Designed to measure air velocity, static pressure, vacuum or differential pressure, where the additional range of the 400 Series gages is not required. Series 100 Gages offer superb accuracy combined with portability. In Dwyer's Durablock® precision machined solid acrylic plastic construction, the wells and inclined bore are machined to tolerances of ±.0002".

Design and service features:
Plastic Body - A 1" thick solid acrylic block, virtually unbreakable. It is stable and free of the danger of distortion.

Drilled Bore - Permanently free of bends - never requires recalibration due to distortion.

Reflective Chrome Finish Scales - Easily eliminates parallax errors in reading. Adjustable, with thumbscrew locking for easy zeroing. (Model 125 AV uses screw plunger to adjust zero setting).

Red Gage Oil - .826 specific gravity. Forms a well-shaped, easy-to-read meniscus - the result of high wetability.

Leveling Adjustment - Screw allows quick, accurate leveling. Integral ground glass bubble level provides ready reference.

Complete Air Velocity Kits Include:
Dwyer Inclined Manometer described below, stainless steel Pitot tube (12" with Models 102 AV & 115 AV, 24" with Model 125 AV), two 9' lengths of rubber tubing with connectors, additional red gage oil, instruction card H-7, Bulletin H-11 and magnetic mounting clips, air velocity calculator slide rule and carrying case, (plastic with models 102 and 115, steel with model 125).

Standard Equipment for Dwyer Solid Plastic Portable Manometers

Magneclips for Instant Mounting on Any Steel Surface - These mounting magnets are supplied as part of each Dwyer Durablock® solid plastic portable gage. Just touch magnets to any vertical steel surface - gage “stays put” until manually detached.

Molded Nylon Rapid Shut-Off Tubing Connectors - An exclusive Dwyer feature. Leakproof, corrosion-proof, virtually unbreakable. Requires just one turn to open or close. O-rings prevent leaks and provide positive shut-off. Body is easily removed to add fluid or to clean.

Dwyer Air Velocity Calculator - Slide rule easily calculates air velocity and compensates for temperature and pressure variations. Shows velocity pressure from .01" to 10" water column, velocities from 400 to 20,000 f.p.m., etc. Furnished as a standard accessory with all Dwyer Durablock® solid plastic air velocity gages.

Foam-Lined Carrying Cases - Most Dwyer portable air velocity gages are furnished with cases of high density polyethylene. Model No. 125-AV has a steel case. Cases have a resilient polyurethane plastic foam lining to protect and cushion gage and accessories.

Construction and installation features:
Construction is simple with virtually indestructible molded white styrene-acrylonitrile housing, indicating tube and fluid wells, molded ABS knobs and zero adjust plunger, shock mounted glass level vial and leak proof "O" ring seals. Scales are lithograph printed on aluminum and epoxy coated.
For stationary applications, the Mark II air velocity meters can be easily mounted on any vertical surface with the two screws provided. A built in spirit level simplifies leveling.
Just fill the reservoir, adjust fluid level to zero, connect the pitot tube, and it is ready for operation. For portable applications, the Model A-612 portable stand is available for Models 27 and 28.
A molded plastic swing-out stand and leveling screw for user installation are provided with Models 40-1-AV and 41-2-AV which also feature rapid shutoff tubing connectors and built-in over pressure traps.
Additional standard accessories include plastic connection tubing, mounting screws, ¾ oz. Bottle of indicating fluid and instructions. Metric ranges are also available.

OEM Specials - All models of the Dwyer Mark II molded plastic air velocity meters can be supplied with your logo or special scale in OEM quantities. Consult factory for details.

POPULAR MODELS

Model Number	Range	Price
Mark II 27	0-7,000 fpm	$31.50
Mark II 28	0-10,500 fpm	$58.00
Mark II 40-1-AV	0-4,200 fpm	$47.25
Mark II 41-2-AV	0-6,300 fpm	$71.00
Mark II 40-250PA-AV	0-21 mps	$47.25

Use with Pitot tube for air velocity measurement or without for pressure measurement. Easy and quick to use, Portable Magnehelic Gages with dual scale are less sensitive to level than liquid gages, yet offer accuracy to ±2% over the full scale.† Air Velocity Scale provides direct reading for standard air without conversions. They are handy to use on a ladder or in confined locations encountered in field testing. Dwyer magnetic linkage provides exceptionally responsive, consistently accurate indication of air velocity, positive, negative or differential pressures in air and non-corrosive gases. Pointer movement is inertia-free and drift-free. Highly resistant to shock and vibration.

† 2000-00 - ±4% accuracy; 2000-0 - ±3% accuracy

Dwyer Flow Sensors are averaging pitot tubes that provide accurate and convenient flow rate sensing for schedule 40 pipe. When purchased with a Dwyer Capsuhelic® differential pressure gage of appropriate range, the result is a flow indicating system delivered off the shelf at an economical price.

Pitot tubes have been used in flow measurement for years. Conventional pitot tubes sense velocity pressure at only one point in the flowing stream. Therefore, a series of measurements must be taken across the stream to obtain a meaningful average flow rate. The Dwyer flow sensor eliminates the need for "traversing" the flowing stream because of its multiple sensing points and built-in averaging capability.

Series DS-200 models are available in ten insertion lengths from 1" - 10". Operation is similar to DS-300 units. Basic differences are the multi-turn shut-off valves, 3/8" NPT mounting and installed ¼" SAE 45° flared pressure connections.

