The process which is being carried out in full swing in Kanniyakumari Medical College is nearing completion, according to officials.
Getting 75 per cent attendance will no longer be mandatory for students alone.
An order issued on Friday said a total of 16,430 devices are being sent to all districts.
The CRC also advised the candidates to avoid mehendi or henna on left thumb, as it may reduce the accuracy of the biometric details.
As the biometric system has been installed in offices across the state during the last one year, many fail to make it in time.
The new system will be introduced at rythu bazaars near Alcot Gardens, VL Puram, Y Junction, Sambhunagar, Nataraj and Ganesh Chowk.