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477: Handheld Digital Manometer

477: Handheld Digital Manometer

Applications: Field calibration, monitoring or trouble shooting HVAC systems, clean rooms, or a wide range of other low pressure pneumatic systems. Air velocity monitoring with pitot tubes. Natural gas appliance line pressure. Air flow and duct static pressure


  • New low pressure ranges
  • Instant selection from up to nine english/metric units
  • Stores 40 readings in memory for later reference
  • Measure positive, negative or differential pressures
  • Measures flow and velocity
  • +/- 0.5% accuracy
  • Large easy-to-read 0.4" LCD display includes switchable backlight for great visibility - anywhere
  • Both audible and visual overpressure alarms
  • Includes + and - indicators plus low battery warning
  • Operates up to 100 hours on a single 9 V battery


Service:Air and compatible gases.
Accuracy:±0.5% FS, 60 to 78°F (15.6 to 25.6°C); ±1.5% FS from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40.0°C).
Pressure Hysteresis:±0.1% of full scale.
Temperature Limits:0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits:32 to 104°F (0 to 40°C).
Storage Temperature Limits:-4 to 176°F (-20 to 80°C).
Display:0.42" (10.6 mm) 4 digit LCD.
Units of Pressure:in w.c., ft. w.c., in Hg, psi, oz/in², mm w.c., cm w.c., mm Hg, mbar, Pa, kPa, hPa.
Units of Velocity:fpm, fps, mph, m/h, m/s, k/h, knot.
Units of Flow:cfm, m3/h, m3/s.
Power Requirements:9 V Alkaline battery, installed non-functional, user replaceable.
Weight:10.2 oz (289 g).
Process Connections:Two barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) ID tubing. Two compression fittings for use with 1/8" (3.18 mm) ID x 1/4" (6.35 mm) OD tubing for 477AV-7 and 477AV-8 only.
Agency Approvals:CE.

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Product : 477
Series/Model Quantity Description
477: Handheld Digital Manometer