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at least this is working great on my sauna with Tellstick.Net. It's UPM, product number is WS334. Sauna thermometer is WT1454, it should be working up to +140 degree. Humidity measurement is not working correctly. I bought it from Finland, shop called Hong Kong, it's also available in Motonet http:/...

Check first from Motonet (you can see their stock from web page), I don't know if this is still available in Hongkong as I bought my package two years ago. You need to buy whole package (weather station + two thermometer + external sensor), I haven't see Sauna thermometer sold separately. I don't kn...