Dwyer Instruments BTM34011D bimetal thermometer 0 to 140°F

What this thermometer measures

The Dwyer Instruments BTM34011D is a bimetal dial thermometer built for environmental and mechanical testing. It reads from 0 to 140 degrees Fahrenheit and from -17.8 to 60 degrees Celsius on a three-inch glass-faced dial. The stainless-steel housing holds a four-inch stem with a half-inch NPT back connection. No NIST-traceable certificate is included.

Who should use it and who should not

Technicians who need a rugged, direct-reading instrument for HVAC, plumbing or process piping will find the range and stem length suitable. Buyers who require a certified calibration document, a digital output or a wider temperature span should look at other models. The fixed back connection also limits installation orientations.

What to verify before ordering

Confirm that a half-inch NPT back mount fits the tapping on your vessel or pipe. Check that the four-inch stem reaches the measurement zone without obstruction. Ensure the 0 to 140 degree Fahrenheit span covers the expected operating temperatures. The glass lens and stainless housing tolerate typical industrial environments.