calibration weights @ discount prices

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Class II NTEP approved balance. The ZSP400NJ is a milligram scale that can weigh to 1mg each and every time with little effort. In addition, it is a very hardy scale that is very resistant to damage or abuse. Why settle for less with a foreign made product when you can have all this plus be able to talk with the manufacturer right here in the USA. The ZSP-400NJ gem balance is legal for trade at a 0.01 g readability, but also offers a 0.001 readability for weighing applications that do not require NTEP approval.

Scientech Zeta Series digital scales offer a revolutionary weighing technology with a patent pending that no other balance manufacturer can match. This weigh sensor found only in the Zeta Series offers a very fast response time with excellent repeatability and linearity weighing results. Many of our customers say that the Zeta models are quicker and far more stable than other brand competitor's models implementing a lever designed weigh cell.

Many people call us with the question - what is the best balance to buy? This is so simple now with the Zeta Series since it is all in the weighing sensor design and the company that builds the balance.

Another deciding factor on selecting a balance to buy is issue is repairability. Many of the balances on the market can't be repaired if you put an excessive load on the weighing pan, but you can with Scientech and at a REASONABLE price. High quality, high performance, and low cost, are the issues that make us say Scientech offers truly a real value over all other brands.

Here are some additional reasons why Scientech is your Measure of Confidence:

  • 100% American owned and operated for over 44 years
  • All products Made in the USA
  • Patent pending on the Zeta weighing technology that is repairable.
  • Very robust weighing sensor with, Excellent linearity and Superior repeatability
  • 5-year North American warranty on Zeta models
  • Compact foot print
  • Very large LCD display with larger numerals
  • State-of-the-art (ISO9001) registered manufacturing plant in Boulder, Colorado
  • TQC (Total Quality Control) manufacturing
  • Five-day turnaround for factory service. When you call Scientech at 303-444-1361 within 1 phone call you'll speak with the people who made your balance.
  • Various voltage configurations available for no extra charge
  • All models manufactured to UL/CSA/CE conformity standards
  • Expansive list of standard features
  • We feel Scientech offer the best customer & product support in the industry. Customer satisfaction is their primary goal.
  • Scientech will listen to the customer's needs especially for OEM applications. If you're looking for just the weigh cell without the case for a custom application give us a call at 978-521-7095 and we can quote you at affordable prices.

Scientech is synonymous with high quality, accuracy, durability, and user-friendly standard features. All models possess Scientech's exclusive real time temperature compensation software, enabling the scale to yield accurate, reproducible results without the need to recalibrate the scale as the ambient temperature varies.

To see comparisons of all the ZSP Series models click here.

Scientech ZSP400NJ Milligram Scale

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Brand Model Capacity Readability
Scientech ZSP400NJ Milligram Scale 400 g 0.001 g
Add. Features
  • Carats
  • Ounces
  • Pennyweight
  • Grams
  • Troy Ounces
  • Legal For Trade
  • Parts Counting
  • RS-232c
  • NTEP Class II
Comparable Scales

Sartorius Quintix 513-1S milligram balance - $2635.00

A&D Weighing EK610-J NTEP Class II Scale - $620.00

Sartorius Practum 313-1S milligram balance - $1172.90

Sartorius Secura 513-1S milligram - $2843.25

Sartorius ENTRIS 423-1S chemistry balance - $1003.20

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

Scientech Jewelry Scale ZSE250 - $1795.00

Ohaus AX423N NTEP Class II Int Cal - $2104.60

Ohaus EX423 electronic lab balance - $2877.25

Scientech ZSP400NP Pharmacy Balance - $1544.00

Sartorius ENTRIS 623-1S Milligram Balance - $1191.00

Mettler Toledo JL602-GE Class II NTEP Scale - $599.00

Ohaus SJX323N/E Class II Carat Scale - $499.25

Mettler Toledo JS1603C/A diamond scale - $2625.00

A&D Weighing FX700CT Milligram Balance - $999.97

Ohaus SJX1502N/E NTEP Class II - $290.99

A&D Weighing FX200iN NTEP Approved Legal For Trade - $821.10

A&D Weighing FX300iN NTEP approved class 2 scale - $863.80
MSRP: $1895.00
YOU PAY $1544.00
Legal-For-Trade Jewelry Scales

Please note that the Zeta Series exclusively from Scientech has a weighing sensor with a suspension system which cannot be broken by customer abuse or by dropping a weight onto the weighing pan. As you might know, the highest failure mode for any milligram (1mg) balance is a broken suspension system due to them having fragile pivots, pullers, flexures, or bearings. Then when any weight is dropped on the weighing pan (this is called shock loading) or by user misuse, these fragile pivots, pullers, flexures, bearing will break. The way competitor brands try to handle this concern is to state that they have "overload" protections. However, overload protection does not protect against shock loading or customer abuse. Therefore, the damaged scale is not covered under warranty and you are forced to pay high repair charges.

