Dwyer Instruments
Dwyer Instruments 422-23 Durablock Manometer, Double Column, 0-2 in H2O Inclined / 2-23 in H2O Vertical
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Key specs from the product description
- Type
- Double-column Durablock inclined-vertical manometer (Model 422-23)
- Inclined range
- 0 to 2 in H2O, 6-1/2 in inclined scale
- Vertical range
- 2 to 23 in H2O
- Inclined scale divisions
- Minor divisions to 0.01 in H2O
- Body
- 1-1/4 in thick acrylic plastic solid block
- Bore accuracy
- 3/16 in bores, ±0.0002 in
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Datasheets & manuals
Dwyer Instruments 422-23 Durablock Manometer
Overview
The Series 420 Durablock manometer is built from a 1-1/4 in thick solid block of acrylic plastic that is virtually unbreakable and free of distortion, with 3/16 in bores accurate to ±0.0002 in. A polished aluminum scale gives parallax-free readings, a ground-glass bubble level ensures correct leveling, and an O-ring sealed plunger adjusts the fluid level for easy zeroing.
Model 422-23 is the double-column configuration with a 6-1/2 in inclined scale covering 0-2 in H2O and a vertical section covering 2-23 in H2O. It ships with 1.910 specific gravity blue gage oil as specified for the -23 range models, two 3 ft lengths of clear plastic tubing, rapid shut-off type A connections and two sets of 1/8 in NPT tubing adapters.
Features
- Double-column design with 0-2 in H2O inclined and 2-23 in H2O vertical ranges
- 1-1/4 in thick solid acrylic block body, virtually unbreakable
- 3/16 in precision bores accurate to ±0.0002 in
- Parallax-free polished aluminum scale
- ±0.25% accuracy class per the series data sheet
- Maximum total pressure 100 psig; maximum temperature 150 °F
- 1.910 specific gravity blue gage oil for the -23 range models
- O-ring sealed plunger zero adjustment
Applications
- Air velocity measurement with pitot tubes in ducts
- Static pressure and furnace draft measurement
- Air filter pressure drop and low-differential pressure checks
What's in the Box
- Two 3 ft lengths of clear plastic tubing
- Two rapid shut-off type A gage connections
- Two 1 oz bottles of blue gage oil (1.910 specific gravity)
- Two sets of 1/8 in NPT tubing adapters
Dwyer Instruments 422-23 Durablock Manometer Technical Specifications
| Type | Double-column Durablock inclined-vertical manometer (Model 422-23) |
|---|---|
| Inclined range | 0 to 2 in H2O, 6-1/2 in inclined scale |
| Vertical range | 2 to 23 in H2O |
| Inclined scale divisions | Minor divisions to 0.01 in H2O |
| Body | 1-1/4 in thick acrylic plastic solid block |
| Bore accuracy | 3/16 in bores, ±0.0002 in |
| Accuracy | ±0.25% (series data sheet) |
| Maximum total pressure | 100 psig |
| Operating temperature | Up to 150 °F |
| Process connections | Rapid shut-off type A connectors; 1/8 in NPT tubing adapters |
| Fill fluid | Blue gage oil, 1.910 specific gravity |
| Level | Ground-glass bubble level, 1-1/2 in long x 0.375 in diameter |
Manufacturer information: Series 420 Durablock manometers on dwyeromega.com.
Price $1,131.00 USD as listed on 05 Nov 2026. Request a firm quote: https://na.indomultimeter.net/products/dwyer-instruments-422-23-durablock-manometer-double-column-0-2-in-h2o-inclined-2-23-in-h2o-vertical
Shipping. We ship worldwide. See the shipping policy.
Documents. Instruments ship with calibration documentation traceable to national standards. Some models, such as the Mensor CPG2500, also ship with an A2LA accredited ISO/IEC 17025 certificate.
Warranty. See the warranty policy.
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Instruments ship with calibration documentation traceable to national standards. Ask in your request if you need a specific certificate.
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We ship worldwide. Put your destination country in your enquiry and we confirm delivery with your quote.
What if it arrives defective, damaged or wrong?
You get a 30-day money-back guarantee for items that arrive defective, damaged or wrong. See the refund policy.