490A-4

490A-4 is a series 490A hydronic differential pressure manometer. It is a versatile, hand-held, battery operated manometer can tolerate most liquid media compatible with 316L stainless steel. A new feature added to the Series 490A is a field adjustable damping, which allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications. Typical applications include chiller to coils for freeze protection, hydronic valve balancing, measure pressure drop across pumps and refrigerant pressure testing.

• Range 0 to 100.0psi
• Seven user-selectable English and metric units
• Stores up to 40 readings for later recall
• Backlight for use in dim areas
• Digital dampening for low pressure - high resolution logging stability
• Automatic resolution adjustment for finer control
• Electronic temperature limits: 32 to 140°F (0 to 60°C), storage temperature limits: -4 to 176°F
• 10.6mm 4 digit LCD display
• Powered by 9V alkaline battery, installed non-functional, user replaceable
• Two 3.18mm female NPT process connection