Features :

• Solid CNC machined aluminum alloy with black anodized finish
• Case is bayonet mounted to the base providing a remarkably easy method for adjustments, replacing batteries or for storage
• Glass lens in double O-ring seal for vibration, impact and thermal expansion protection
• Barometers water-resistant, spray and splash proof
• Clocks water-resistant to a depth of 100 feet
• Unique polycarbonate moveable multi-purpose index markers
• Patented "Hi-Sensitive" all metal aneroid movement with expanded scale (NAU-04, NAU-04-IN, NAU-04HB & NAU-04-HBIN)
• Easy to read, fluid dampened inclinometer with brightly colored background (Model NAU-01-IN, NAU-04-IN & NAU-04HBIN)
• Unique hydrophobic filter that allows air pressure to penetrate yet resists water (Model NAU-01-IN, NAU-04-IN & NAU-04HBIN)
• Dial diameter: 3.75"
• Weight: 2.5 lbs
• Quartz Clock requires one “AA” battery (not incl.) (NAU-01 & NAI-01-IN)
• Hybrid Digital to Analog Barometer requires two “AAA” batteries (not incl.) (NAU-04HB & NAU-04-HBIN)
• Five year manufacturer’s warranty
• U.S. Design Patent # USD459,256 S
• Other patents pending