Series 424 Durablock® Inclined/Vertical Manometer

Accuracy to ±0.25%

Dwyer® SERIES 424 inclined-vertical manometer are extremely accurate instruments designed and made especially for precision measurement of low differential pressures in laboratory and test applications. The inclined range bore has a length of 20" to provide ample multiplication of indicating fluid movement in this critical lower part of the range.

Click here, if you require a Safety Data Sheet for the Blue Gage Fluid or the Red Gage Fluid.

Product Applications

  • Low pressure laboratory and test applications

Models & Ordering

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Model Description Usually Ships Price Order
421-10
Ships: 1-2 Weeks
Price: $993.00
Inclined/vertical manometer, inclined range: 0-1.0" w.c., .01 min. div., 6-1/2" scale; vertical range 1.1-10" w.c., min. div. .10, 10-1/8" scale. 1-2 Weeks $993.00 Order
421-23
Ships: 1-2 Weeks
Price: $1,290.00
Inclined/vertical manometer, inclined range: 0-2.2" w.c., .02 min. div., 6-1/8" scale; vertical range 2.4-23" w.c., min. div. .20, 10-1/4" scale. 1-2 Weeks $1,290.00 Order
421-5
Ships: 1-2 Weeks
Price: $908.00
Inclined/vertical manometer, inclined range: 0-1.0" w.c., .01 min. div., 6-1/2" scale; vertical range 1.1-5" w.c., min. div. .10, 4-5/8" scale. 1-2 Weeks $908.00 Order
424-10
Ships: 1-2 Weeks
Price: $1,810.00
Inclined/vertical manometer, inclined range: 0-2.0" w.c., .01 min. div., 20" scale; vertical range 2.1-10" w.c., min. div. .10, 9" scale. 1-2 Weeks $1,810.00 Order
424-5
Ships: 1-2 Weeks
Price: $1,482.00
Inclined/vertical manometer, inclined range: 0-2.0" w.c., .01 min. div., 20" scale; vertical range 2.1-5" w.c., min. div. .10, 3-1/4" scale. 1-2 Weeks $1,482.00 Order

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Features

  • 1-1/4" THICK ACRYLIC PLASTIC BODY is a solid block, virtually unbreakable, stable and absolutely free of the danger of distortion.
  • 3/16" BORES, ACCURATE TO ± .0002" are permanently free of bends or crooks, will not require recalibration because of distortion.
  • GROUND GLASS BUBBLE LEVEL sensitive to 115-125 sec./2 MM. is 1-1/2" long x .375" diameter and provided with two red lines for easy visibility and alignment.
  • PARALLAX-FREE READING for maximum accuracy and consistency is achieved by simply aligning the meniscus with its image reflected in the polished aluminum scale.
  • SELECTED GAGE FLUID with high wetability characteristics forms a consistent, well shaped meniscus for perfect readability.
  • O-RING SEALED FLUID LEVEL PLUNGER ADJUSTMENT for easy zeroing.
  • PRECISION BUILT to assure device meets the highest standards.

Accessories

Model Number Description Usually Ships Price Order
1 oz dispenser bottle of red gage fluid, .826 sp. gr. A-101 1 oz dispenser bottle of red gage fluid, .826 sp. gr. Next Day $7.30 Order
4 oz bottle of red gage fluid, .826 sp. gr. A-102 4 oz bottle of red gage fluid, .826 sp. gr. Next Day $14.00 Order
1 pt bottle of red gage fluid, .826 sp. gr. A-103 1 pt bottle of red gage fluid, .826 sp. gr. Next Day $32.25 Order
1 qt bottle of red gage fluid, .826 sp. gr. A-104 1 qt bottle of red gage fluid, .826 sp. gr. Next Day $60.50 Order
1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. A-110 1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. Next Day $137.00 Order
1 pt bottle of blue gage fluid, 1.910 sp. gr. A-111 1 pt bottle of blue gage fluid, 1.910 sp. gr. Consult Factory $1,797.00 Order
Gage connector, shutoff type, for 3/16 A-315 Gage connector, shutoff type, for 3/16" rubber tubing. Next Day $13.75 Order
Adapter, brass, 1/8 A-339 Adapter, brass, 1/8" NPT to 3/16" rubber and 1/8" ID plastic tubing. Next Day $4.00 Order
Clear flexible vinyl tubing is easily inspected, and is therefore best for test
applications where a possibility of fluid entering the tubing exists. 3/16 A-220 Clear flexible vinyl tubing is easily inspected, and is therefore best for test applications where a possibility of fluid entering the tubing exists. 3/16" ID x 5/16" OD, lengths to 500'; 45 psi maximum pressure @ 73°F. Next Day $0.25 Order