Click the play button below and the streaming video sells the balance itself. 
The closest we have seen to an Unbreakable Balance.  Please don't try this with your Mettler Balance or Ohaus Balance since we think it might break. The performance depicted in the video can only be achieved when you choose the Scientech Zeta Series for your next lab balance. This is the ZETA Series and this demonstration was shown at Pittcon 2006.

Zeta ZSP-400NJ Legal For Trade Precision Milligram Balance
Capacity x Readability(g) 400g where d=0.001g, e=0.01g
Capacity x Readability(ct) 400ct where d=0.001ct, e=0.01ct
Capacity x Readability(dwt) 257dwt where d=0.001dwt, e=0.01dwt
Capacity x Readability(ozt) 12.8ozt where d=0.0001ozt, e=0.001ozt
Capacity x Readability(oz) 14.1oz where d=0.0001oz, e=0.001oz
WEIGHING MODES grams, carats, pennyweight, oz, troy oz
DATA INTERFACE Standard RS232C bi-directional interface.  Baud rates of 300, 600, 1200, 2400, 4800, 9600, 19200
Legal for Trade YES -  CofC 07-017
Class 2 Balance
PAN SIZE Circular 4.5" Diameter
POWER SUPPLY 100-240 VAC (47-63Hz) with 115 volt wall connector linecord
WINDSCREEN (inches) Standard - Windscreen, 3.5" high x 6" dia. Circular windscreen Optional - part # 5000-61 , 9.5" high glass Analytical windscreen with 3 doors.
HOUSING (inches) 7.5"W x 11.25"D x 3.25" H
Standard Accessories Manual, AC Adapter, RS-232C data interface
Optional Accessories Rechargeable battery kit, External Calibration mass, Printer
External Calibration Mass (optional) 200g or 400g
Warranty 5 year manufacturer limited warranty within North America from the date of delivery

Download the Instruction Manual (1.2 MB) now download manual  You need Adobe Acrobat Reader to view.  The instruction manual contains detail information regarding calibration, additional features and keypad functions.

Special note - the Zeta Series DOES NOT offer the weigh below feature used to weigh beneath the balance for weighing larger objects.  For those customers needing these features please review and buy the Scientech SP500 here.

Scientech ZSP Milligram Balances

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

Optional Calibration Weights
  External Weights Weighing Mass Mass Weights External Calibration

300g ASTM Class 2 (± 1.5 mg) with NO Cert $87.00
300g ASTM Class 1 (± 0.75 mg) with NVLAP Cert $204.00
200g ASTM Class 2 (± 1.0 mg) with NO Cert $87.00
200g ASTM Class 1 (± 0.50 mg) with NO Cert $89.00
200g ASTM Class 1 (± 0.50 mg) with NO Cert $151.00
200g ASTM Class 1 (± 0.50mg) with NVLAP Cert $252.00
100g ASTM Class 2 (± 0.50 mg) with NO Cert $72.00
100g ASTM Class 1 (± 0.25 mg) with NVLAP Cert $145.00
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 200g, 20g, 200mg Class 1 with NVLAP $379.00
Cal-Paks 200g, 20g, 2g Class 1 with NVLAP $386.00

Add Motorized Internal Calibration for ease of calibration $500.00
Add Below Balance Weighing to conduct specific gravity and density measurements $200.00
Battery Kit, 115V Rechargeable (incl. charger, battery & inverter) $395.00
Foot Switch - TARE [factory installed] $250.00
Foot Switch - SEND DATA [factory installed] $250.00
Printer, dot matrix, RS232 with interconnecting cable $695.00
Windscreen, 9.5" high glass Analytical windscreen with 3 doors $350.00
Custom weight register "A" (specify desired unit of measure) $40.00
density determination kit for balancesCable, 6' null modem, for connecting to PC's (DB9 male to DB9 female) $50.00
Cable, 6' null modem, for connecting RS232 serial printers (DB9 male to DB25 male) $50.00
Dust Cover for ZSE and ZSP models $40.00
Low Cost Aftermarket Universal Specific Gravity Kit $139.95
AD-1683 - Static Eliminator $1095.00
WinWedge Std Software Wedge for Windows $259.00

Weighing Sample Pans
YWP06G Weigh Pan w/ 3.25" Diameter & 0.75" depth $30.00

What is so great about this weighing sensor?  Here is the explanation for how the Zeta Series sensor differs from all other balances on the market today.

