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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.
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
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. |
| Weight: | 400 g. |
| Agency Approvals: | CE. |
Pressure & Resolution Specifications
Series 490A Models Available
| Model | Description |
|---|---|
| 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) |