Model Chart

SERIES 421
EXAMPLE 421 5 B Series 421-5-B Durablock® Inclined-Vertical Manometer, single column, 6-1/2" inclined scale, range 0-1" w.c. inclined and 1-5" w.c. vertical, with type B connections.
SERIES 421     Single Column, 6-1/2" Inclined Scale
RANGE   5
10
23
130MM
250MM
58CM
  0-1" w.c. Inclined and 1-5" w.c. Vertical
0-1" w.c. Inclined and 1-10" w.c. Vertical
0-2" w.c. Inclined and 2-23" w.c. Vertical
0-25 mm w.c. Inclined and 30-130 mm w.c. Vertical
0-25 mm w.c. Inclined and 30-250 mm w.c. Vertical
0-5.5 cm w.c. Inclined and 7-58 cm w.c. Vertical
OPTIONS     B
C
D
E
AT
NIST
Type B Connections
Type C Connections
Type D Connections
Type E Connections
Aluminum Tag
NIST Certificate of Calibration


SERIES 422
EXAMPLE 422 10 AT Series 422-10-AT Durablock® Inclined-Vertical Manometer, double column, 6-1/2" inclined scale, range 0-1" w.c. inclined and 1-10" w.c. vertical, with aluminum tag.
SERIES 422     Double Column, 6-1/2" Inclined Scale
RANGE   5
10
23
130MM
250MM
58CM
  0-1" w.c. Inclined and 1-5" w.c. Vertical
0-1" w.c. Inclined and 1-10" w.c. Vertical
0-2" w.c. Inclined and 2-23" w.c. Vertical
0-25 mm w.c. Inclined and 30-130 mm w.c. Vertical
0-25 mm w.c. Inclined and 30-250 mm w.c. Vertical
0-5.5 cm w.c. Inclined and 7-58 cm w.c. Vertical
OPTIONS     B
C
D
E
AT
NIST
Type B Connections
Type C Connections
Type D Connections
Type E Connections
Aluminum Tag
NIST Certificate of Calibration


SERIES 424
EXAMPLE 424 132MM NIST Series 424-132MM-NIST Durablock® Inclined-Vertical Manometer, single column, 20" inclined scale, range 0-50 mm w.c. inclined and 52-132 mm w.c. vertical, with NIST certificate of calibration.
SERIES 424     Single Column, 20" Inclined Scale
RANGE   5
10
132MM
250MM
  0-2" w.c. Inclined and 2-5" w.c. Vertical
0-2" w.c. Inclined and 2-10" w.c. Vertical
0-50 mm w.c. Inclined and 52-132 mm w.c. Vertical
0-50 mm w.c. Inclined and 52-250 cm w.c. Vertical
OPTIONS     B
C
D
E
AT
NIST
Type B Connections
Type C Connections
Type D Connections
Type E Connections
Aluminum Tag
NIST Certificate of Calibration

Drawings

Questions

Question
What are the principle advantages of red gage fluid over water for use in manometers?
Answer
Red gage fluid is slow to evaporate, won't freeze, is more readable and produces slightly expanded scales for better reading resolution.
Question
Is routine maintenance required for a Dwyer red gage fluid type manometer?
Answer
Yes. The zero point should be checked periodically as well as the fluid level. After a year of service, particularly with dirty air, the fluid should be replaced to assure that specific gravity changes are not affecting the accuracy of the reading.
Question
What is the advantage of using a manometer rather than a Magnehelic® gage?
Answer
Dwyer Instruments manufactures many different types and styles of manometers with various accuracies and prices for different applications as well as the Magnehelic® gage. For example, some of the many manometers we manufacture are Hook Gage Manometers with ±0.001 inches water column accuracy; Microtector® Portable Electronic Point Gage to ±0.00025 inches water column accuracy; Handheld Digital Manometers with ±0.5 inches water column accuracy; very inexpensive Mark II Molded Plastic Air Filter Gages at ±3% inches water column accuracy. The key point is that we offer many manometers and the selection depends on your specification, application, convenience needs and pocketbook. Some of the key factors to consider that affect manometer performance and usage are: Characteristics of Indicating Fluid, Readability and Leveling. You should read "Measurement of Pressure with the Manometer" in our catalog to fully understand the importance of these factors and their effect on your reading with the manometer instrument. For many applications people prefer to use our Magnehelic® (dial style) gage with ±2% inches of water column accuracy because of convenience, accuracy, etc., plus when compared to a manometer, it eliminates indicating fluid, need for leveling, and some prefer the readability. If you consider manometers and Magnehelic® gages to measure low air or gas pressures ­ positive, negative, or differential, you have a wide selection to choose from and your application needs can be met with our very broad product line at a great value.

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