• Accurately detects pressure changes to within +/- 0.5hPa.; Alarm signals abrupt changes in pressure.
• Continuous display of current pressure; Continuous display of time or temperature
• Backlighting for night use; Gale warning system
• Can be free standing or bulkhead mounted; Operates on 4 AA batteries (included)
• Also available: 4002A, AC/DC adaptor accessory.

The electronic marine barometer is designed specifically for the mariner. Not only does it show current pressure on the large display, it also displays historical information on a much more expanded scale than most electronic barometers which makes it perfect in a situation where there is a change of watch and the new person on duty can see the changes that have occurred over the last 48 hours in 30 minute increments.