Dwyer Instruments 490A Specifications
SERIES 490A-HKIT | HYDRONIC DIFFERENTIAL PRESSURE METER KIT
®
FEATURES/BENEFITS
• Up to 0.5% FS accuracy
• Digital dampening for low pressure - high resolution logging stability
• Seven user-selectable English and metric units
•Automaticresolutionadjustmentfornercontrol
• Hard carrying case protects products
• Stores up to 40 readings for later recall
• Backlight for use in dim areas
APPLICATIONS
• Chiller to coils for freeze protection
• Hydronic valve balancing
• Measure pressure drop across pumps
• Refrigerant pressure testing
DESCRIPTION
The SERIES 490A-HKIT features the 490A Hydronic Differential Pressure Manometer
with all the necessary attachments and accessories to meet all your balancing, measuring,
and pressure needs. The manometer featured in this kit is a versatile, handheld, battery
operated manometer available in several ranges for positive or positive differential pressure
measurement and can tolerate most liquid media compatible with 316LSS. A new feature
added to the Series 490A is a eld adjustable damping, which allows the user to choose
the level of display averaging rate corresponding to the uctuation level common in many
applications.
SPECIFICATIONS
Service Compatible gases and liquids.
Wetted Materials 316LSS, PTFE, brass, copper.
Accuracy ±0.5% FS from 60 to 78°F (15.6 to 25.6°C); ±1.5% FS from 32 to 60°F (0 to 15.6°C) and 78 to 104°F (25.6 to 40°C).
Pressure Hysteresis ±0.1% FS.
Pressure Limits See “HOW TO ORDER” section.
Electronic Temperature Limits 32 to 140°F (0 to 60°C).
Process Temperature Limits -20 to 180°F (-28.9 to 82.2°C).
Process Temperature Limits -4 to 176°F (-20 to 80°C).
Display 0.42˝ (10.7 mm) 4 digit LCD.
Power Requirements 9 V alkaline battery, installed non-functional, user replaceable.
Weight 3.6 lb.
Process Connections Two male 45 Flare 1/4˝.
Agency Approvals CE.
dwyer-inst.com
DWYER INSTRUMENTS, INC.
T: 219-879-8000 | F: 219-872-9057 | info@dwyermail.com
800-872-9141
®
2-53/64 [71.73]
1/8 NPT
7-5/64 [179.78]
11
[80.17]
DIMENSIONS
29/32
6-15/64
[158.27]
[22.86]
1-1/4
[31.75]
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
490A -X -HKIT
SERIES
490A - Hydronic Differential Pressure Manometer
PRESSURE
-55/64
[301.23]
HIGH
BLEED
FITTING
2-21/32
[67.47]
3-5/32
2X Ø5/16
[Ø7.94]
LOW PRESSURE
BLEED FITTING
3-5/32
[80.17]
OPTION
-HKIT - Hydronic Meter Kit (Includes NIST)
RANGE
-1 - 0 to 15 psi
-2 - 0 to 30 psi
-3 - 0 to 50 psi
-4 - 0 to 100 psi
-5 - 0 to 500 psi
-6 - 0 to 200 psi
ACCESSORIES
Model Description
A-402A Carrying case, tough gray nylon pouch protects any Series 490A manometer, double
zippered for quick and easy access, belt loop that snaps closed, 7-1/2˝ H x 3˝ W x 2-1/4˝ D
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
dwyer-inst.com
(191 x 76 x 57 mm)
DWYER INSTRUMENTS, INC.
T: 219-879-8000 | F: 219-872-9057 | info@dwyermail.com
800-872-9141
DS-490A-HKIT | 1/18
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