The MC-A and MC-M series mass comparators deliver significantly improved precision and stability over the previous generation, enabling reliable comparison of reference weights in calibration labs—whether in-house or service-based. Despite the performance upgrades, the series remain cost-effective, making high-end mass comparison accessible to a broader range of users.

Smart tools for confident mass comparison

Auto-centering pan to ensure consistent accuracy
One of the challenges in high-precision mass comparison is eccentricity error caused by off-center loading, which can compromise repeatability and overall measurement accuracy. The optional auto-centering pan addresses this by automatically bringing the mass to the center of the balance. Its dome-shaped bottom rests on three ball-tipped supports, allowing smooth movement to correct eccentricity errors. If an automatic loading system is not used, A&D strongly recommends this option for manual loading

Stable weighing through control of external disturbances Mass comparators, due to their extremely high sensitivity, are more susceptible to various external disturbances. To help the MC-A and MC-M series fully demonstrate their true capabilities, A&D also recommends the following optional accessories

• Remote controller (AD-8922A) - Operate the balance without direct contact, reducing vibration caused by manual handling.
• Tabletop breeze breaks (AD-1676 or AD-1672(A)*1) - Shield the balance from drafts and minor temperature changes caused by air conditioning or operator movement. Made of antistatic panels to minimize static effects.

Extra decimal place for system integration and fine control The MC-A and MC-M series offer extended resolution not typically available in balances of similar capacity. This extra decimal place enables accurate tracking of small weight changes—even with heavy tare weights common in automated systems for precise dosing, blending, and other demanding processes.
Impact shock detection (ISD) for reliable automation - The ISD function detects impact loads on the weight sensor and displays their intensity in five levels (0–4). High-impact events (Levels 3 and 4) also trigger an audible alert and are logged for review, supporting system adjustments to prevent future errors and sensor damage.

Beyond their primary role as mass comparators
Extra decimal place for system integration and fine control The MC-A and MC-M series offer extended resolution not typically available in balances of similar capacity. This extra decimal place enables accurate tracking of small weight changes—even with heavy tare weights common in automated systems for precise dosing, blending, and other demanding processes.
Impact shock detection (ISD) for reliable automation The ISD function detects impact loads on the weight sensor and displays their intensity in five levels (0–4). High-impact events (Levels 3 and 4) also trigger an audible alert and are logged for review, supporting system adjustments to prevent future errors and sensor damage.

Model	MC-1104A	MC-6203A	MC-10203M	MC-32002M
Price
Capacity x Readability	1100 x 0.0001 g (0.1 mg)	6200 x 0.001g (1 mg)	10.2 kg x 0.001g (1 mg)	32.2 kg x 0.1 g
Repeatability (standard deviation)*i	0.00035 g	0.0035 g (over 2000 g) 0.0015 g (up to 2000 g)		0.05 g (over 20 kg) 0.015 g (up to 20 kg)
Linearity*i	±0.003 g	±0.03 g		±0.2 g
Linearity*i	±0.003 g	±0.03 g		±0.2 g
Sensitivity drift (10 to 30 °C/50 to 86 °F, when automatic self-sensitivity adjustment is OFF)	±2 ppm/°C			±3 ppm/°C
Accuracy immediately after internal sensitivity adjustment*ii)	±0.0100 g	±0.150 g		±1.50 g
Operating environment	5 to 40 °C (41 to 104 °F), 85 %RH or less (no condensation)
Display refresh rate	5 times/sec, 10 times/sec or 20 times/sec
Units of measure*iii	g (gram), kg (kilogram), oz (ounce), lb (pound), lb-oz (pound-ounce), ozt (troy ounce), ct (metric carat), mom (momme), dwt (pennyweight), gr (grain), pcs (counting mode), % (percent mode), and a user-programmable unit
Standard communication interface	RS-232C (D-Sub 9-pin), USB (mini B)
Weighing pan size	128 × 128 mm	165 × 165 mm	270 × 210 mm
External dimensions	259 (W) × 358 (D) × 332 (H) mm (with the large glass breeze break)		300 (W) × 355 (D) × 111 (H) mm
Net weight	Approx. 7 kg		Approx. 9.3 kg
Dust and waterproof rating	N/A		IP65
Power supply / consumption	AC adapter / approx. 30 VA
Standard accessories	Breeze break × 1*iv, Display cover × 1, AC adapter × 1, USB cable (1.8 m) × 1

*i Under good environmental conditions using the auto-centering pan, or with consistent positioning in automated systems.
*ii Under good environmental conditions using the internal weight. The mass of the internal weight may change over time or due to environmental factors.
*iii The kg unit is for the MC-M series only. One additional unit from tael (Singapore/HK jewelry/Taiwan), tola, or Newton can be added upon request.
*iv Large glass breeze break for the MC-A series, and simple, soft plastic breeze break for the MC-M series.

