The all-purpose potentiostat

IM7

The IM7 is a modular high-end potentiostat / galvanostat including a frequency response analyzer (FRA). The IM7 potentiostat offers 32-bit DC resolution and 24-bit AC resolution across 12 different current ranges, which allows it to carry out precise and accurate measurements.

The IM7x can either be operated by Zahner Lab or by the zahner_link API. The zahner_link libraries communicate with the IM7x via WebSocket connections, exchanging JSON objects. Built with a C++ core, the zahner-link also offers Python bindings for simplified programming.

The main specifications for the IM7 are
  • DC voltage ranges: ±5 V and ±15 V
  • Current up to ±3 A over 12 current ranges
  • EIS frequency range from 10 µHz to 8 MHz
  • Up to 5 parallel channels for EIS (1 PAD42 card)
  • Supported operating systems: Windows, Linux, and macOS
  • Controllable by C++ and Python

Specifications

Download PDF data sheet
Download PDF data sheet
Overall bandwidth
DC - 10 MHz
ADC resolution
32-bit DC
24-bit AC
Harmonic reject
> 60 dB @ ½ full scale
Potentiostat modes
potentiostatic, galvanostatic
OCP, ZRA, off
Cell connection
2-, 3-, 4-terminal kelvin
Ground reference
grounded, floating
Extension slots
4
PC interface
Gigabit Ethernet (GbE)
Dimensions (H x W x D)
160 x 364 x 376 mm3
Weight
11.4 kg
Accessories
dummy cell, testbox, LoZ cable set, HiZ cable set, ethernet cable (3m), mains cable
quickstart installation guide, 3 Zahner Analysis licenses, safety precaution guide
Power supply
100/115/230 VAC, 50/60 Hz,
300 W
Memory
40 GB m.2 SSD

SD card slot (for Recovery)
Ambient temperature
+10 °C to +30 °C
Ambient humidity
< 60% without derating
Storage temperature
-20 °C to +85 °C
Operating system
Windows, Linux, and macOS
Maximum input voltage
±5.5 V

±16 V
5 V range

15 V range
AC Voltage resolution
3.2 nV

9.6 nV
5 V range

15 V range
Voltage accuracy
±50 µV ±5 ppm of reading

±150 µV ±15 ppm of reading
5 V range

15 V range
Current resolution
±2 aA (32 bit)
Current accuracy
±0.5% of reading ±0.2% FS

±0.05% of reading ±0.02% FS

±0.5% of reading ±0.2% FS

±0.5% of reading ±125 fA
300 mA ... 3 A

3 µA ... 300 mA

30 nA ... 3 µA

< 30 nA
Maximum sampling rate
900 kHz at up to 2 channels
3.0 MSps total sampling rate
Input impedance
> 10 TΩ || ±5 pF (typical)
Input leakage current
< |200 fA| typ.

< |2 pA| max.
Impedance range
10 µΩ to 100 GΩ
see accuracy contour plot for detailed information
Common mode rejection
> 86 dB @ 10 µHz to 100 kHz

> 66 dB @ 100 kHz to 8 MHz
Input channel phase-tracking accuracy
±0.05 ° @ 10 µHz to 100 kHz

±0.125 ° @ 100 kHz to 8 MHz
Equivalent effective input noise
1 µV rms / 100 fA rms @ 1 mHz to 10 Hz
Controlled voltage
±5 V

±15 V
Resolution
2.5 nV

7.5 nV
5 V range

15 V range
Accuracy
±150 µV ±15 ppm of reading

±450 µV ±45 ppm of reading
5 V range

15 V range
Integral Nonlinearity
typ. 2 ppm, max. 4 ppm

typ. 6 ppm, max. 12 ppm
5 V range

15 V range
Compliance voltage
±14 V

±28 V
Low compliance voltage mode

High compliance voltage mode
Bandwidth
DC to 10 MHz @ 33 Ω load
IR compensation
auto AC impedance technique

range 0 to 10 MΩ

resolution 0.012%
Small signal rise time
150 ns to 200 µs in 5 steps
automatic selection
Slew rate
15 MV/s
Controlled current
±3 A
Current range
±3 nA to ±3 A in 12 steps
Resolution
32 bit, ±0.2 ppb of FS
Accuracy
±0.05% of reading ±0.02% of FS

±0.2% of reading ±0.1% of FS
≥3 µA to 300 mA

< 3 µA or > 300 mA
Frequency range
10 µHz to 8 MHz
Accuracy
< 0.0025%
Resolution
0.0025%,

10000 steps/decade
AC voltage amplitude
0 to 2 V, 24 bit resolution

0 to 6 V, 24 bit resolution
5 V range

15 V range
AC current amplitude
0 to 2 A, 24 bit resolution
in 12 current ranges
Overall bandwidth
DC - 10 MHz
ADC resolution
32-bit DC
24-bit AC
Harmonic reject
> 60 dB @ ½ full scale
Potentiostat modes
potentiostatic, galvanostatic
OCP, ZRA, off
Cell connection
2-, 3-, 4-terminal kelvin
Ground reference
grounded, floating
Extension slots
4
PC interface
Gigabit Ethernet (GbE)
Dimensions (H x W x D)
160 x 364 x 376 mm3
Weight
11.4 kg
Accessories
dummy cell, testbox, LoZ cable set, HiZ cable set, ethernet cable (3m), mains cable
quickstart installation guide, 3 Zahner Analysis licenses, safety precaution guide
Power supply
100/115/230 VAC, 50/60 Hz,
300 W
Memory
40 GB m.2 SSD

