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Series 420 Durablock® Inclined/Vertical Manometer

Accuracy to ±0.25%

Dwyer® Series 420 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.

NIST CALIBRATION available in Product Configurator.

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
Starting at $1,274.00
Filter By
Grouped product items
Model Description Availability* Qty Price
421-5 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*
$1,274.00
421-10 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*
$1,391.00
421-23 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*
$1,806.00
422-5 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*
$1,395.00
422-10 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*
$1,652.00
422-23 Inclined/vertical manometer, inclined range: 0-2.2" w.c., .02 min. div., 6-1/8" scale; vertical range 2.4-23.0" w.c., min. div. .20, 10-1/4" scale. 1-2 Weeks*
$2,151.00
424-5 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*
$2,075.00
424-10 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*
$2,534.00

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.

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

Questions

Question
What are the principle advantages of red gage fluid over water for use in manometers?
Answer
Red gage fluid slowly evaporates and will not freeze above -40F°. It 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.
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Model Description Availability* Price
A-101 1 oz dispenser bottle of red gage fluid, .826 sp. gr. 1-3 days*
$10.25
A-102 4 oz bottle of red gage fluid, .826 sp. gr. 1-3 days*
$20.00
A-103 1 pt bottle of red gage fluid, .826 sp. gr. 1-3 days*
$44.50
A-104 1 qt bottle of red gage fluid, .826 sp. gr. 1-3 days*
$83.50
A-110 1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. 1-3 days*
$190.00
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. 1-3 days*
$0.01
A-315 Gage connector, shutoff type, for 3/16" rubber tubing. 1-3 days*
$17.50
A-339 Adapter, brass, 1/8" NPT to 3/16" rubber and 1/8" ID plastic tubing. 1-3 days*
$5.10