OEM Source Measure Unit Set

Flexible Solution for OEM Electrical Measurements

Bulk discount for equipment manufacturers

Designed for scientists and engineers working on the next generation of electronic devices, the Ossila Source Measure Unit is one of our most adaptable and fundamental pieces of equipment. Available as a set of boards for easy incorporation into OEM applications, which includes 5 fully functional SMU PCBs individually packaged in antistatic bags.

Each source measure unit contains four advanced instruments on a single board: two SMUs (voltage source and current sense) and two precision voltage sense channels. Plus, the general-purpose shutter/trigger enables it to control (or be controlled by) other instruments.

The Ossila SMU has been the foundation for developing some of our industry-leading systems:

The Four-Point Probe for precise sheet resistance measurement.
The Solar Cell IV Test System and LED Measurement System for IV curve analysis and characterization.
The Potentiostat for conducting cyclic voltammetry.

Specifications

Source Measure Units (SMU 1 & SMU 2)

The SMUs output a voltage and then measure both the voltage and current. The output voltage is always measured on the output to the BNC, rather than assuming it is at the set voltage. This is to account for any load effects, for example, short circuiting the output, or low impedance causing a small drop in voltage. Each source measure unit has multiple current ranges, so that you can measure both large and small currents with accuracy.

Wireframe diagram of the Ossila OEM Source Measure Unit Set — Ossila OEM Source Measure Unit Set wireframe diagram

Voltage Source Specifications

Range	Accuracy	Precision	Resolution
±10 V	10 mV	333 µV	170 µV

Voltage Measure Specifications

Range	Accuracy	Precision	Resolution
±10V	10 mV	50 µV	10 µV

Current Measure Specifications

Range	Max Current	Accuracy¹	Precision²	Resolution	Burden
1	±200 mA	±500 µA	10 µA	1 µA	<20 mV
2	±20 mA	±10 µA	1 µA	100 nA	<20 mV
3	±2 mA	±1 µA	100 nA	10 nA	<20 mV
4	±200 µA	±100 nA	10 nA	1 nA	<20 mV
5	±20 µA	±10 nA	1 nA	0.1nA	<20 mV

¹Accuracy has been measured at the maximum current of the range.
²Precision has been measured at the highest OSR (9).

Precision Voltage Meter Specifications (Vsense 1 and Vsense 2)

The voltage meters are designed to accurately sense small voltages while also having a wide dynamic range (±10 V).

Range	Accuracy	Precision	Resolution
±10 V	10 mV	50 µV	10 µV

Shutter/Trigger

The shutter/trigger can be used either as an input or an output. It can be used to send a trigger signal to other instruments or configured to wait for a trigger from other instruments. The voltage level of this BNC is 5 V because any higher may cause damage to the port.

Ossila Source Measure Unit front panel — The front panel of the Ossila Source Measure Unit highlighting the SMU and Vsense channels

Physical Specifications

Computer Connectivity	USB-B and Ethernet
Measurement Connections	BNC connector
Dimensions (W x H x D)	120.25 mm x 20 mm x 185 mm (4.74" x 0.79" x 7.28")
Rail Dimensions (W x H x D)	5 mm x 1.6 mm x 160 mm (0.2" x 0.06" x 6.3")

Manuals

OEM Source Measure Unit user manual

OEM source Measure Unit programming documentation

OEM Source Measure Unit Features

Five Independent Channels

Dual source measure and voltmeter functionality: two SMU channels for voltage output while measuring current and/or voltage and two dedicated channels for precise measurement of external voltages. Control and program external instruments with the shutter/trigger channel.

Wide Voltage and Current Range

Select from five distinct current ranges tailored to your experimental requirements, along with 10 speed and resolution settings. Perform measurements at DC or low frequencies across a voltage range of -10 V to +10 V, accommodating current levels from as low as 10 nanoamps (nA) to 200 milliamps (mA).

Choose Your Preferred Programming Language

The system is compatible with a wide range of programming languages, including Python, MATLAB, Java, C/C++, and many others, for seamless integration into your workflow.

Software

The Ossila Source Measure Unit includes Front Panel software that enables you to start taking measurements as quickly as possible. With the program you can:

Control each SMU and Vsense channel independently, allowing you to perform many of the most common electrical measurements.
Set voltage and measure current with two independent SMU channels (voltage source, current sense).
Quickly and accurately measure voltages with the two Vsense channels.
Easily set sampling rates for the SMUs and Vsense channels via the interface.
Save your data as a portable spreadsheet (.csv) file or a text (.txt) file for analysis with your favourite software package.

Programming Languages

The user-friendly design works with almost any programming language. Common languages that can be used to interface to it are:

Python

LabVIEW™

MATLAB

Java

Wolfram

C/C++

Perl

Software Requirements

Operating System	Windows 10 or 11 (64-bit)
CPU	Dual Core 2 GHz
RAM	4 GB
Available Drive Space	200 MB
Connectivity	USB 2.0, or Ethernet (requires DHCP)

Ossila Source Measure Unit Software Front Panel — Ossila Source Measure Unit Front Panel PC Software

Other Software

We also have software for performing specific measurements with the Ossila Source Measure Unit. These can be downloaded for free from our software and drivers page. The currently available measurements are:

I-V curves
Solar cell characterisation and lifetime
Four-point probe sheet resistance

Source Measure Unit Gallery

Ossila OEM source measure unit connection

In the Box

The standard items included with the Ossila Source Measure Unit are:

5 x OEM source measure unit PCB in antistatic bag
5 x 24 V / 2 A DC power adapter
5 x USB-B cable
User manual and QC data
USB drivers and Front Panel software installer

Resources and Support

Source Measure Unit: Python Programming Guide

The Ossila Source Measure Unit can be controlled directly over USB or Ethernet using various commands. These can be sent as strings, enabling the use of a large variety of programming languages, including Python, MATLAB, LabVIEW, Java, and C/C++.