[b]Just for the Halibut, and to kill a few minutes, I got the B&K and the Raytek out for a comparison.

Bang on the same reading here, but remeber everything is at ambient to no difference would be expected.

Top left is the B&K thermocouple, the sensing part is the litle ball on the end - it's about 0.020" in diameter. Top right is the Saito with the sensor trapped under the glow plug (sorry for the glare). Bottom is the B&K LCD on the left, Rayrek on the right.

Bill.