The Dwyer Series 490A Hydronic Differential Pressure Manometesr 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 memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Standard are a hold feature and both visual and audible overpressure alarms.
A new feature added to the Series 490A is a field adjustable damping, independent viewable high/low pressure readings, and low range increased resolution. This allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications.
A 9V alkaline battery is included that provides up to 100 hours of operation.
- 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
Dwyer Series 490A Specifications
|Service:||Compatible gases & liquids.|
|Wetted Materials:||Without valve: 316L SS, -3V option: 316LSS, Buna-N, silicone, grease, PTFE, brass 360, copper, reinforced acetal copolymer.|
|Accuracy:||±0.5% FS, 15.6 to 25.6°C; ±1.5% FS from 0 to 15.6°C and 25.6 to 40°C.|
|Pressure Hysteresis:||±0.1% FS.|
|Pressure Limits:||See chart below|
|Electronic Temperature Limits:||0 to 60°C.|
|Storage Temperature Limits:||-20 to 80°C.|
|Display:||10.6 mm 4 digit LCD.|
|Resolution:||See chart below|
|Power Requirements:||9 V alkaline battery, installed non-functional, user replaceable.|
|Process Connections:||Two 1/8″ (3.18 mm) female NPT.|
Pressure & Resolution Specifications
Series 490A Models Available
|490A-1||Wet/Wet handheld digital manometer, 0 to 15 psi (0 to 103.4 kPa)|
|490A-2||Wet/Wet handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa)|
|490A-3||Wet/Wet handheld digital manometer, 0 to 50 psi (0 to 344.8 kPa)|
|490A-4||Wet/Wet handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa)|
|490A-5||Wet/Wet handheld digital manometer, 0 to 500 psi (0 to 3448 kPa)|
|490A-6||Wet/Wet handheld digital manometer, 0 to 200 psi (0 to 1379 kPa)|