Product Description
0–15 PSI Hydronic Differential Pressure Manometer – Series 490A-1
The Series 490A-1 Hydronic Differential Pressure Manometer is engineered for HVAC, hydronic balancing, and pump verification where accurate low-pressure differential measurement is critical. Featuring ±0.5% full-scale accuracy, handheld battery-powered operation, and rugged 316L stainless wetted components, this instrument handles both liquid and gas service in demanding field environments.
Field-adjustable digital damping allows technicians to stabilize fluctuating readings for high-resolution logging, while onboard memory stores up to 40 measurements for later recall during system commissioning and troubleshooting.
Pressure Range, Accuracy & Construction
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Pressure Range: 0–15 PSI
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Metric Range: 0–103.4 kPa
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Accuracy: ±0.5% F.S. (60–78°F)
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Extended Temp Accuracy: ±1.5% F.S. outside nominal range
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Pressure Hysteresis: ±0.1% F.S.
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Service Media: Compatible liquids and gases
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Wetted Materials:
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Standard: 316L SS
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-3V Option: 316L SS, Buna-N, Silicone, PTFE, Brass, Copper, Reinforced Acetyl
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Process Connections: Two 1/8" Female NPT
Display, Logging & Power
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Display: 4-digit LCD, 0.42" height
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Backlight: Yes
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Selectable Units: English & metric (7 total)
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Memory: Stores up to 40 readings
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Digital Damping: Field adjustable
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Automatic Resolution: For fine-pressure control
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Power: 9V battery (user replaceable)
Hydronic & HVAC Applications
Ideal for:
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Hydronic valve balancing
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Chiller-to-coil freeze protection
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Pump differential pressure testing
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Refrigerant pressure measurement
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HVAC commissioning
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System diagnostics
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Process flow verification
Why Choose the Series 490A Hydronic Manometer?
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Differential pressure capability for hydronic systems
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Digital damping stabilizes turbulent readings
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Handheld portability for field service
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Data storage for commissioning documentation
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Wide fluid compatibility with 316L SS sensors
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Backlit display for mechanical rooms and low-light areas
Technical Specifications
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Electronic Temp Limits: 32–140°F
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Storage Temp: -4–176°F
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Weight: 14.1 oz
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Agency Approvals: CE
Shipping Information
Ships in 1–2 business days, subject to availability.
