Radwag XA 53.4Y.M PLUS Microbalance


Maximum capacity [Max]: 53g

Readability [d]: 1µg

The XA 4Y.M PLUS microbalances provide the best minimum weight in the market and are intended for the most complex weighing of small masses. The devices are highly resistant to ambient conditions and their ergonomic design ensures convenient operation.

Innovative 2-Point Adjustment System
The 2-point adjustment system guarantees the most accurate measurement and minimized linearity errors, this ensures reliable measurement results for the whole range.

Smart Min Weight
Unique design solutions of the XA 4Y.M PLUS microbalances guarantee the best value of minimum weight among professional-class solutions available on the market.

Faster Measurement with the New CPU
The 4Y balances are equipped with Dual Core 2× 1 GHz processor and offer new possibilities of fast operation assuring short indication stabilization time at a respective repeatability.

16 GB Memory – New Possibilities of Data Management
Upgraded 16 GB memory enables record of measurement data in a form of reports, time and statistical graphs.

Second to None Repeatability and Compliance with USP
The highest measurement accuracy, repeatability of sd ≤ 0.08 mg and compliance with USP (Chapter 41 and 1251) make the 4Y series balance a new benchmark of mass measurement quality.

Ergonomics and Safety of Operation
Spacious weighing chamber and large open-door clearance allow easy access to the weighing pan and facilitate use of laboratory glassware of various sizes and dimensions. Special design of the weighing chamber glass pane guides (no edges) facilitates control of cleanliness during everyday operation. Panes disassembly does not require use of any tools, which makes keeping the device clean easy.

LevelSENSING System
The in-built sensors measure tilt and display graphic message on the weighing device screen. Levelling system facilitates adjustment, controls the level state, and informs about level deviations, all this in accordance with GLP and GMP.

21 CFR Part 11 Compliance Module
All XA 4Y.M PLUS microbalances are complaint with 21 CFR part 11 regulations and with provisions of EU GMP part 4, annex 11. They are equipped with a number of security and monitoring functions that control work of particular operators and an electronic signature.

Full data protection:

  • advanced password settings
  • verification of log in correctness
  • assigning operators with individual permissions
  • auto logout
  • electronic signature, e.g. for series of measurements
  • granting/denying access to data management
  • backup
  • modifications saved to Audit Trail file

Mobile Control
Wi-Fi® offers possibility to send data from 4Y balance to a mobile iOS or Android device, via special data management apps. Wireless communication between the indicator and the weighing instrument enables operating the XA 4Y.M PLUS balance that is placed inside a laminar flow hood or a fume cupboard.

Data Safety
All 4Y series balances feature internal ALIBI memory guaranteeing safety and automatic record of measurements, it also offers possibility to preview, copy and archive data. ALIBI memory enables saving unlimited quantity of records within administrator-determined time.

Defined Profiles
Four predefined profiles enable automatic customization of balance parameters.

  • FAST – the measurement result is obtained in a very short time
  • FAST DOSING – the balance quickly reacts to mass changes, especially useful for dosing or adding more product to the dispensed portion
  • PRECISION – balance settings providing the minimum standard deviation,
  • USER – customization of the parameters in accordance with operator’s requirements.

Ambient Condition Monitoring
The 4Y series balances feature a unique solution for control of ambient conditions at the balance workstation, i.e. special measuring sensor integrated into the balance. The system monitors temperature, humidity, pressure and air density. Upon exceeding standards determined by the administrator, a respective message is displayed on the balance home screen.
It is possible to connect additional THB sensors to the balance.


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  • ALARM function
  • graphic level indicator
  • programmable acceptable tilts


  • update balance software
  • export weighing data
  • export/import databases
  • export/import balance settings
  • exchange data between balances


Optional functions:

  • PRINT function
  • TARE function
  • sensor’s sensitivity adjustment



Elimination of extra sources of vibration
Using wireless terminal facilitates elimination of additional vibrations resulting from daily operation on a balance. Owing to that, balances with highest resolutions might be used without the need of dedicated weighing workstations.
Convenience and comfort of weighing in fume cupboards and laminar flow cabins
Wireless communication between a terminal and a weighing module makes balance operation more comfortable and safer.

