USB Load Cell

 This page shows you how you can connect a load cell to a PC/Laptop/Tablet* and how you can use the data…

 A simple USB load cell system, using a Low Cost 10″ tablet* as a large display.


You can add a USB connection to any of our load cells by selecting the USB module from the “Output” list box on the load cell product page. The miniature In-Line USB module (58mm x 33mm x 13mm) then becomes an integral part of the load cell cable (there’s also a separate USB Load Cell Adapter for retrofitting to existing load cells). The cable is then plugged directly into a spare USB** port on your device, giving you a simple working system. You can connect as many USB load cells to your device as you have spare USB** ports. If you need to connect more load cells than you have ports, you can add more ports by using a USB Hub.

Miniature In Line USB module

USB Hub for Multiple Load Cells


Once you’ve connected your load cell and PC/Laptop/Tablet*, the free software will display live readings that can also be logged to a CSV file (max 24 load cells). The logged data can then be loaded into a spreadsheet, like Excel, to produce graphical reports etc. If you want to try the free software now, you can download and install the single-channel version, as it has a “Demo” mode. The demo mode lets you see all the available settings without having to have a load cell connected. Also, if your device is connected to your network you can access any logged data from other PC’s on the network.

More advanced users/programmers can take advantage of the DLL driver and create their own windows applications (Driver file comes with example source code for Visual Net and C programs). The modules can also be set up to produce a constant stream of ASCII values which is handy for interfacing with other terminal type programs/equipment.

PC-USB module

Setup and Single Channel Logging

(Click here to download software)

(it’s free!)

PC-USB module

Multichannel Logging Software

(Click here to download software)

(this is free too!)

Example CSV file in Excel showing logged Data (Time stamp, milliseconds and load cell output)

PC USB Module Specification

Parameter Min Typical Max Units/Notes
Average Operational Current (normal mode) 70 80 mA@350 Ohm
Operating Temperature Range -40 85 Deg C
Storage Temperature Range -40 85 Deg C
Humidity 0 95 %RH

Bridge Measurement

Measurement Min Typical Max Units
Offset Temperature Stability 1 4 ppm/C
Gain Temperature Stability 3 5 ppm/C
Offset Stability with Time 35 160 ppm of FR
Gain Stability with Time 300 ppm of FR
Non Linearity before Linearization 5 25 ppm of FR
Internal Resolution 16 Million Counts/Divs
Resolution @ 1Hz Readings (Noise Stable) over 100s 200,000 Counts/Divs
Resolution @ 10Hz Readings (Noise Stable) over 100s 120,000 Counts/Divs
Resolution @ 100Hz Readings (Noise Stable) over 100s 50,000 Counts/Divs
Resolution @ 500Hz Readings (Noise Stable) over 100s 18,000 Counts/Divs
Signal Filter Dynamic recursive type user programmable

Module Dimensions: 58mm x 33mm x 13mm
Cable length from USB connector to module: 300mm
Total cable length: as selected in “Termination” option on load cell product page.

* Windows OS only.

** USB Type A connector (other USB types available on request).