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Product Code P2005A2
Price £1,450 ex. VAT

Precise and Versatile I-V Measurement of a Range of Devices

Source voltage and measure voltage & current reliably and easily

Overview | Specifications | Features | Gallery | Software | In the Box | Resources and Support

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.

Measure the I-V characteristics of many devices including photovoltaics, LEDs and OLEDs, transistors, and more. The source measure unit contains four instruments on one board — two SMUs (voltage source, current sense) and two precision voltage sense channels. There is also a general-purpose shutter/trigger which enables it to control (or be controlled by) other instruments.

We have used our SMU to develop the Ossila Four-Point Probe to measure sheet resistance, our Solar Cell IV Test System to measure IV curves and OLED lifetime, and the Ossila Potentiostat for cyclic voltammetry.

Source measure unit with two-year warranty

Two-Year Warranty

Buy with confidence

Compact source measure unit


Space saving design

SMU with a versatile voltage range


Range from -10 V to +10 V

Compatible with Ossila software

Free Software

Easily with free PC software


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.

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


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.

Source Measure Unit Features

Five current ranges

Five Independent Channels

Features dual source measure and voltmeter channels. Two SMU channels output voltage while measuring current and/or voltage, and two separate voltage measurement channels measure voltage sourced by external components. The shutter/trigger channel allows external control and programming.

Five current ranges

Wide Voltage and Current Range

Choose between five separate current ranges to suit your experimental needs. Plus, 10 different speed/resolution settings. Take measurements at DC or low frequency over a voltage range from -10 V to +10 V, with a current flow from 10 nano-amps (nA) to 200 milliamps (mA).

Flexible & scalable communication

Flexible and Scalable Communication

Expand your experimental capabilities by connecting the source measure unit via USB, or use several units at the same time via Ethernet connection.

Software-controlled current ranges

Software-Controlled Current Ranges

For safety and convenience, the current range switches can be controlled using the included PC software. There is no need for manual adjustment.

Ossila Source Measure Unit channels SMU Connection Ossila SMU display Ossila Source Measure Unit Ossila SMU


The Source Measure Unit is a professional alternative to old-fashioned and outdated bench top source-measure units at a fraction of cost. Ossila's product was thoroughly tested by us, it had to compete with state-of-art devices and to our surprise it won the race in all categories: precise PV measurements, networking capabilities, flexibility of programming language and smooth operation in pretty tough chemical/material science laboratories. The Ossila team has delivered a game changer for all of the PV community.

Adam Surmiak, PhD Student in Excitonic Systems for Solar Energy Conversion
Monash University, Australia


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

In the Box

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

  • Source measure unit
  • 24 V / 2 A DC power adapter
  • USB-B cable
  • User manual and QC data
  • USB drivers and Front Panel software installer

Resources and Support

OLED Testing Guide

This guide gives you an overview of what to consider when characterising an OLED, as well as tips for their measurement.

Learn more...
I-V Curves: A Guide to Measurement I-V Curves: A Guide to Measurement

An I-V curve (short for 'current-voltage characteristic curve'), is a graphical representation of the relationship between the voltage applied across an electrical device and the current flowing through it.

SMU Quickstart Guide SMU Quickstart Guide

The latest quick start guide for the Ossila Source Measure Unit, to set up your device

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