Balance isolation form influence of environmental conditions
Wireless communication allows to either place the weighing module inside a draft shield or to isolate it from the operator. This allows to weight toxic substances without putting operator’s health or life at risk.


  • Ethernet
  • 2×USB
  • 2×RS 232
  • 4 in / 4 out
  • WiFi 2,4GHz b,g,n


  • fully removable components of the weighing chamber
  • uncomplicated and fast disassembly requiring use of no tools
  • latch-type system for components assembly
  • easy maintenance and cleaning


It minimizes linearity errors simultaneously providing reliable indications for the whole weighing range.


The ionizer neutralizes any uncompensated electric charge accumulated on the weighed object. The influence of static electricity gives greater repeatability error, often also greater error of indication.


PLUS balances automatically adjusts resolution of the range to the currently weighed mass.


Full data protection is ensured by:

  • advanced password settings,
  • verification of log-in operation correctness,
  • assigning permissions to operators,
  • auto log out,
  • electronic signature, e.g. for series of measurements,
  • granting/denying access to data management
  • data backup,
  • modifications saved to Audit Trail file.



Diagnostic function aiming at metrological parameters determination (repeatability), the parameters are determined for the actual conditions of use. When speaking of repeatability it may be also used for weighing time optimization. Autotest is operated in an automatic mode thus operator’s time is saved.


Weighing process for which reference mass has been determined together with tolerance for its determination. Dosing tolerance is given in [%] and it is calculated in relation to the reference value thus being a permissible deviation of this process. This solution is used for weighing powders, liquids and loose materials. Dosing function performance is often supported with bargraph – load indicator. For industrial scales it is possible to use a control systems of dosing process.


Percent Weighing function is used for comparision of measured products with mass standard. Mass of a mass standard may be a numeric value taken from a database or it may be determined through a measurement process. Each measured product is compared to mass standard, mass of which is presumed as a model 100% ideal mass. For products weighing less than the mass standard, obtained results are lower than 100%, for products weighing more, the obtained results are greatly  exceeded.


Function using mass measurement for determination of  measured items quantity. Mass of a single item is required for this process. It may be either estimated through weighment or taken from a database. For items counting the following algorithm is used: all items mass / single item mass = quantity. Function operation is supperted by a mechanism of Automatic Correction of Accuracy. This allows to update single item mass in course of the process. To a certain extend Automatic Correction of Accuracy eliminates error which may be a result of different mass values of seemingly alike single elements. For industry solutions items counting may be simultaneously carried out with checkweighing and dosing thus industry solutions feature audio signalling base informing that specified number of items has been weighed. It is possible to apply weighing systems using few platfroms of different MAX capacities and different accuracies.


Function supporting the mixture making process, wherein the mixture contains various components. Formulation function usually uses the balance/scale database of components. Formulation serves for monitored checkweighing of every single component with a given tolerance. It is enriched with a set of individual settings.


Statistiscs function registers and analyses performed measurements. This supplies the user withthe following information: Max and Min standard deviation, average value, variance, range et.


Checkweighing function is used for checking whether the measured sample mass is within the predefined threshold values, Low [LO] and Hgh [HI]. The thresholds are given in [g] and [kg] units. Current state of a sample being measured is signalled by means of pictorgams located on a display for laboratory balances, for industrial scales Stackligt System is used. This visual +/- inspection is in operation during segregation, control or packing process of products for which mass has bees determined with a specifaied tolerance, eg. 12860 g 961


Programmable function supporting the weighing process through control of the following options: sliding weighing chamber doors, printout, zeroing, tarring etc. Especially appreciated wherever preventing the balance from soiling is important.


Diagnostic function allowing to objectively document performed measurements. GLP procedures may be either presented in a short report form or extended one.


Process of mass determination for a product which may unwillingly reposition within the weighing pan. Mass determination in such cases requires much longer period of time when compared to typical weighing process. It is the user who defines period of time needed for control of measured product mass. The user can thus optimize the function depending on the measured product characteristics.


