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Durablock® Inclined-Vertical ManometersSeries 424- 420

Dwr No. 424 inclined-vyeertical 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.

FEATURES OF THE MODEL 424
  • 1 ¼" 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 ½" long x .375" diameter and provided with two red lines for easy visibility and alignment.
  • SELECTED GAGE OIL with high wetability characteristics forms a consistent, well shaped meniscus for perfect readability.
  • O-RING SEALED FLUID LEVEL PLUNGER ADJUSTMENT for easy zeroing.
Series 424 - Accuracy to ±¼ of 1%
Fig. 8-1. No. 424-10 Inclined-Vertical Manometer, 0-10" water range. The inset shows a segment of the inclined scale in actual size. No. 424-5, 0-5" water range is similar.
 
Series 420 - Inclined-Vertical Manometers Accurate to ±1%
98-26p-img-02Fig. 8-2. Typical of Series 420 Inclined-Vertical Manometers is this No. 422-10 double column manometer with a total range of 0 to 10" of water. Single column models are also furnished. Design features are essentially the same as for the Series 424. They are accurate to ±1% and are particularly suited for use with pitot tubes and in flow measurement or similar applications.
RANGES AND DIMENSIONS Suitable for total pressure up to 100 psig, temperatures up to 150°F. 420

HIGH DENSITY POLYETHYLENE FOAM LINED CARRYING CASES

98-26p-img-03
Model
No.
 Inclined
Ranges
Inches
of Water
 Inclined
Minor
Div.
 Length
of
Inclined
Scale
 Vertical
Range
Inches
of Water
 Vertical
Minor
Div.
 Length
of
Vertical
Scale
 Dimensions
 Weight
lbs.-oz.
A
 B
 C
 D
 E
 F
 G
424-5
424-10
 0-2.0
0-2.0
 .01
.01
 20"
20"
2.1-5
2.1-10
 .10
.10
 3 ¼"
9"
10 ½"
16 ½"
 25 ¼"
25 ¼"
 12 5/8"
12 5/8"
 1"
1"
10 ½"
10 ½"
 5 3/8"
5 3/8"
10"
16"
 14-8
22-12
421-5
421-10
421-23
 0-1.0
0-1.0
0-2.2
 .01
.01
.02
 6 ½"
6 ½"
6 1/8"
1.1-5
1.1-10
2.4-23.0
 .10
.10
.20
 4 5/8"
10 1/8"
10 ¼"
 9 7/8"
15 ½"
15 ½"
 9 5/8"
9 5/8"
9 5/8"
 4 7/8"
4 7/8"
4 7/8"
 5/8"
5/8"
5/8"
6 ½"
6 ½"
6 ½"
 3 ¼"
3 ¼"
3 ¼"
 9 7/8"
15 ½"
15 ½"
 4-12
6-10
6-10
422-5
422-10
422-23
 0-1.0
0-1.0
0-2.2
 .01
.01
.02
 6 ½"
6 ½"
6 1/8"
1.1-5
1.1-10
2.4-23.0
 .10
.10
.20
 4 5/8"
10 1/8"
10 ¼"
 10 ½"
16 1/8"
16 1/8"
11 ½"
11 ½"
11 ½"
 5 1/8"
5 1/8"
5 1/8"
5/8"
5/8"
5/8"
6 ½"
6 ½"
6 ½"
 3 ¼"
3 ¼"
3 ¼"
 10 ½"
16 1/8"
16 1/8"
 6-10
10-13
10-12
*424-250MM
 0-50MM
 .2MM
 19 5/8"
52-250MM
 2.0MM
 8 7/8"
16 ½"
 25 ¼"
 12 5/8"
 1"
10 ½"
 5 3/8"
 16"
 22-12

* Single column metric-ranges and divisions in millimeters.

STANDARD ACCESSORIES:

Includes two ¾ oz. bottles of .826 red gage oil (1.91 blue gage oil for models 421-23 and 422-23), rapid shut-off type "a" connections, two 3 ft. lengths of clear plastic tubing and two 1/8" NPT tubing adapters - two sets for double column models.

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