Dwyer Series DS-300 flow sensors are designed to be inserted in the pipeline through a compression fitting. They are furnished with instrument shut-off valves on both pressure connections. Valves are fitted with 1/8" female NPT connections. Accessories include adapters with ¼" SAE 45° flared ends compatible with hoses supplied with the Model A-471 Portable Capsuhelic® kit. Standard valves are rated at 200 psig (13.7 bar) and 200°F (93.3°C). Where valves are not required, they can be omitted at reduced cost. Series DS-300 flow sensors are available for pipe sizes from 1" to 10". If replacing a DS-200 flow sensor or using an A-160 thredolet with a DS-300, an optional ¼" x 3/8" bushing, P/N A-161 is required.

DS-400 Averaging Flow Sensors are quality constructed from extra strong ¾" dia. stainless steel to resist increased forces encountered at higher flow rates with both air and water. This extra strength also allows them to be made in longer insertion lengths up to 24 inches (61 cm). All models include convenient and quick-acting quarter-turn ball valves to isolate the sensor for zeroing. Process connections to the valve assembly are 1/8" female NPT. A pair of 1/8" NPT x ¼" SAE 45° flared adapters are included, compatible with hoses used in the Model A-471 Portable Capsuhelic® Gage Kit. Supplied solid brass mounting adapter has a ¾" dia. compression fitting to lock in required insertion length and a ¾" male NPT thread for mounting in a thred-o-let (not included).

The Dwyer 480 Vaneometer™ Swing Vane Anemometer is a durable low-priced instrument specifically designed to simplify the measurement of low air velocities from 25 to 400 feet per minute. OSHA, EPA and other safety ventilation requirements for spray booths and at fume, smoke and dust exhaust hoods can now be quickly checked, even by untrained personnel. Its small size and light weight - only four ounces make it ideal to carry from one work station to another. A versatile steel mounting bracket for continuous monitoring is also included. The Vaneometer Swing Anemometer is accurate to ±5% of full scale to 100 FPM and ±10% from 100 FPM to top of scale. It has a spirit level to insure accurate readings and the large scales are easy to read and visible from both sides. The housing is molded from tough ABS plastic and easy to clean with soap and water. The polyester vane can be cleaned with lacquer thinner. A spare vane is provided.

POPULAR MODELS

Model Number	Description	Price
480	Vaneometer, 25-400 fpm	$23.00
M480	Vaneometer, 0-2.0 m/s	$24.25

ACCESSORIES

Model Number	Description	Price
A-390	Extra vanes, pkg. Of 2	$5.80
A-406	Molded carrying case	$41.00
A-407	Plastic carrying pouch	$5.00

Service Manual
Catalog Page

Use a Vaneometer to measure velocity of air flow into laboratory fume hoods and at paint spray booths to determine when to change filters. Or wherever needed to meet OSHA standards of ventilation for smoke, dust or fume removal.

* U.S. Patent No. 4,154,101

Simple and quick, the No. 460 Air Meter is popular for servicing air conditioning, heating and ventilating equipment. Direct reading velocity and static pressure scales - both low and high ranges - show supply and return grille velocities, furnace draft, pressure drop across filters, etc. The 460 gives consistent, accurate results with no tedious calibration. Rugged plastic for rough daily use. Dual velocity ranges read 260-1200 and 1000-4000 fpm; pressure ranges from .005-.09 and .05-1.0 inches w.c.

POPULAR MODELS

Model Number	Description	Price
460	Air Meter, Complete Kit	$24.25

ACCESSORIES

Model Number	Description	Price
A-378	Tube of 3 replacement floats	$5.50
A-379	Supply grill probe	$3.90
A-380	Return grill probe	$4.50
A-381	Cleaning kit including 3 anti static chemically treated pipe stem cleaners and nylon high range office cleaner	$2.10

A COMPLETE POCKET-SIZE KIT
Includes air meter, return and supply grille probes, angle connector, cleaning materials, instruction card, air velocity calculator, carrying case and one extra plastic ball in plastic tube (not shown).

Model 660 Air Velocity Monitors are a practical, affordable way to continuously monitor for safe airflows through laboratory fume hoods. They are typically installed in the fume hood side fascia and connected to the interior sidewall via 1-1/2" flexible tubing. As the exhaust fan draws air through the device, a sensitive constant temperature thermistor measures flow and lights a green (normal), yellow (high) or red (low) LED. An audible alarm also warns of low flow and requires manual resetting. Mounting holes fit standard single gang electrical box.

POPULAR MODELS

Model Number	Description	Price
660	Air Velocity Monitor	$177.50

ACCESSORIES

Model Number	Description	Price
A-150	AVM Accessory Kit; 3 ft. 1 1/2" flexible tubing, 90 degree bulkhead fitting and (2) nylon tie wraps	$24.50
A-699	Transformer, 120 VAC input, 24 VAC output	$19.00

SPECIFICATIONS
High Setpoint Range: 0-275 FPM (0-1.397 m/s).
Low Setpoint Range: 0-150 FPM (0-.792 m/s).
Repeatability: ±7% of full span, 0-50 and 150-275 FPM; ±5% of full span, 50-150 FPM.
Compensated Temperature Range: 50-90°F (10-32.2°C).
Operating Temperature Range: 32-120°F (0-48.9°C).
Compatability: Air and non-combustible, non-corrosive gases.
Power Supply: 24 VAC, 3 watts maximum.
Response Time: 6-10 seconds.
Warm-Up Time: 3-5 minutes (no flow).
Audible Alarm: 75 dB between 3-10 feet.
Weight: 3 ounces (85 grams).
Mounting Hardware: (2) #6 x 1" sheet metal screws, (2) 6-32 x 7/8" machine screws.

Phone: 813-971-5001
Fax : 813-971-5117

Omni Controls Inc.
5309 Technology Dr.
Tampa, FL 33647

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