Weighing cells use a parallel guidance system in conjunction with some type of detector, ie. an electromagnetic force restoration (EMFR) detector or a strain gauge detector.  The advantage of the EMFR detectors is high resolution.  The disadvantages are its lever, couplers, and flexures that can be easily damaged or broken, which results in costly repairs.  The advantage of the strain gauge detectors is that they are rugged.  The disadvantages are its poor resolution. 

The Zeta Series bridges the gap between the EMFR detectors and the strain gauge detectors.  Each Zeta model has high resolution since is it an EMFR detector but also it is very rugged since it does not have a lever, couplers, or flexures.

The foundation for this new technology is based on a direct-loading weighing cell concept, which differs dramatically from a normal lever or mono block sensor design.  When used in combination with Scientech's unique and unequalled displacement detection system and digital servo, the result is a high quality, weighing sensor offering speed, accuracy and repeatability you demand for your weighing application.

The Zeta Series is one of the most robust balances on the market and will not normally suffer suspension damage during shipment like many other brand balance are exposed to especially with all the rough handling with the shipping carriers like FedEx and UPS.  Unlike other competitor brands Scientech balances can be repaired.  Typical turn around is within 5-business days.  We can't list that other brand name balance since they will file a lawsuit against us but ask them - can your balance be repaired if the weigh cell is damaged?  You'll be surprised when they tell you NO and you need to buy a new balance but that is not the case with Scientech.

Select from 10 different Milligram Balances to meet your weighing needs

Cap x Read (g)

Draftshield Price
ZSP-150 150 x 0.001 Circular 6 inch diameter x 3.5 inches high $1195
150 x 0.001
150 x 0.01
Circular 6 inch diameter x 3.5 inches high $1350

250 x 0.001

7.5”W x 8.25”D x 9.5”H with 3 sliding glass doors $1795

250 x 0.001

Circular 6 inch diameter x 3.5 inches high $1295

350 x 0.001

Circular 6 inch diameter x 3.5 inches high $1395
400 x 0.001 Circular 6 inch diameter x 3.5 inches high $1544
400 x 0.001
400 x 0.01
Circular 6 inch diameter x 3.5 inches high $1544

500 x 0.001

Circular 6 inch diameter x 3.5 inches high $1575

40 x 0.001
400 x 0.01

Circular 6 inch diameter x 3.5 inches high $1485

100 x 0.001
500 x 0.01

Circular 6 inch diameter x 3.5 inches high $1599
Precision Weighing Balances is an Authorized Scientech Dealer.  All Scientech Balances are made in Boulder, Colorado.  Support American jobs an buy Scientech.  The beauty of buying Scientech is if you ever have a problem with your balance you can speak with the same people who built your balance.  In the unlikely event you need to repair your balance Scientech offers a Five-day turnaround for factory service.

lab balance
scientech lab balances

analytical balanceThe ON/OFF button is located in the upper left corner of the balance's front panel.  When the balance is ON the balance automatically runs a power-up self check.

analytical scaleThe RANGE/FUNCTION Button:
Single Range Balance Models:

Pressing the RANGE/FUNCTION button begins the following menus cycle:
PCS Front panel parts counting
HI OK LO Checkweighing
CAL 1 Auto calibration
CAL 2 Linearity
scientech Live animal weighing
% - percent weighing

To select the desired function, press the MODE switch when it appears on the display.
Note: Front panel parts counting is not available with bi-directional RS-232 enabled.

lab balance

The ZERO Buttons:

There are two (2) ZERO buttons.  Pressing either button at any time returns the display to zeros.  When a weighing that has been zeroed out is removed from the weighing pan, a negative reading is displayed.  To return the display to zeros, press one of the ZERO buttons.
high precision weighingThe MODE Button:

Pressing the MODE button starts the unit of weight cycle as follows: grams(g), kilograms(kg), milligrams(mg), pounds(lb), carats(ct), pennyweights(dwt), troy ounces(ozt), and ounces(oz).  When the desired unit of weight appears, press the MODE button a second time to select that unit of weight.

