Dwyer 490-4


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Primo number :DW4904
Brand :Dwyer
Brand number :490-4

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DWYER 490-4 WET/WET HANDHELD DIGITAL MANOMETER, RANGE 0-100.00 PSI, MAX. PRESSURE 200 PSIG • 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. Series 490 Digital Manometers are versatile, hand-held, battery operated manometers 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. APPLICATIONS • Balance hydronic heating or cooling water loops. • Check pump or chiller performance. • Determine pressure head loss from valves and pipe reduction. SPECIFICATIONS 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% F.S., 60 to 78°F (15.6 to 25.6°C); ±1.5% F.S. 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 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. Resolution: See Ordering page. Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable. Weight: 14.1 oz (400 g). Connections: Two 1/8" (3.18 mm) female NPT. Agency Approvals: CE.

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