Options

For the MC-A series
• GXA-03*2 2nd RS-232C interface
  
• GXA-04*2 Comparator relay output/buzzer/ external key input interface
• GXA-06*2 Analog (0-1/0.2-1 V) output interface
• FXi-08*2 Ethernet (TCP/IP) interface
• GXA-09*2 *3 Built-in rechargeable battery
• GXA-10*4 Large glass breeze break
• GXA-12 Animal weighing pan
• GXA-17*2 Large glass breeze break with built-in fanless ionizer and external IR switch
• GXA-23-PRINT*2 External key input interface + AX-SW137-PRINT foot switch
• GXA-23-REZERO*2 External key input interface + AX-SW137-REZERO foot switch
  
• GXA-23-PLUG*2 External key input interface + AX-T-314A-S plug
• GXA-24A*2 USB host interface
• GXA-25*2 Fanless ionizer with Quick Ion® technology
• GXA-26* External IR switch
• GXA-27*2 Bluetooth® interface

*2 Only one of GXA-03, GXA-04, GXA-06, FXi-08, GXA-09, GXA-17, GXA-23-PRINT /REZERO/PLUG, GXA-24A, GXA-25, GXA-26, or GXA-27 can be installed
*3 Factory-installed/dealer option
*4 Also provided as standard

For the MC-M series
• GXM-04*5*6 Comparator relay output/buzzer/RS-232C/external key input interface
• GXM-06*5*6 Analog (0-1/0.2-1 V) output/RS-232C interface
• GXM-08*5*6 Ethernet (TCP/IP) interface
• GXK-012 Animal weighing pan
• GXM-27*5 Bluetooth® interface

• *5 Only one of GXM-04, GXM-06, GXM-08, GXM-27, or the standard (RS-232C and USB) interfaces can be installed.
• *6 The MC-M series is not IP65 with GXM-04, GXM-06, or GXM-08.

Accessories

• AD-1603*7 Calibration masses
• AD-1682 Rechargeable battery unit
• AD-1683A*8 Static eliminator
• AD-1684A Electrostatic fieldmeter
• AD-1687 Weighing environment logger
• AD-1688 Weighing data logger
• AD-1689 Tweezers for calibration weight
• AD-8129TH Compact printer
• AD-8526 RS-232C/Ethernet (TCP/IP) converter
• AD-8541-PC Bluetooth® dongle for PC
• AD-8541-SCALE RS-232C/Bluetooth® converter
• AD-8920A Remote display
• AD-8922A Remote controller
• AX-073007197-S Display cover for the MC-M series (5 pcs)
• AX-GXA-31 Display cover for the MC-A series (5 pcs)
• AX-MC10K/30KPAN Auto-centering pan for the MC-M series
• AX-MC1104APAN Auto-centering pan for the MC-1104A
• AX-MC6203APAN Auto-centering pan for the MC-6203A
• AX-USB-9P RS-232C/USB converter with cable

*7 Available in weights from 1 mg to 20 kg, in OIML classes E2, F1, and F2
*8 For in-line use in automated systems, the AD-1683 (without A) is recommended.

