Brannan's dial thermometers Used in industrial applications, Brannan high quality dial thermometers are trusted around the world. These dials can be customised to measure a range of temperatures, and includes a number of designs for different industrial measurement situations. Available in bi-metal and stainless steel casings, our range includes dial thermometers for use in HVAC including clip on pipe surface dial thermometers, and for use in marine environments, including diesel engine exhaust dial thermometers and capillary exhaust thermometers.