SD card slot (for Recovery)
Ambient temperature
+10 °C to +30 °C
Ambient humidity
< 60% without derating
Storage temperature
-20 °C to +85 °C
Operating system
Windows, Linux, and macOS
Maximum input voltage
±5.5 V

±16 V
5 V range

15 V range
AC Voltage resolution
3.2 nV

9.6 nV
5 V range

15 V range
Voltage accuracy
±50 µV ±5 ppm of reading

±150 µV ±15 ppm of reading
5 V range

15 V range
Current resolution
±2 aA (32 bit)
Current accuracy
±0.5% of reading ±0.2% FS

±0.05% of reading ±0.02% FS

±0.5% of reading ±0.2% FS

±0.5% of reading ±125 fA
300 mA ... 3 A

3 µA ... 300 mA

30 nA ... 3 µA

< 30 nA
Maximum sampling rate
900 kHz at up to 2 channels
3.0 MSps total sampling rate
Input impedance
> 10 TΩ || ±5 pF (typical)
Input leakage current
< |200 fA| typ.

< |2 pA| max.
Impedance range
10 µΩ to 100 GΩ
see accuracy contour plot for detailed information
Common mode rejection
> 86 dB @ 10 µHz to 100 kHz

> 66 dB @ 100 kHz to 8 MHz
Input channel phase-tracking accuracy
±0.05 ° @ 10 µHz to 100 kHz

±0.125 ° @ 100 kHz to 8 MHz
Equivalent effective input noise
1 µV rms / 100 fA rms @ 1 mHz to 10 Hz
Controlled voltage
±5 V

±15 V
Resolution
2.5 nV

7.5 nV
5 V range

15 V range
Accuracy
±150 µV ±15 ppm of reading

±450 µV ±45 ppm of reading
5 V range

15 V range
Integral Nonlinearity
typ. 2 ppm, max. 4 ppm

typ. 6 ppm, max. 12 ppm
5 V range

15 V range
Compliance voltage
±14 V

±28 V
Low compliance voltage mode

High compliance voltage mode
Bandwidth
DC to 10 MHz @ 33 Ω load
IR compensation
auto AC impedance technique

range 0 to 10 MΩ

resolution 0.012%
Small signal rise time
150 ns to 200 µs in 5 steps
automatic selection
Slew rate
15 MV/s
Controlled current
±3 A
Current range
±3 nA to ±3 A in 12 steps
Resolution
32 bit, ±0.2 ppb of FS
Accuracy
±0.05% of reading ±0.02% of FS

±0.2% of reading ±0.1% of FS
≥3 µA to 300 mA

< 3 µA or > 300 mA
Frequency range
10 µHz to 8 MHz
Accuracy
< 0.0025%
Resolution
0.0025%,

10000 steps/decade
AC voltage amplitude
0 to 2 V, 24 bit resolution

0 to 6 V, 24 bit resolution
5 V range

15 V range
AC current amplitude
0 to 2 A, 24 bit resolution
in 12 current ranges
Modular System

Extensions

IM7

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High power extensions

Extend your IM7 potentiostat with our dynamic electronic load (EL1002) for EIS measurements on battery, fuelcell or electrolyzer stacks. Measurements with current up to 680 A can be carried out for stack with voltages of up to 100 V. Sine excitation of up to 1 kW can realize precise EIS measurements on large fuel cell, electrolyzer and battery system.

EL1002

The dynamic electronic load EL1002 is optimized for EIS measurements on high power objects. It extends the power range of the IM7/ZENNIUM series potentiostats. Objects of up to 100 V can be characterized by EIS up to 100 kHz . In combination with third-party devices the current range can be extended up to 680 A .

Addon cards

The functionality of the IM7 potentiostat can be extended with addon cards. With extension cards additional analog and digital in- & output signals can be processed; power ranges can be optimized and extended.

PAD42

A PAD42 card provides four additional voltage or current sense channels. The PAD42 card is primarily used for battery, fuel cell and electrolyzer applications where electrochemical measurements for each cell in a stack can be recorded synchronously in a single measurement. The IM7x can be upgraded with up to eight PAD4 cards, which enables it to measure up to 33 input signals in a single measurement.

RMUX16 card

RMUX16

The RMUX16 card allows to simultaneously connect up to 16 individual cells to the potentiostat. Up to four RMUX16 cards can be installed in a IM7/ZENNIUM series potentiostat which allows simultaneous connection to up to 64 electrochemical cells. The measurements on all connected cells are carried out sequentially. The RMUX16 card is an ideal addition for routine and screening measurements on small samples.

TEMP-U2

Zahner TEMP-U2 enables the temperature measurements by direct connection of two thermocouples. Two additional voltage input channels are available and provide the opportunity to record additional variables during the electrochemical measurement. For example, the voltage channels can be configured with a pH electrode or a pressure chamber to record the pH value or chamber pressure during the measurement.

MIO

The MIO provides four analog output channels with a voltage range of ±10 V. In addition the MIO card is also equipped with four isolated digital input- and four isolated digital relay output channels. The MIO addon card is used to receive and send trigger signals between the IM7/ZENNIUM potentiostats and a third-party device.

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