Hi James, Thanks for the reply, Yes other one is working.
I know need to replace the broken one.
Was going through the manual and as per manual "any Industry standard ISO Tag or card" can be used.
Now ebay and amazon is filled with proximity tags . Mostly seems to 125khz or 13.56 mhz.
Can I buy any one of them or it has to be genuine scantronic product ( PROXTAGPK5) .