fx-6 UniAmp
fx-3 UniAmp
x-5 UniAmp
UniAmp back
fx-6 and fx-3 include channel for microoptode
Built-in temperature compensation
E2PROM sensor connector

UniAmp Multi Channel

Amplifier portfolio for all Unisense sensors and electrodes including optical sensors

The UniAmp range of amplifier solutions provides open channel configuration and a full level of user friendliness and performance. With the fx-6, fx-3, and x-5 systems, you get our most flexible solutions that meet your needs today and in future applications. Read more...

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Technical Data
Interface and Software
Ordering Information
Manuals & Videos
UniAmp Multi

Connect all sensors

  • Temperature compensation of sensor data
  • E2PROM recognition of unique sensor data
  • USB-powered
  • fx-6 UniAmp with support for ALL Unisense microsensors
  • Ease-of-use, Simple and Smart!

UniAmp Multi Channel is available with channels for amperometric sensors (O2, NO, H2, H2S, N2O), for potentiometric sensors (pH and Redox), and for optical oxygen (OPTO) sensors. All versions include one channel for a temperature sensor needed for temperature compensation of data. When you connect the sensors, they will immediately polarize.

The amplifiers are USB powered. Connect the UniAmp to your PC to automatically initiate the Windows service app. In the app, you can quickly review raw data and amplifier settings.  You can calibrate and log data via our SensorTrace Suite apps.

Temperature compensation

Sensor temperature compensation is available for most of our microsensors. The compensation covers +/- 3°C from calibration point to ensure the quality of your data.

With a standard sensor coefficient of 2-3% per degree Celsius, small sample temperature changes from calibration point of a few degrees will result in considerable errors. With our temperature compensation algorithm, the system will compensate and ensure more accurate data.

Each sensor comes with a factory value for temperature compensation, but you can measure and apply your own value for the sensor.

UniAmp Temp Comp._1400x800

OPTO channel

The fx-6 and fx-3 UniAmp include an optical channel for our OPTO sensors. This gives you the most flexibility, as you can choose amperometric oxygen or optical oxygen depending on your given application. With the fx-6 UniAmp, Unisense offers you the only solution available for all microsensor technologies in one unit.

E2PROM sensor connectors

fx-3 UniAmp_700x400

The 10 pin E2PROM sensor connector can read important information about sensor type, sensor customizations, serial number, calibration data, and the unique value for individual temperature compensation. User calibration can also be stored on the E2PROM to save time during setup and provide flexibility for using multiple sensors and amplifiers. All E2PROM information is read by the UniAmp ensuring correct sensor polarization and setup. Data are transferred to our SensorTrace Suite software for enhanced user experience and experimental documentation.

The new connector format allows for support of our specialized sensors like the STOX sensor for measuring ultra-low (<5nM) oxygen.

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Input and Amplifier
Power and A/D Converter
Response and Signal
Attribute Standard
Dimensions 225 x 165 x 50 mm (W x D x H)
Weight Approx. 1.4 kg (3.1 lbs)
Temperature range Operating conditions 0°C - 50°C (<90% RH non-condensing)
Warranty 1 year
Certification CE
Input and Amplifier
Picoampere pH/mV Optical Temperature Pressure
Sensor Snap connector 10 pin Snap connector 10 pin Optical ST Snap connector 4 pin Built-in
Reference (for mV channels) N/A Banana plug on the cable N/A N/A N/A
Grounding Banana plug Banana plug Banana plug Banana plug Banana plug
Polarization Digitally adjustable N/A N/A N/A N/A
Polarization range ±1.8 V N/A N/A N/A N/A
Input range ±500 pA - 500 nA ±5000 mV N/A -10 to 100°C 300-1,200 mbar
Input impedance N/A >10¹³ Ohm N/A N/A N/A
Power and A/D Converter
Picoampere pH/mV Optical Temperature Pressure
Power supply USB USB USB USB USB
Specification 5V@500 mA (Max 350 mA draw) 5V@500 mA (Max 350 mA draw) 5V@500 mA (Max 350 mA draw) 5V@500 mA (Max 350 mA draw) 5V@500 mA (Max 350 mA draw)
Resolution 16 bit 16 bit 16 bit 16 bit 24 bit
Sampling frequency Digitally adjustable Digitally adjustable Digitally adjustable Digitally adjustable Digitally adjustable
- Default 1 Hz 1 Hz 1 Hz 1 Hz 0.2 Hz
- Maximum 20 Hz 20 Hz 1 Hz 20 Hz 0.2 Hz
Response and Signal
Picoampere pH/mV Optical Temperature Pressure
Response time (90%) <35 msec. <35 msec. <1 sec. <35 msec. <5 sec.
Signal gain factor adjustment 0.1, 1, 10, 100 0.1, 1, 10, 100 0.1, 1, 10, 100 0.1, 1, 10, 100 0.1, 1, 10, 100
Signal offset adjustment ±1 V ±1 V N/A N/A N/A
Interface and Software
Interface and Software
Feature Standard
Digital interface USB
Analog In 2 channels 0-3.3V, 16 bit ADC (optional)
Analog Out 6 Channels 0-4V scaled or unscaled
Digital I/O 5 I/O optional
SensorTrace Logger Included
Other Unisense Software Optional: SensorTrace Profiling
Data rate Default 1 samples/sec.
Software data output CSV, Excel or SQL file
Ordering information
Ordering information
Product Description
fx-6 UniAmp 2x pA, 2x mV, 1x Temp, and 1x Opto channel
fx-3 pA UniAmp 1x pA, 1x Temp, and 1x Opto channel
fx-3 mV UniAmp 1x mV, 1x Temp, and 1x Opto channel
x-5 UniAmp 2x pA, 2x mV, and 1x Temp channel
Customized fx-6 or x-5 UniAmp Customized channel configuration against a fee