The test will take 5 days. Are you proposing that this homeopath be held incommunicado for almost a week? I don't think this is likely to be feasible.
At least six days, we will also need at least one unblinded test, we've yet to hear back from Dr Kumar if he would like more.
It's feasible, juries have such conditions imposed upon them regularly. However it is expensive. Since Dr Kumar would be footing the accomodation and catering bill for both the homeopath and the required observer, such a set up may not be in his best interests. In fact it might prove to be cheaper to invest in or hire more temperature sensors so that the 10 trials required can be accomplished that much sooner.
However as Linda correctly pointed out above it is not informaiton about the homeopathic preparation which much be kept from Dr Kumar but the blinding information.
If Dr Kumar can agree to a blinding procedure that only requires the presence of an observer appointed by the testers (on camera for later verifaction, of course) then the problem disappears.
I am sensitive to Dr Kumars needs to have the remedies and placebos handled only by those competant to do so but I think a way round can be found.
Under observation the appointed homeopath prepares a 200C solution of each of two solutions provided to him, they are labelled A and B. The homeopath isn't told which solution is a source for homeopathic remedies as specified by Dr Kumar and which is a dummy provided by the testers. (though depending on the source solution Dr Kumar specifies, this may be obvious, we'll examine that obstacle if and when we come to it - though first thought is that making that blind may not be necessary and second thought is that one homepath can potentitize the solutions up to 30 C, these could be blinded and passed to a second homeopth who potentizes it the rest of the way)
20 pill pots are provided, each is has a label tag numbered 1 to 20 attached by a plastic band stretched over the neck. On the toss of a coin the appointed homeopath prepares a pill from either the 200C A or 200C B solutions. The observer records which pots contains A pills and which contain B pills. The post are sealed.
Both leave.
A second observer enters. They have a bag containing either 20 sticky labels marked 1 to 20 and another 20 tokens also marked 1 to 20. They pick one label at random from the bag and one token from the other bag. They apply the label to the pot with the tag corresponding to the random token. That token is discarded. The numbers are recorded and the tag removed from that pot. This is repeated for the remaining pots.
At no point does this observer handle the pills themselves.
If Dr Kumar would be happy with such a blinding procedure then there would be no need to cloister the homeopath.
If not then there are still other options. There may be qualified homeopaths (or ex homeopaths) that the JREF would be happy to perform the blinding, secure in the knowledge that they would no collude with Dr Kumar. And I'm not just talking about the many members of this forum who have diploma mill qualifications in homeopathy but anyone from Dr Edzard Ernzt down to less recognisable names.
Dr Kumar need sto let us know exactly what sort of qualification he expects from the person who is to prepare these solutions. Would for example a current solid belief in the efficacy of homeopathy be required?