Dwyer | Mercoid | WE Anderson | Flotect

Dwyer Series 490 Digital Manometer

Series 490 Wet/Wet Handheld Digital Manometer

Dwyer Series 490 Digital Manometer
Series 490

Liquid & Gas Pressure Measurement, ±0.5% F.S. Accuracy

The DWYER SERIES 490 DIGITAL MANOMETER is a versatile, hand-held, battery operated manometer 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 490 is a field adjustable damping. 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.


  • Service:Compatible gases & liquids.
  • Wetted Materials: Without valve: Type 316L SS. Additional wetted parts with 3-way valve option: Buna-N, silicone grease, PTFE, brass 360, copper, reinforced acetal copolymer.
  • Accuracy: ±0.5% Full Scale, 60 to 78°F (15.6 to 25.6°C); ±1.5% Full Scale from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C).
  • Pressure Hysteresis: ±0.1% of Full Scale.
  • Pressure Limits: See Ordering page.
  • Temperature Limits: 32 to 140°F (0 to 60°C).
  • Storage Temperature Limits: -4 to 176°F (-20 to 80°C).Display:0.42″ (10.6 mm) 4 digit LCD.
  • Resolution: See Ordering page.Power Requirements:9 V alkaline battery, installed non-functional, user replaceable.Weight:14.1 oz (400 g).
  • Process Connections: Two 1/8″ (3.18 mm) female NPT.
  • Agency Approvals: CE.


  • Measures Virtually any Liquid Media Compatible with 316L Stainless Steel.
  • Instant Selection from up to Seven English/Metric Units.
  • Stores 40 Readings in Memory for Later Reference.
  • Both Audible and Visual Overpressure Alarms.
  • Operates up to 100 Hours on a Single 9 Volt Battery.
  • New Adjustable Dampening Feature for Averaging Fluctuating Readings.


490-10-15.00 psi30 psig
490-20-30.00 psi60 psig
490-30-50.00 psi100 psig
490-40-100.00 psi200 psig
490-50-500.00 psi1000 psig