OhmPi V 2.00 (64 electrodes and 12V)

Ohmpi 2
Ohmpi 2

Note

In this version, we have developed two new board types that allow the assembly of Ohmpi v2.00, a measurement board and a multiplexer board. This new version is made up of:

  1. A measurement board for four-point measurement

  2. 4 multiplexer cards

  3. A box

The philosophy of Ohmpi

The philosophy of Ohmpi V2.00 is to offer a new DIY multielectrode resistivity meter. It is a resistivity meter with 64 electrodes , which can be upgraded to 128 electrodes. It is limited to low-current injection,but suitable for small laboratory experiments and small field time-lapse monitoring. Ohmpi, is developed by a team that seeks to share all its experience and wishes to improve and offer a more and more robust tool to the community.Ohmpi V2.00 is a completely different version from the previous one. We will stop the development on the previous version, to dedicate our efforts on this new version.


Technical data

Parameter

Specifications V1

Units

Specifications v2

Units

Electrodes

32

64 to 128

Operating temperature

-0 to 50

°c

-25 to 50

°c

Power consumption of CPU and control system

18.5

W

18.5

W

Voltage injection

12

V

12

V

Battery

9

V

12

V

Current

0 to 40

mA

0 to 40

mA

Min pulse duration

150

mS

150

mS

Input impedance

80

Mohm

80

Mohm

Data storage

micro SD card

micro SD card

Resolution

O.O1

ohm

O.O1

ohm