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Series 490A Hydronic Differential Pressure Manometer
Brand: Dwyer Instruments, LLCThe SERIES 490A Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges for positive or positive differential pressure measurement and can tolerate most liquid media compatible with 316LSS.
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.
Features- 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 accuracy
- Automatic resolution adjustment for finer control
Specifications
Accuracy
- ± 0.5 % of Full Scale
- ± 1.5 % of Full Scale
Approvals & Certifications
- CE
Dimensions
- 7-1 / ”H x 3” W x 2-1/4”D (191 x 76 x 57 mm)
Display
- 0.42” (10.6 mm)
- 4-Digit LCD
Hysteresis
- ± 0.1 % of Full Scale
Media
- Compatible Gases
- Liquids & Gases
NACE & NIST
- NIST Traceable Calibration Certificate
NPT Connection
- 1/8” NPT Female
Power Requirement
- 9 V Alkaline Battery
Pressure Range
- psi: 0 to 500 (kPa: 0 to 3,447, bar: 0 to 34.47)
Pressure Units
- bar
- Feet WC
- Inches Hg
- Inches WC
- kPa
- mbar
- Millimeters Hg
- psi
Storage Temperature
- -20° to 80° C (-4° to 176° F)
Supply Pressure - Maximum
- psig: 30 to 400 (kPa: 207 to 2,758, bar: 2 to 27)
Temperature Range
- 0° to 60° C (32° to 140° F)
Wetted Materials
- 316L Stainless Steel
- Brass 360
- Buna-N
- Copper
- PTFE
- Reinforced Acetal Copolymer
- Silicone Grease
- Chiller to coils for freeze protection
- Hydronic valve balancing
- Measure pressure drop across pumps
- Refrigerant pressure testing