The Yocto-milliVolt-Rx device is a high accuracy USB voltmeter. It lets you measure by USB very small voltages (down to a few dozen of microVolts, and up to 2V max), even when they are generated by extremely weak sources (very high impedance).
Typical applications include measurement of electro-chemical reactions (e.g. pH and redox probes), low-voltage sensors (e.g. gaz sensors, etc), or Wheatstone bridges (e.g. load cells, etc). It is also possible to use this device to accurately measure the voltage drop across a shunt to measure high currents.
The input circuit of this device uses a very low bias current amplifier (typ. 0.2 pA). The measure circuit is electrically isolated from the USB bus, which makes it possible to measure grounded voltages without risk of creating a ground loop.
For measuring the weakest signals (e.g. pH measurements), we recommend to use the BNC variant of this product, which features a BNC connector to use with coaxial cable, to avoid electromagnetic interference.
USB cables and enclosures to be ordered separately.
Specifications1Hardware release:Rev. B
Input bias current (typ.):< 1pA
Input impedance:> 1000GΩ
Measuring range:-1000 ... +2000mV
Protection class, according to IEC 61140:class III
USB isolation, dielectric strength (1 min.):1kV
Normal operating temperature:5...40Ðƒ
Extended operating temperature2:-30...85Ðƒ
Supported Operating Systems:Windows (PC + IoT), Linux (Intel + ARM), macOS, Android
Drivers:Driverless, no driver needed
API / SDK / Libraries:C++ Obj-C C# VB.NET UWP Delphi Python Java Android LabVIEW
RoHS compliance:RoHS III (2011/65/UE+2015/863)
Harmonized tariff code:9032.9000
1 These specifications are for the current hardware revision. Specifications for earlier revisions may differ.
2 The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.
Accessories and related products
|User manual (HTML)|
|User manual (PDF)|
|3D file (STEP)|
|Most recent firmware||44118 (03/10/2021)|
|Programming libraries||44175 (03/12/2021)|
|Command line API||44175 (03/12/2021)|
|VirtualHub application||44029 (02/26/2021)|
- Brand: Yoctopuce
- Product Code: RXMVOLT1
- Availability: In Stock