The Precision Ring Barometer has the same superb movement as the P111 Precision Barometer, giving accuracy to +/-1.5 Hpa or 0.05 in. Hg. It has a chrome case, ring at the top, and scales in inches (27.5-31.5) and millibars (931-1067).
This type is sometimes called an Engineer?s Barometer, because it is portable for carrying into the field for testing. A knife-edge pointer permits precise reading. 5 1/4? dia. x 1 1/2? D.
