Stainless Steel Low Gas Pressure Alarm ELECTRONIC 110 VAC Power CGA Connections With Audio/Visual Alarm And Silence Button

The Series 9900 complies with the requirements of NFPA 99 2002 paragraph 5.1.10.5.5 that mandates the continuous monitoring of purge gas while welding or brazing gas lines.

The way the part number works is the middle numbers are the alarm and reset points. Example below is to alarm at 50 psi decreasing and reset ate 60 psi increasing. The alarm point can be from 10 – 2800 psig. Reset point can be anything higher than the alarm point. Recommend +10 psi or more. Other ranges possible upon request. EXAMPLE P/N 9920E-50/60-580

These alarms are ideal for any gas application where a decrease in gas pressure could be detrimental to the operation.

Rated for 3000 psig the Series 9900 can be installed between the cylinder valve and the user’s pressure regulator or system. At low pressure, the Series 9900 provides both and audible and visual alert to the user when the container pressure reaches the pre-set level. Units are available in brass or stainless steel with the appropriate CGA connections for easy installation between an existing cylinder and regulator, or with pipe threads or compression fittings for permanent installation into a gas supply system.

Standard models require 110 VAC power. 

• Wide range of alarm pressure selection
• Available in brass or stainless steel
• CGA connections inlet and outlet
• Complies with the requirements of NFPA 99 2002 paragraph 5.1.10.5.5
• Choice of power source – 110 VAC, 
• Provides both an audio (~90 dB @ 10 feet) and a visual
• Mating inlet and outlet connections