An optional, factory installed, user specified, custom unit of measure is available.  If you have this special unit of measure feature in your balance, (A) appears in the unit of weight cycle after ounces.  Press the MODE button to select this function.
zeta laboratory scaleThe SEND Button:

Pressing the SEND button sends the information on the balance's display to an external device via the RS-232 interface.

Note: Scientech balances are DTE (computer) devices.  If communicating to another DTE device (ie computer), a Scientech RS-232 cable, PN11897, or normal null modem cable is required.  If you are communicating to a DCE device (printer), a serial cable is required.  Scientech offers a serial cable for your convenience.

You may send the time and date along with the weight reading when you press the SEND button or you may send weight readings automatically at user specified time periods (see the Bi-directional RS-232 Command Set, Type 4 Commands section for details).  Weight readings may also be sent to a computer or printer continuously every 200 milliseconds (see the RS-232 Front Panel Configuration section for details).  Weight readings may be sent automatically when the balance reaches stability (see Selectable Filters section). An optional, factory installed, remote foot send switch is also available.
scientech zeta balance
Capacity Tracker
weighing capacity indicatorThis dynamic graphical display automatically depicts the used and unused portions of your weighing range.  The tracker is indispensable in taring out container weight and then weighing several components sequentially.  You always know how much capacity remains.

Each segment represents 10% of the balance's total capacity.  As 10% of the balance's capacity is used the first segment will illuminate.  As 20% of the balance's capacity is reached the second segment will light and so on.
Stability Indicator
scientech weighing balanceThe balance tells you when the reading is valid, insuring reliable results.  Stability sensitivity is user selectable which allows you to customize your balance setup.  You may disable the indicator at any time.
Check Weighing
checkweighing balanceHere is Scientech's answer to a go/no-go weight gauge.  The balance tells if your sample weight is too high, too low, or OK.  Interpretive error is eliminated.  This application is ideal for JIT environments where quality of each sample must be assured.
Percent Weighing
percent weighingBy quickly selecting the % mode, you are able to weigh a sample in percent in order to easily determine percent moisture loss, percent solids, or compounding by percent.
Parts Counting
parts counting scaleYou can even use a Scientech balance for piece counting.  Every model empowers you to count very small to large components quickly and accurately.  The minimum fixed sample number is ten with a user selectable larger sample size feature at your fingertips.
Vibration Filters
high accuracy balanceThis feature authorizes you to select a filter setting which is best suited to your task.  If your surroundings are vibration-free, set the filtering to low which yields results in the fastest possible time.  In more adverse conditions, select either the normal or high filter parameter.  These selections will insure reliable readings during your different weighing applications.
Units of Measure
These multifunctional balances present a choice of eight different standard units of measure: grams (g), carats (ct), ounces (oz), troy ounces (ozt), pennyweight (dwt), milligrams (mg), kilograms (kg), and pounds (lb).  Just push the mode button to select your desired unit of measure.  Also available as an option is a custom weight register which allows any unit of measure you wish.
Live Animal Weighing
animal weighing balanceWeighing using the time averaging mode is ideal for live animal or severe environment weighing.  This feature also includes a reset function which allows you to arrive at the final weight reading in seconds rather than minutes with
density determination kit for balancesScientech does not offer a density determination kit, but we Precision Weighing Balances offers a very low cost aftermarket universal specific gravity kit for $139.95.  You can read more about this product here and how it works.

Scientech claims you don't need a specific gravity kit to determine density by following the steps outline below in the following paragraphs.  We recommend purchasing the aftermarket density determination since it is more accurate.  Density is mass (grams) per unit volume (cubic centimeters).

In order to determine density of a solid, place a graduated flask with a known volume of water on the pan of the balance, zero the balance, and then place the solid in the flask of water.  Divide the displayed weight in grams by the increased volume of water.  The result is the mass per unit volume of the solid in g/cc.

To determine the density of a liquid, place an empty graduated flask on the balance weighing pan, zero the balance, then pour the liquid into the graduated flask.  Divide the displayed weight in grams by the volume of the liquid.  The result is the mass per unit volume of the liquid in g/cc.
optional specific gravity kit

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  Mettler® and METTLER TOLEDO® are registered trademarks of Mettler-Toledo, Inc. 
 Ohaus® is a registered trademark of Ohaus Corporation.


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