Series 490A Hydronic Differential Pressure Manometer

Liquid & Gas Pressure Measurement, ±0.5% FS Accuracy

The SERIES 490A Hydronic Differential Pressure Manometers are versatile, handheld, 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 new feature added to the Series 490A is a field adjustable damping, which allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications.

NEW! 490A-HKIT Option is located in the Product Configurator.

Hydronic meter kit includes: (2) six foot high-pressure rated tubing with shut off valves, high pressure 3-way valve, 8 ft poly tubing for purges, hard travel case, handheld carrying strap, 1/16" x 1 1/2", 1/8" x 3" and 1/8" x 1-1/2" pairs of pressure probes, 90° Flare to 1/4" NPT fittings, adjustable 8" wrench, PTFE Tape, and magnetic protective rubber boot. NIST Calibration Certificate comes standard.

Dwyer Instruments, Inc. was recognized for excellence in product design in the 14th annual Dealer Design Awards Program sponsored by The Air Conditioning Heating & Refrigeration News magazine (The ACHR News). An independent panel of contractors acted as judges in the contest that had 81 entries. The company’s Series 490A-HKit Hydronic Differential Pressure Manometer was the Bronze Award Winner in the Electronic and Hand Tools category. The ACHR News is the leading trade magazine in the heating, ventilating, air conditioning, and refrigeration industries. To read the full announcement please visit http://www.dwyer-inst.com/2017DDABronzeWinner.

California Residents:  Click Here for Proposition 65 WARNING.

Product Applications

  • Chiller to coils for freeze protection
  • Hydronic valve balancing
  • Measure pressure drop across pumps
  • Refrigerant pressure testing

Models & Ordering

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships Price Order
490A-1
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 15 psi (0 to 103.4 kPa) Same Day $686.00 Order
490A-2
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa) Same Day $686.00 Order
490A-3
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 50 psi (0 to 344.8 kPa) Same Day $686.00 Order
490A-4
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa) Same Day $686.00 Order
490A-5
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 500 psi (0 to 3448 kPa) Same Day $686.00 Order
490A-6
Ships: Same Day
Price: $686.00
Wet/Wet handheld digital manometer, 0 to 200 psi (0 to 1379 kPa) Same Day $686.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator

Specifications

Service:
Compatible gases & liquids.
Wetted Materials:
Without valve: 316L SS, -3V option: 316LSS, Buna-N, silicone, grease, PTFE, brass 360, copper, reinforced acetal copolymer.
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°C).
Pressure Hysteresis:
±0.1% FS.
Pressure Limits:
See chart on catalog page.
Electronic 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 chart on catalog page.
Power Requirements:
9 V alkaline battery, installed non-functional, user replaceable.
Process Connections:
Two 1/8" (3.18 mm) female NPT.
Weight:
14.1 oz (400 g).
Agency Approvals:
CE.

Features

  • Seven user-selectable English and metric units
  • Stores up to 40 readings for later recall
  • Backlight for use in dim areas
  • Digital dampening for low pressure - high resolution logging accuracy
  • Automatic resolution adjustment for finer control

Accessories

Model Number Description Usually Ships Price Order
Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop A-402A Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop Same Day $42.25 Order
Rubber boot for manometers (manometer no included). A-47X-BOOT Rubber boot for manometers (manometer no included). Same Day $12.50 Order
A-HKIT-HOSES One pair red & blue 60" SAE replacement hoses for the 490A-HKIT, each with integral ball valve 1-2 Weeks $56.00 Order
A-HKIT-500 Pressure test plug adapter for the 490A-HKIT, 1/8" dia x 1-1/2" length (2 per kit) 1-2 Weeks $45.00 Order
A-HKIT-500XL Pressure test plug adapter for the 490A-HKIT, 1/8" dia x 3" length (2 per kit) 1-2 Weeks $80.00 Order
A-HKIT-510 Pressure test plug adapter for the 490A-HKIT, 1/16" dia x 1-1/2" length (2 per kit) 1-2 Weeks $65.00 Order
A-HKIT-AFIT Adapter kit, includes pairs of SAE 1/4" adapters and elbow fittings. 1-2 Weeks $32.00 Order
A-HKIT-BFIT Adapter fitting kit, includes pair of bleed fitting assemblies. 1-2 Weeks $30.00 Order

Videos

Model Chart

EXAMPLE 490A 1 AT Series 490A-1-AT Wet/Wet Handheld Digital Manometer, range 0-15.00 psi, with aluminum tag.
SERIES 490A     Wet/Wet Handheld Digital Manometer
RANGE   1
2
3
4
5
6
  0-15.00 psi
0-30.00 psi
0-50.00 psi
0-100.0 psi
0-500.0 psi
0-200.0 psi
OPTIONS     AT
COC
FC
NIST
ST
3V
Aluminum Tag
Certificate of Calibration
Factory Calibration Certificate
NIST Traceable Calibration Certificate
Stainless Steel Tag
3-Way Valve with Bleed Screw (100 psi max

Product Literature

Manuals

Catalog Pages

SlideShare

Approvals

Drawings

Questions

Question
Can a Slack tube manometer be used for water pressure?
Answer
That style of manometer is to be used with air/gases only. If you need something that reads water pressure, you would want to use something like our Series 490, Series 490A or Series 1211/1212.

Photo Downloads

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