Quickly verify filter condition, monitor cleanrooms, troubleshoot HVAC systems, or perform field calibrations with the Model 478-0 Digital Differential Manometer. The Model 478-0 is an indispensable tool for the HVAC technician, plant engineer, or industrial hygienist. The electronics are housed in a rugged extruded aluminum case to provide long life and exceptional durability.

The manometer can be used to measure positive, negative, or differential pressures from -60 to 60" w.c. (-150 to 150 mbar). The unit features selectable units in inches w.c. or mbar and a Min/Max function. Press the Hold key to freeze the current pressure measurement on the display. The 478-0 manometer includes a zeroing button to null out any minor pressure differences. To view the display clearly in poorly lighted areas, use the backlight key.

The Model 478-0 Digital Differential Manometer includes a quick start reference guide and a 9 V battery.

SPECIFICATIONS
Service: Air and compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±1.5% F.S. from 32 to 104°F (0 to 40°C).
Pressure Hysteresis: ±0.1% of full scale.
Pressure Limits: -60 to 60" w.c. (-150 to 150 mbar).
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) 4-1/2 digit liquid crystal.
Resolution: 0.01" from -9.99" w.c. to 9.99" w.c.; 0.1" <-10" w.c., >10" w.c.
Power Requirements: 9 volt alkaline battery (up to 40 hours of operation). Battery included but not connected.
Weight: 10.8 oz (306 g).
Connections: Two barbed connection for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing.
Agency Approvals: CE.
Dimensions: 6-9/16" H x 2-13/16" W x 29/32" D.


FEATURES

• Economically Priced.

• Multi-Functioning: Positive, Negative, or Differential Measurement.

• Display Readings in Inches w.c. or mbar.

• Min/Max, Hold and Zero Functions.

• Backlit Display.

• Extruded Aluminum Case.