Barcode Discount
Monday-Friday 7am-7pm Central
Same Day Shipping
Help Cart

Unitech MS331 Barcode Scanners

Unitech MS335 A newer version of this item is available.
It is replaced by the Unitech MS335.

Robust design withstands 5 ft. (1.5 meter) drop to concrete

The Unitech MS331 is a durable, user-friendly barcode scanner. The MS331 features high performance at a cost-effective price, giving users in health care, office, light industry and other areas an excellent productivity enhancement tool. The MS331 features a long-range CCD scanner with an extended depth of field, plus a scan width of up to 18cm. The high reliability and first-pass scanning success rate of the Unitech MS331 makes data collection tasks faster and more efficient. An audio beeper and visible good-scan LED show users their scans have been read properly. The MS331 also features a variety of connection options, including USB, RS232 / serial and PS/2 keyboard wedge.
MS331 Options
Unitech MS331 (MS331-1G)
MS331, CCD Scanner (Long Range Scanner and No Cable) - Color: Dark
Recommended Accessories
Unitech (101000-0150)
AC Adapter (110 VAC to 5VDC) for the RS-232 CCD Scanner
In Stock: Ships Today
+ Add to Quote
Unitech (1010-602141G)
Power supply - 100-240V - 9V DC - Compatible with Unitech HT630 and MS860
In Stock: Ships Today
+ Add to Quote
Unitech (1550-601728)
Straight Cable (Black, USB) for the MS860
Ships in 3-5 Days
+ Add to Quote
Unitech (1550-201596)
HHLC and Wand Emulation Interface Cable (Black) for the MS210, MS265, MS300, MS331, MS690 and MS830
Ships in 3-5 Days
+ Add to Quote
Unitech (1550-201531G)
RS-232 Cable, 54", DB-9F, Coiled, Black - (Power Adapter Sold Separately)
Ships in 3-5 Days
+ Add to Quote

Unitech MS331 Details


Light source 660 nm red LED
Sensor 3000 element linear array
Scan rate 50 scans/second
Scanning area 7.08" (180mm) maximum
Print contrast ratio 45% minimum absolute dark/light reflectance @ 660 nm


Connector TTL (DB9 Squeeze & Release)
Keyboard Wedge (PS/2 or AT)
RS232 (DB9)
USB (Type A)
Operation modes Trigger, flash, or continuous


Dimensions Length (horizontal): 3.9 Inches (100mm)
Height (vertical): 7.1 Inches (180mm)
Width: 2.75 Inches (70mm)
Weight 5.8 ounces (164g)


Operating voltage 5V ±5%
Operating current Standby: ≤80 mA (switch mode)
Operating: 175 mA (keyboard wedge)
Cable Interchangeable with TTL, PS/2, AT, RS232, or USB cables


Symbologies China Postal Code
Code 11
Code 32
Code 39 (full ASCII)
Code 39 (Standard)
Code 93
Code 128
Delta Code
EAN-8 with add-on code
EAN-13 with add-on code
EAN 128
Interleaved 2 of 5
ISBN / Bookland EAN
ISBT 128
Italian Pharmacy
Label Code IV
Label Code V
MSI / Plessey
Standard 2 of 5
Toshiba Code
UPC-A with add-on code
UPC-E with add-on code
Data editing Preamble, postamble, Code id, and data reformatting
Key emulation PC, Macintosh, and IBM terminal keyboard
Configuration Scanner Configuration Manager software
Scanned-in barcodes


Operating temperature 32ºF to 122ºF (0ºC to 50ºC)
Storage temperature -4ºF to 140ºF (-20ºC to 60ºC)
Humidity 20% to 85% RH non-condensing
Mechanical shock 5 feet (1.5 meters) drop onto concrete
ESD protection Contact: 8K
Air: 12K
Regulatory approvals CE
Warranty 5 years

All products Barcode Discount sells are new (not used). Most products ship via our low cost flat rate shipping the same day your order is placed and can ship overnight to anywhere in the US. Our prices are amongst the best available anywhere. Buy online or call 1-800-485-3730 for a free review of your product needs by one of our knowledgeable product experts.