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ADU70 USB Load Cell interface

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ADU70 USB Load Cell Interface

The ADU70 USB Load Cell Interface enables wheatstone bridge measurements with 24-bit resolution at sample rates up to 150Hz.  The internally isolated excitation voltage of 5.000V is suitable for most wheatstone bridge based load cells. This low-cost USB Load Cell Interface is easy to use with VB, and Visual C++ or .NET via standard HID drivers included with Windows 98,2000,XP,7,8. A mini-driver ( DLL )* is also provided allowing control using standard ASCII commands using familiar readfile , writefile commands. The ADU70 includes a 10' USB cable and is available in a flange mount enclosure with a DIN rail mount option.

Click here to view Quick Start Quide. ( PDF)

Download ADU70 User Manual (PDF )

* View AduHid.dll  on-line software develoment kit ( SDK ) on our Programming page.

Key Benefits, ADU70 USB Load Cell Interface

  • USB load cell interface with precision bridge excitation source.
  • Ratiometric configuration provides outstanding absolute( .01%) and relative (.003%) accuracy.
  • 24 bit resolution
  • Internal isolated bridge excitation supply derived from USB bus.
  • Programmable gain from 1 to 128.
  • Programmable sample rate up to 150Hz.
  • Programmable buffer for high impedance sources.
  • Programmable CHOP function to minimize offset and offset drift.
  • 2500V Isolation
  • Conformally coated sensing circuitry.
  • High retention USB Connector
  • CE Marked
  • Bi-colour LED status indicator.
  • High quality cage-clamp type terminal blocks.
  • Uses standard HID drivers included with Windows 98SE,2000,XP,7,8,10 32-bit or 64-bit
  • Mini-driver ( DLL ) provided for use with VB,VC, .NET, LabVIEW,MatLAB, TestPoint and others. See Programming Page
  • Meets IEC61000-4-2 ESD protection for USB port.
  • Available in flange ( standard ) or DIN rail mount.

Specifications, ADU70 USB Load Cell Interface

General ADU70
Supply Voltage NONE ( Bus Powered )
USB Supply Current 70mA  Typical  100mA Max
Operating Temperature -25C Min  to  85C Max
Isolation 2500V
Load Cell Input
(Ratiometric Bridge Measurement)
Resolution 24 Bits
Total Absolute Unadjusted Error  +/- 0.02%FSR MAX @ 25C
Relative Error +/- 0.003% FSR MAX @ 25C
Temperature Stability +/- 3 ppm FSR/Degree C
Bridge Resistance 200 ohms or greater
Programmable Input Ranges +/-
5V, 625mV, 312.5mV, 156.2mV, 78.125mV,  39.06mV
Bipolar Voltage Input
(Absolute Voltage Measurement )
Resolution 24 Bits
Total Absolute Unadjusted Error  +/- 0.05% FSR MAX @ 25C
Temperature Stability +/- 10 ppm FSR/Degree C
Input Current Buffered - +/- 3nA
Unbuffered - +/- 8uA
(Varies with voltage GAIN=1)
Programmable Input Ranges +/-
5V, 625mV, 312.5mV, 156.2mV, 78.125mV,  39.06mV
Special Functions
Internal Bridge Excitation 5.000 Volt Bridge Excitation
Excitation Current 30mA Max.
Mounting Options Flange Mount ( STANDARD ) , DIN Rail

Pricing,  ADU70 USB Load Cell Interface

( Includes 10' USB cable )

Description $US
ADU70 $169.00
ADU70 QTY 5-9 $158.00
ADU70 QTY 10+ $149.00

IMPORTANT: Specify mounting option when ordering.  -FLANGE ( standard )  or -DIN . See Mounting Options for details.

For example: ADU70-FLANGE      ADU70-DIN 


ADU products do not ship with drivers on floppy or CD-ROM. Drivers, including complete SDK can be downloaded or viewed on-line in the Programming Section.

Pricing indicated is for ADU71 USB interface with flange mount enclosure, printed user manual,  and a 10' USB cable.  

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Ontrak Control Systems Inc.
764 Notre Dame Ave., Unit #1
Tel: (705) 671-2652 General Information Sales or Support
Sudbury,Ontario Fax:(705) 671-6127
CANADA P3A 2T2    
Next-Day shipping anywhere in Continental U.S. via Fed-Ex
Copyright 2012 ONTRAK CONTROL SYSTEMS 764 Notre Dame Ave, Unit #1 , Sudbury, Ontario, CANADA P3A 2T2  
"Quality serial Data Acquisition Interfaces"           PH. (705) 671-2652 FAX (705) 671-6127