While you say Acu-rites are "consistent"... you may be correct, however, "consistently off by +/- 4 degrees" should be more like it, which is pretty dangerous for BPs... especially for secondary/tertiary monitoring of incubation temps. The digital thermometers that Reptile Basics sell are extremely accurate AND consistent. I have personally studied BOTH (in addition to a few other digi thermometers) and RB sells the best ones... and for less than $10, absolutely cannot be beat.