Have you had any luck Loqua? Only I was in Chemist Warehouse today and was looking at digital thermometers, the shop assistant asked if I needed any help, I explained I needed a thermometer for BBT and she whisked me away to a separate section where they had digital 'ovulation thermometers' (and Maybe Baby and OPKs). I bought the model catrionlee has. I think the other ones I was looking at where Surgipack as well, but not packaged as 'ovulation thermometers' .