more info AND Weighing AD-1689 Calibration weight tweezers, pack of 5 more info Price: $197.40 In Stock With a length of 210 mm, the tweezers allow a weight to be placed in a weighing pan without having to put a hand inside the chamber. This prevents convection flow that is normally attributed to heat coming from the hand. Each tweezer is made from austenitic stainless steel (SUS304), therefore heat from the hand is unlikely to be transmitted to the weight via the tweezers. This is especially effective for the precise measurements required of analytical balances. Tips of the tweezers are covered in resin to prevent the weight from slipping. The hilt is also covered with resin for easy gripping. more info AND Weighing AD-8541-SCALE RS-232C to Bluetooth® Converter more info Price: $144.50 In Stock AND Weighing AD-8541-SCALE RS-232C to Bluetooth® Converter more info AND Weighing AD-8541-SCALE RS-232C to Bluetooth® Converter more info Price: $144.50 In Stock AND Weighing AD-8541-SCALE RS-232C to Bluetooth® Converter more info AND Weighing AD-1684A Electrostatic Field Meter more info Price: $1,492.50 In Stock The AD-1684A is an electrostatic fieldmeter designed for detecting the existence of static electricity, which is often the cause of inaccurate weighing. The AD-1684A can be used for measuring the electrostatic charge of measured objects or on automated factory lines, and for confirming the effect of a static eliminator (e.g. the AD-1683). Compact and light body Large, easy-to-read LCD Amount of the electrostatic charge also displayed as a bar graph Hold function Possible to measure the ion balance of a static elimination device more info AND Weighing AD-1684A Electrostatic Field Meter more info Price: $1,492.50 In Stock The AD-1684A is an electrostatic fieldmeter designed for detecting the existence of static electricity, which is often the cause of inaccurate weighing. The AD-1684A can be used for measuring the electrostatic charge of measured objects or on automated factory lines, and for confirming the effect of a static eliminator (e.g. the AD-1683). Compact and light body Large, easy-to-read LCD Amount of the electrostatic charge also displayed as a bar graph Hold function Possible to measure the ion balance of a static elimination device more info AND Weighing AD-8526-9:Ethernet Adapter D-Sub 9 with WinCT Plus more info Price: $522.60 In Stock AND Weighing AD-8526-9:Ethernet Adapter D-Sub 9 with WinCT Plus more info AND Weighing AD-8526-9:Ethernet Adapter D-Sub 9 with WinCT Plus more info Price: $522.60 In Stock AND Weighing AD-8526-9:Ethernet Adapter D-Sub 9 with WinCT Plus more info AND Weighing AD-8541-PC Bluetooth Wireless Communication Interface for PC more info Price: $132.80 In Stock The AD-8541-PC enables a PC (with communication software such as WinCT installed) to wirelessly receive data from and send commands to the SJ-WP-BT series through its USB port.*7 The commands available with the SJ-WP-BT series include read/set comparator limit values as well as request data, zero, tare, clear tare, and switch the weighing unit so that you can avoid troublesome key operation with the scale when confirming and/or changing the comparator limit values. *7 The driver software for the AD-8541-PC is automatically installed with Windows 8.1 or later. If the driver cannot be installed, download it from the [Support] - [Software] section of the A&D website (www.aandd.jp), where WinCT is also downloadable for free more info AND Weighing AD-8541-PC Bluetooth Wireless Communication Interface for PC more info Price: $132.80 In Stock The AD-8541-PC enables a PC (with communication software such as WinCT installed) to wirelessly receive data from and send commands to the SJ-WP-BT series through its USB port.*7 The commands available with the SJ-WP-BT series include read/set comparator limit values as well as request data, zero, tare, clear tare, and switch the weighing unit so that you can avoid troublesome key operation with the scale when confirming and/or changing the comparator limit values. *7 The driver software for the AD-8541-PC is automatically installed with Windows 8.1 or later. If the driver cannot be installed, download it from the [Support] - [Software] section of the A&D website (www.aandd.jp), where WinCT is also downloadable for free more info AND Weighing AD-1689 Calibration weight tweezers, pack of 5 more info Price: $197.40 In Stock With a length of 210 mm, the tweezers allow a weight to be placed in a weighing pan without having to put a hand inside the chamber. This prevents convection flow that is normally attributed to heat coming from the hand. Each tweezer is made from austenitic stainless steel (SUS304), therefore heat from the hand is unlikely to be transmitted to the weight via the tweezers. This is especially effective for the precise measurements required of analytical balances. Tips of the tweezers are covered in resin to prevent the weight from slipping. The hilt is also covered with resin for easy gripping. more info AND AD-1682 Rechargeable Battery Pack more info Price: $709.30 In Stock Rechargeable Battery Pack for AND Weighing balances more info AND Weighing- AD-1688 -Weighing Data Logger more info Price: $327.60 In Stock AD-1688 Specifications Application devices Balances and scales manufactured by A&D with an RS-232C connector Memory size Approx. 