O2 UniAmp
pH Redox UniAmp
H2 UniAmp
N2O UniAmp
H2S UniAmp
UniAmp back
Single sensor channel plus temperature
Built-in temperature compensation
E2PROM sensor connector

UniAmp Single Channel

Economic amplifier portfolio for single analytes - O2, pH/mV, H2, N2O or H2S

With the UniAmp Single Channel, you get our most cost-effective solutions with dedicated channel configuration for O2, pH/mV, H2, N2O, and H2S. You should consider the UniAmp Multi Channel, if you need multiple sensors or a system that is more flexible for future applications. Read more...

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

Innovative amplifier solutions with unique features

  • Temperature compensation of sensor data
  • E2PROM recognition of unique sensor data
  • USB-powered
  • Cost-effective solutions for dedicated measuring needs
  • Easy-to-use, simple, and smart

UniAmp Single Channel is available in various configurations with dedicated channels for O2, pH/mV, H2, N2O, or H2S. All versions include one channel for a temperature sensor for temperature compensation of data.

The amplifier is USB powered, and the sensors immediately polarize when connected. 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 was once reserved for optical sensors. However, based on long-time in-house data temperature compensation is available for most of our microsensors.

The compensation covers +/- 3°C from calibration point, thus ensuring you better 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 your own value for the sensor and apply this value.

UniAmp Temp Comp._700x400

E2PROM sensor connectors

The 10 pin E2PROM sensor connector reads 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 concentrations.

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 Temperature Pressure
Sensor Snap connector 10 pin Snap connector 10 pin Snap connector 4 pin Built-in
Reference (for mV channels) N/A Banana plug on the cable N/A N/A
Grounding Banana plug Banana plug Banana plug Banana plug
Polarization Digitally adjustable N/A N/A N/A
Polarization range ±1.8 V N/A N/A N/A
Input range ±500 pA - 500 nA ±5000 mV -10 to 100°C 300-1,200 mbar
Input impedance N/A >10¹³ Ohm N/A N/A
Power and A/D Converter
Picoampere pH/mV Temperature Pressure
Power supply 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)
Resolution 16 bit 16 bit 16 bit 24 bit
Sampling frequency Digitally adjustable Digitally adjustable Digitally adjustable Digitally adjustable
- Default 1 Hz 1 Hz 1 Hz 0.2 Hz
- Maximum 20 Hz 20 Hz 20 Hz 0.2 Hz
Response and Signal
Picoampere pH/mV Temperature Pressure
Response time (90%) <35 msec. <35 msec. <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
Signal offset adjustment ±1 V ±1 V 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
O2 UniAmp 1x pA for Oxygen, 1x Temp channel
pH/Redox UniAmp 1x mV for pH and Redox, 1x Temp channel
H2 UniAmp 1x pA for Hydrogen, 1x Temp channel
N2O UniAmp 1x pA for Nitrous Oxide, 1x Temp channel
H2S UniAmp 1x pA for Sulfide (H2S and SULF), 1x Temp channel