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GP Series - Precision Industrial Balances

PAGES ON THE GP-SERIES:  1  2  3  4  5
Download the Instruction Manual (5.34MB)
Click to view the
specific topic
Specs on GP-12K/GP-20K/GP-32K/GP-30K/GP-30KS
Specs on GP-40K/GP60K/GP-100K/GP-100KS/GP-102K
VFD Display
Swing Arm display
Remote display for GP-30KS or GP-100KS
SHS General Intro
How does SHS work?
What does IP54 mean?
Low maintenance cost
GP-12/20/22/30/40/60/100/102K packing list
GP-30KS & GP-100KS packing list
GP-12/20/22/30/40/60/100/102K dimensions
GP-30KS & GP-100KS dimensions
Instruction Manual (pdf file 5.34MB)

New GP Industrial Balance with Super Hybrid Sensor (SHS) technology providing unsurpassed performance, speed and durability.  Improvements versus the HP predecessor with super fast response and robust durability using A&D’s patented SHS Technology, IP-65 rating, convenient automatic self-calibration with internal calibration mass and detached display (only GP-30KS,GP-32KS, GP-60KS, GP-61KS & GP-100KS only).

For users on a budget that require high resolution over a limited range, A&D introduces SmartRange on the GP-32K & GP-102K models.  SmartRange allows the operator to select a movable fine range throughout the entire weighing range of the balance.

The GP features a rugged die cast aluminum alloy/stainless steel construction, making it the strongest and longest lived industrial balance in its class.  A&D dominates the high capacity, high precision market especially in the asphalt and aggregate marketplace because they're built to survive.  From California to Florida we have been supplying the ever popular HP-20K to state Department of Transportation Offices throughout America and now we can offer the GP-Series to meet many of your AASHTO testing applications. 

60 month warrantyThe GP Series offers the ability to set the function parameters to inhibit the automatic calibration feature.  In the automatic calibration mode, calibration may be initiated when ambient temperatures change.  This may hamper your measurement process when warm aggregate is being weighed.  Other balances on the market sometimes perform auto calibration if the aggregate is warm enough to trigger the internal sensors, just when you want to use the balance.

A&D GP Series offers the fastest weighing technology and didn't stop here.  Now all GP-Series come standard with internal calibration and the RS-232 interface.  The internal calibration makes calibrating your GP Balance easy when you relocate or bump your balance.  Just push a button!  The GP will even perform Automatic Self-Calibration, calibrating the balance when it detects changes in the ambient temperature.

The GP is Rugged
The GP series is constructed of a die-cast aluminum body and stainless steel weighing pan, assuring safe operation in demanding applications.  Low maintenance costs and longer product life make the GP Series the premiere high capacity toploading balance on the market today.


IP-65/NEMA4 Compliant
The GP Balance is protected from dust and spills up to IP-65/NEMA4 levels.

GLP/GMP/ISO Compliant
Allows GLP or LIMS balance management by outputting the Balance ID number and data used to calibrate the balance.  The data can be output to A&D's AD-8121 printer or a PC, indicating date, time, Balance ID number, serial number and calibration data.


ID Number
The balance ID number can be set.  It is used to identify the balance when GLP is used.  The ID number is memorized and maintained once it is fixed, even if the AC adapter is removed.

Density determination
GP is equipped with a density determination mode, which is accessible after changing the internal parameter settings.  Once the object's weight in the air, in the liquid and the liquid density are input, the solid density will be calculated.

HI, OK, LO Indicator
When the MODE key is pressed, the display is refreshed and the indicator changes from HI to HI.  The letters (HI, for example), can be enlarged.  This feature allows the user to set the HI and LO parameters and quickly determine if subsequent weighments are within the set tolerances.

Accumulation of weighing results
GP offers a built in accumulator and transaction counter.  Simply place the item to be weighed on the platform and push the print button, each weighment will be added and the accumulated value displayed.  Pushing the mode button will show the number of accumulated weights stored in the transaction counter.

Internal Calibration
GP balances have a motorized built in calibration weight.  The internal calibration weight is equivalent to a 50kg calibration mass.  Of course, the GP can be calibrated with optional external weights where calibration tractability may be required.


Display Auto Power ON & OFF
The display can be set to turn off automatically after 10 minutes of inactivity, which can be disabled if not desired.  Without pressing ON/OFF key, plug it in and the balance will turn itself ON, once the internal setting is set.

Data Memory
Standard Time & Date Function complies with GLP and Interval Weighing in the Data Memory function.  The data memory can be formatted for:

Only the GP30KLS & GP100KLS have
the remote indicator.  All other models
have indicator attached to swing arm

Time & Date
Standard Time & Date Function complies with GLP and Interval Weighing in the Data Memory function.

Auto Self Checking
Automatically checks itself when setting the Automatic Adjustment Environment.

