http://www.harriscal.com/2003/specgastemplate.asp?MN=HP+703

FEATURES

• 2-1/8” 302 stainless steel diaphragm eliminates contamination from diffusion or outgassing
• One-piece encapsulated seat design to protect seat from particulate contamination
• Chrome plated bonnet, body and fittings
• 2” Chrome plated dual scale gauges (psi/bar)
• External relief valve standard
• 1 x 10-8 cc/sec. inboard helium leak rate maintains gas purity levels