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Make impedance measurements on up to eight batteries

The EIS Box™ is a multiplexed eight channel instrument designed for impedance measurements on batteries (or other devices such as supercapacitors or fuel cells) and is typically used in conjunction with a battery cycler.  It is isolated from ground and is capable of EIS from 100 kHz down to 10 µHz and comes in a 3U 19" rack-mountable chassis. 

  • EIS on up to eight cells
  • 10 µHz to 100 kHz*
  • Includes 3 m cables
  • Ethernet based
  • Up to 6V per channel
*Specifications subject to change
*For Windows 10 Operating System Only

Destaques do Sistema

The EIS Box comes with 8 x 3 m cell cables and is designed to be used in conjunction with a battery tester/cycler to provide impedance testing. Cycle testing of the battery would be provided by the battery tester/cycler. It can be installed in a 19-inch rack (similar to the ECM8 multiplexer). Connection to the EIS Box is made through ethernet or USB. As with a USB connection to our potentiostats, the EIS Box has to be in constant contact with the host computer for experiments to be performed successfully. Connection via ethernet is done via a direct connection to the computer or over a local network only; connection over the internet is not possible.

Though the EIS Box was designed for single cell measurements of individual cells, it can measure voltages within a stack of cells. Each EIS Box channel can measure a +/- 5V cell whose maximum voltage does not exceed 28V versus ground. Additionally, the EIS Box cannot measure more than 28V total in a stack. For example, if you had eight or more 4.2V cells in a stack, the EIS Box cannot measure more than the first six in that stack. Please contact us if you need further explanation for this special application. 




Cell Connections Four
Number of Cells Up to Eight
Cables Set of Current and Sense Cables – 3 m standard length
DC Power Input Voltage  100-240, 50-60 Hz, 2.1A
Connection to computer Ethernet or USB
EIS Measurement 10 uHz to 100 kHz*
(*specifications subject to change)
Max AC Amplitude

3 V or 5 A

Accuracy See Accuracy Contour Plot
Weight Approximately 25 lb (10 kg)

5.25”x18.875”x18.875” (13.3 cm H x 41.5 cm W x 45.7cm D)

Power Max 120W

Fits 19” (48.3 cm) standard rack mount
3 U height


IEC 127
For 115 VAC, use 6.3 A 250 V
For 230 VAC, use 3.153 A 250 V


Compliance Voltage Min. ±6.5 V
Output Current Min. ±5 A
Unity Gain Bandwidth 1050, 250, 43, 4.4, 0.5 kHz
Slew Rate 10, 4.4, 0.7, 0.07, 0.007 V/µs


Max Input Voltage

Max ±6.0 V

Input Current Max 25 pA

Input Resistance

Differential (between inputs)
Common Mode (input to ground)


10 TΩ
1 TΩ

Input Capacitance 

Differential (between inputs)
Common Mode (input to ground)


8 pF

Bandwidth (–3 dB)

 Min 12 MHz


DC to 10 kHz
10 kHz to 100 kHz


98 dB
88 dB



A/D Full Scale Ranges

±6.5536 V

Resolution (before gains) 200 µV/bit

Zero Offset Error

0.5 mV

Gain Error


Offset Range

±6.5536 V

 Post-offset Gain

 1×, 10×, 100×


Maximum Full-scale Range

±5 A

Minimum Full-scale Range

±50 µA
±500 (after 100× gain) nA

Voltage across Rm

±100 mV at full scale

 Input Offset Current

 Max 25 pA 

Range Zero Offset

 Max 0.05% of range

Gain Tolerance, 5 A to 50 µA ranges

 Max 0.2% of range

Bandwidth (-3 dB)

5 MHz



0.00333…% FS/bit

Offset Range

±100% of range

Post-offset Gain

1×, 10×, 100×


Dominated by current-to-voltage error
(see above)




Operating Temperature Range 

 0 to +45°C

Relative Humidity  Max 90% (non-condensing)

Storage and Shipping Temperature

–25 to +75°C

Maximum Shipping Acceleration