Function performing correction of mass measurement indication, wherein the air density is taken into account. It is used in balances with reading unit < 0,01 mg.


Differential weighing informs about mass variation a particular sample, wherein the said variation is a result of manufacturing processes.

Differential weighing is often applied in product control process, for which reference product parameters have been specified in order to be used as a source of comparison for the whole series.
Insuchcasestandard deviation is the information which tells about quality and completeness of a final product. For systems based on a feed-back technique such information may be used by control units.


Replaceable units.


Statistical control for determination of basic statistical criteria: maximum, minimum, standard deviation, mean values for each batch, etc.


“ALIBI” memory enables saving and storing up to 100000 measurements.  Measurements are saved automatically upon each pressing of the key. There is no need for any additional operations or changing settings.
The following data related with the measurements is saved: measurement date; measurement time; result (mass); tare value; operator carrying out the measurement (logged in); product name.
The software saves the measurement in a so called loop, i.e. when the measurement no. 100001 is saved, the measurement 1 gets automatically deleted from the memory.
Measurements saved to balance memory cannot be deleted.
You can preview and print out the data saved to the ALIBI database.


Wi-Fi® offers possibility to send data from balance to a mobile iOS or Android device, via special data management apps. Wireless communication between the indicator and the weighing instrument enables operating the balance that is placed inside a laminar flow hood or a fume cupboard.


Maximum capacity [Max]53 g
Minimum load0.5 mg
Readability [d]1 µg
Tare range-53 g
Standard repeatability [5% Max]1.5 µg
Standard repeatability [Max]6 µg
Standard minimum weight (USP)3 mg
Standard minimum weight (U=1%, k=2)0.3 mg
Permissible repeatability [5% Max]2.4 µg
Permissible repeatability [Max]8 µg
Linearity±20 µg
Eccentric load deviation20 µg
Stabilization time~ 3.5 s
Adjustmentinternal (automatic)
Display5.7” resistive colour touchscreen
Communication interface2×RS232, 2×USB-A, Ethernet, 4 IN / 4 OUT (digital), Wi-Fi®
Power supply100 ÷ 240 V AC 50 / 60 Hz
Power consumption max.10 W
Operating temperature+10 ÷ +40°C
Relative humidity40% ÷ 80%
Weighing chamber dimensions168×163×228 mm
Weighing pan dimensionsø30 mm
Packaging dimensions720×385×485 mm
Net weight9.8 kg
Gross weight14.3 kg


    • Pippetes PC Software
    • Granite Antivibration tables
    • Antivibration tables for laboratory balances
    • Professional weighing table
    • Audit trail reader
    • E2R System
    • Label Editor R02
    • Parameter Editor
    • R.Barcode
    • R-LAB
    • RAD-KEY
    • RADWAG Connect
    • RADWAG Development Studio
    • RADWAG Remote Desktop
    • labVIEW Driver
    • Receipt Printer
    • Label Printers
    • Antistatic Ionizer
    • THBR 2.0 System-Ambient Conditions Monitoring
    • RS 232, RS 485 Cables
    • Moxa Uport 1110 Converter
    • RS 232 cables (scale-EPSON Printer)
    • Protective Cover for Balances
    • Barcode Scanners
    • Anti-Draft Chamber for XA 4Y Balances
    • Displays
    • Power Adapters


21 CFR Part 11 Compliance Module:

The 21 CFR Part 11 Compliance Module is a solution especially useful for those users who are obliged to conform to provisions of 21 CFR Part 11 and EU GMP Part 4, Annex 11 regulations. These two documents determine the rules for using electronic records and signatures.

Data protection is guaranteed by:

  • advanced password settings,
  • control of logging correctness, various permission levels,
  • data management access,
  • backup,
  • electronic signature,
  • time-defined automatic logout,
  • modification record to Audit Trail file.

The module features “Audit Trail” which registers each data modification (date, start value, modified value, operator responsible for the modification). This enables tracking all activities and modifying them in the future if required.
The Audit Trail Reader freeware allows users to acquire data from the weighing instrument and export it as files to pdf, xls, csv, html formats.

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