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Dwyer 490A-2 Handheld Hydronic Differential Pressure Manometer
- Regular price
- $1,699.00
- Sale price
- $1,699.00
- Regular price
-
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Product Description P/N: 490A-2
Description
Dwyer 490A-2 is a handheld digital manometer for measuring differential pressure in hydronic systems. It measures from 0 to 30 psi with ±0.5% full-scale accuracy and supports multiple pressure units on its LCD.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Dwyer |
| Category | Pressure Measurement |
| Part Number | 490A-2 |
| Subcategory | Digital Differential Manometers |
| Series | 490A |
| Instrument type | Handheld hydronic differential pressure manometer |
| Pressure range | 0–30 psi (0–206.9 kPa) |
| Maximum pressure | 60 psi (413.7 kPa) |
| Accuracy | ±0.5% FS at 60–78°F (15.6–25.6°C) |
| Pressure hysteresis | ±0.1% FS |
| Display | Four-digit LCD |
| Process connections | Two 1/8 in. female NPT |
| Power source | 9 V alkaline battery |
| Weight | 400 g |
Information About 490A-2
The 490A-2 is part of Dwyer’s Series 490A hydronic differential pressure manometers. Its wet/wet design measures pressure differences in compatible gases and liquids through two 1/8 in. female NPT connections. The four-digit LCD displays readings in selectable engineering units, and the handheld instrument operates on a replaceable 9 V alkaline battery. It is suited to field checks of hydronic heating and cooling systems.
Key Features:
-
Differential Pressure Measurement: Measures positive and positive differential pressure in compatible liquids and gases.
-
Pressure Range: Measures differential pressure from 0 to 30 psi (0 to 206.9 kPa).
-
Maximum Pressure: Withstands pressures up to 60 psig (413.7 kPa).
-
High Measurement Accuracy: Provides ±0.5% full-scale accuracy under specified reference temperature conditions.
-
Digital LCD Display: Features a four-digit LCD with 0.42-inch (10.6 mm) characters.
-
Multiple Measurement Units: Offers seven selectable English and metric pressure units for different testing requirements.
-
Adjustable Digital Damping: Allows adjustment of display averaging to stabilize readings when pressure fluctuates.
-
Reading Memory: Stores up to 40 measurements for later review.
-
Backlit Display: Improves visibility when working in dimly lit mechanical rooms and equipment spaces.
-
Battery Operation: Uses a replaceable 9 V alkaline battery for portable field measurements.
-
Process Connections: Includes two 1/8-inch female NPT pressure connections with 316 stainless steel wetted components.
The 490A-2 delivers accurate differential pressure measurement for hydronic system balancing, pump pressure-drop testing, HVAC troubleshooting, and liquid pressure testing.
Description
Dwyer 490A-2 is a handheld digital manometer for measuring differential pressure in hydronic systems. It measures from 0 to 30 psi with ±0.5% full-scale accuracy and supports multiple pressure units on its LCD.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Dwyer |
| Category | Pressure Measurement |
| Part Number | 490A-2 |
| Subcategory | Digital Differential Manometers |
| Series | 490A |
| Instrument type | Handheld hydronic differential pressure manometer |
| Pressure range | 0–30 psi (0–206.9 kPa) |
| Maximum pressure | 60 psi (413.7 kPa) |
| Accuracy | ±0.5% FS at 60–78°F (15.6–25.6°C) |
| Pressure hysteresis | ±0.1% FS |
| Display | Four-digit LCD |
| Process connections | Two 1/8 in. female NPT |
| Power source | 9 V alkaline battery |
| Weight | 400 g |
Information About 490A-2
The 490A-2 is part of Dwyer’s Series 490A hydronic differential pressure manometers. Its wet/wet design measures pressure differences in compatible gases and liquids through two 1/8 in. female NPT connections. The four-digit LCD displays readings in selectable engineering units, and the handheld instrument operates on a replaceable 9 V alkaline battery. It is suited to field checks of hydronic heating and cooling systems.
Key Features:
-
Differential Pressure Measurement: Measures positive and positive differential pressure in compatible liquids and gases.
-
Pressure Range: Measures differential pressure from 0 to 30 psi (0 to 206.9 kPa).
-
Maximum Pressure: Withstands pressures up to 60 psig (413.7 kPa).
-
High Measurement Accuracy: Provides ±0.5% full-scale accuracy under specified reference temperature conditions.
-
Digital LCD Display: Features a four-digit LCD with 0.42-inch (10.6 mm) characters.
-
Multiple Measurement Units: Offers seven selectable English and metric pressure units for different testing requirements.
-
Adjustable Digital Damping: Allows adjustment of display averaging to stabilize readings when pressure fluctuates.
-
Reading Memory: Stores up to 40 measurements for later review.
-
Backlit Display: Improves visibility when working in dimly lit mechanical rooms and equipment spaces.
-
Battery Operation: Uses a replaceable 9 V alkaline battery for portable field measurements.
-
Process Connections: Includes two 1/8-inch female NPT pressure connections with 316 stainless steel wetted components.
The 490A-2 delivers accurate differential pressure measurement for hydronic system balancing, pump pressure-drop testing, HVAC troubleshooting, and liquid pressure testing.