Optional Underhook
Ideal for density determination and weighing magnetic substances

Interval Time Setting
Weighing intervals of 2, 5, 10, 30 seconds and 1, 2, 5, 10 minutes using the Data Memory Function.

Auto Re-Zero
Re-Zeros automatically after data output

Large Stainless Steel Weighing Pan
384mm x 344mm for GP12K/20K/22K/30K/30KS/40K/60K
386mm x 346mm for GP100K/100KS/102K

Multiple Weighing Units & Programmable Unit
Standard (selectable) units of measure include (g, kg, lb, lb/oz, oz, troy oz, carat, pennyweight, momme, tola, tael, percentage, density mode, and a user definable unit of measure).  In addition, the GP has an Animal Weighing program that freezes the display after a predetermined time allotment.

For more accurate weighing, SmartRange function is provided for the GP22K (6.1kg x 0.1g/21kg x 1g) and GP-102K (61kg x 1g/101kg x 10g).  The precision range has a higher resolution and the standard one is normal resolution.  Pressing the RE-ZERO key allows weighing in the precision range, regardless to the tare value.  SmartRange function enables you to weigh or add samples in the precision range without removing the container and/or those objects that have been placed on the pan.

CLICK HERE FOR HIGH-RESOLUTION IMAGE!Optional AD-1682 Rechargeable Battery Unit
Now you don't have to worry about finding a power line for those remote office trailer labs when performing weighing applications for highway or construction sites.  The AD-1682 can power the GP-Series for typically up to 7 hours of operations when the Ni-MH batteries are fully charged.

WinCTAll A&D's balances equipped with an RS-232c and can use the A&D WinCT balance communication software to interface your computer with your A&D balance.

Download the Instruction Manual (5.34MB) now download manual  You need Adobe Acrobat Reader to view.  The instruction manual contains detail information regarding the counting mode, accumulation function, data memory, density measurement, RS-232C command list & more.
CLICK HERE FOR HIGH-RESOLUTION IMAGE! The GP Series incorporates A&D's enhanced weighing sensor, Double Leveraged Super Hybrid Sensor (SHS).
Building on the basic SHS features of speed and stabilization, the enhanced SHS technology brings the most accurate weighing results to industrial balances in 12kg to 101kg capacities.
Click Here For More on the weighing sensor ...

Please pay special attention to the configuration of the indicator head.  Only the GP-30KS,GP-32KS, GP60KS, GP61KS and GP-100KS offer the remote indicator.  All other GP-Series have the indicator mounted on a swing are.  Click the image of the scales to the right for a close-up view & more details. indicator on swing arm indicator on swing arm indicator on swing arm indicator on swing arm remote indicator

Weighing capacity

12 kg

21 kg

31 kg / 6.1 kg

31 kg

31 kg


0.1 g

1g / 0.1g

0.1 g

Repeatability (Std. Deviation)

0.1 g

0.5g / 0.1g

0.1 g


0.2 g

1g / 0.2g

0.2 g

Stabilization Time

1.5 seconds (TYP at FAST mode)

Sensitivity Drift (10 C-30 C/50 F-86 F)

3ppm / C

5ppm / C

3ppm / C

Operating Temperature

5 C to 40 C (41 F to 104 F), 85% RH or less

Sensing Method

Super Hybrid Sensor (SHS)

Display Type

Vacuum Fluorescent Display (VFD)

Display Refresh rates

5 times/second or 10 times/second

Weighing units and modes

g, kg, lb, lb:oz, ct, dwt, ozt, mm, TL, Ms, t, DS and percent % and counting PCS

Counting Mode

Minimum unit mass

0.1 g

1 g

0.1 g
Number of samples

10, 25, 50 or 100 pieces

Percent Mode

Mini. 100% reference mass

10 g

100 g

10 g
Min. 100% display

0.01%, 0.1%, 1% (can be automatically switched depending on the reference mass stored)

Standard interface

RS-232C Serial interface with Windows Communication Tools (WinCT)

Recommended External
Calibrating Weight

5 kg

10 kg

10 kg

20 kg

20 kg

10 kg

20 kg

20 kg

30 kg

30 kg

Water & Dust proof level

Compliance with IP-65 covers the entire device

Weighing Pan

Stainless steel weighing pan 384mm x 344mm / 15.1 inches x 13.5 inches (Wash down type)


Motor-driven internal calibration with SHS (internal mass approx. 300g)

External Dimensions

372(W) x 615(D) x 130(H) mm [Note: GP-30KS is 344(W) x 422(D) x 130(H) mm]

AC adapter

100, 120, 220, 240 VAC (AC adapter) 50/60 Hz All balances shipped with 120V AC Adapter.
Other voltages at additional cost.

Power Consumption

Approx. 11VA (supplied by AC adapter)


5 years manufacturer's warranty

Net Weight

Approx.17 kg

Features - click each icons for more information
Click any of the icons above and a pop-up window will provide an explanation of the particular feature

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