5,000 data sets in the standard format (15 characters in 1 data set) can be stored Clock error ±1 minute / month Applicable OS Windows 2000 / XP / Vista Dedicated power supply Not required. Power is supplied by the weighing instrument or PC. Operating environment 50°F - 86°F (5°C - 40°C ), 85%RH or less (no condensation) Dimensions Approx. 2.1 oz (60 g) Weight Approx. 2.1 oz (60 g) more info AND Weighing- AD-1688 -Weighing Data Logger more info Price: $327.60 In Stock AD-1688 Specifications Application devices Balances and scales manufactured by A&D with an RS-232C connector Memory size Approx. 5,000 data sets in the standard format (15 characters in 1 data set) can be stored Clock error ±1 minute / month Applicable OS Windows 2000 / XP / Vista Dedicated power supply Not required. Power is supplied by the weighing instrument or PC. Operating environment 50°F - 86°F (5°C - 40°C ), 85%RH or less (no condensation) Dimensions Approx. 2.1 oz (60 g) Weight Approx. 2.1 oz (60 g) more info AND Weighing -AD-1687 - Weighing Environment Logger more info Price: $951.75 In Stock Data capacity Maximum 10,000 sets (including date and time) Interval time 1, 2, 5, 10, 15, 20, 30 seconds, 1, 2, 5, 10, 15, 20, 30, 60 minutes Power supply Two LR6 (AA) batteries, RS-232C, or USB Battery life Approx. 6 months (with measurement interval at 1 minute, alkaline batteries) Clock accuracy Maximum ±1 minute/month Compatible operating systems Windows 2000 / XP / Vista / 7 (32 / 64 bit) Operating environment 0 to 60 °C / 32 to 140 °F, 85% RH or less (no condensation) Dimensions 127 (W) × 90 (H) × 36 (D) mm (including the protective cover) Weight Approx. 275 g (including batteries and the protective cover) Standard accessories Three RS-232C cables for weighing instruments (9-pin D-Sub, 25-pin D-Sub, and 7-pin DIN, 1 m), USB cable (1 m), Two LR6 (AA) batteries (for operation check), Protective cover, Instruction manual Sensor Resolution Measurement range Accuracy Temperature 0.1 °C ,0.1 °F 0.1 °F 0 to 60 °C ,32 to 140 °F 32 to 140 °F ±0.5 °C (20 to 30 °C),±0.9 °F (68 to 86 °F) Relative humidity 0.1% RH 0 to 100% <±3% (20 to 80%)/td> Barometric pressure 0.1 hPa 500 to 1100 hPa hPa ±3 hPa (0 to 60 °C) Vibration 1 mG 0 to 2000 mG ±20%, static acceleration more info AND Weighing -AD-1687 - Weighing Environment Logger more info Price: $951.75 In Stock Data capacity Maximum 10,000 sets (including date and time) Interval time 1, 2, 5, 10, 15, 20, 30 seconds, 1, 2, 5, 10, 15, 20, 30, 60 minutes Power supply Two LR6 (AA) batteries, RS-232C, or USB Battery life Approx. 6 months (with measurement interval at 1 minute, alkaline batteries) Clock accuracy Maximum ±1 minute/month Compatible operating systems Windows 2000 / XP / Vista / 7 (32 / 64 bit) Operating environment 0 to 60 °C / 32 to 140 °F, 85% RH or less (no condensation) Dimensions 127 (W) × 90 (H) × 36 (D) mm (including the protective cover) Weight Approx. 275 g (including batteries and the protective cover) Standard accessories Three RS-232C cables for weighing instruments (9-pin D-Sub, 25-pin D-Sub, and 7-pin DIN, 1 m), USB cable (1 m), Two LR6 (AA) batteries (for operation check), Protective cover, Instruction manual Sensor Resolution Measurement range Accuracy Temperature 0.1 °C ,0.1 °F 0.1 °F 0 to 60 °C ,32 to 140 °F 32 to 140 °F ±0.5 °C (20 to 30 °C),±0.9 °F (68 to 86 °F) Relative humidity 0.1% RH 0 to 100% <±3% (20 to 80%)/td> Barometric pressure 0.1 hPa 500 to 1100 hPa hPa ±3 hPa (0 to 60 °C) Vibration 1 mG 0 to 2000 mG ±20%, static acceleration more info AND AD-8922A Remote Controller more info Price: $578.65 In Stock Remote Controller for AND Weighing balances Displays weighing data Remotely controls a weighing instrument with key operations (no access to the internal settings) Outputs weighing data to another external device such as a PC or printer via the RS-232C connection Optional BCD, comparator, and analog outputs available Can be panel-mounted more info AND AD-8922A Remote Controller more info Price: $578.65 In Stock Remote Controller for AND Weighing balances Displays weighing data Remotely controls a weighing instrument with key operations (no access to the internal settings) Outputs weighing data to another external device such as a PC or printer via the RS-232C connection Optional BCD, comparator, and analog outputs available Can be panel-mounted more info AND AD-8920A Universal Remote Display more info Price: $255.00 In Stock Universal Remote Display for AND Weighing balances Connects to A&D’s balances and scales using either RS-232C or current loop Includes an AC adapter and a communication cable that matches your instrument Recognizes the balance/scale baud setting automatically Large and bright VFD display more info AND AD-8920A Universal Remote Display more info Price: $255.00 In Stock Universal Remote Display for AND Weighing balances Connects to A&D’s balances and scales using either RS-232C or current loop Includes an AC adapter and a communication cable that matches your instrument Recognizes the balance/scale baud setting automatically Large and bright VFD display more info AND AD-1682 Rechargeable Battery Pack more info Price: $709.30 In Stock Rechargeable Battery Pack for AND Weighing balances