That is better in cheap units you kinda have to live with 1º so yours are fair currently.

Um my RTD... they are not cheap.

sit down before clicking the link...
https://www.fishersci.ca/coupon.do?cid=200384

I use these cheap ones
http://www.ebay.ca/itm/LCD-Digital-F...ht_2627wt_1165

The herpstats are actually quite accurate and cheap compared to good thermometers.