Dwyer Manometers

• Measures positive, negative and differential pressures 
• Rugged, lightweight, fast and easy to use 
• Dual calibration with english and metric units 
• Accuracy: ±0.5% of F.S., 60-78°F (15-25°C) 
• Pressure hysteresis: ±0.1% of F.S. 
• Operating temp. range: 32-122°F (0-50°C) 
• Power source: 9 volt alkaline (included) 
• Battery life: typically 100 hours 
• Pressure connections: barbed for 1/8" or 3/16" I.D. tubing (475 only - 1/8" I.D. X 3/16" O.D. tubing) 
• Display: 0.5" liquid crystal 
• Size: 6 9/16"H X 2 13/16"W X 29/32"D 
• Weighs 12 oz with battery 
• 6 ranges available: 0/20" H₂0 to 0/30 psid 

• Instant selection from up to 9 english/metric units 
• Stores 20 readings in memory for later reference 
• Measures positive, negative or differential pressures 
• 0.4" LCD display/switchable backlight 
• Audible and visual overpressure alarms 
• +/- indicators plus low battery warning 
• Accuracy: ±0.5% of F.S., 60-78°F (15-25°C) 
• ±1% of F.S. from 32 to 60, 78 to 104°F (0 to 15, 25 to 40°C) 
• Storage temp: -4 to 176°F (-20 to 80°C) 
• Power source: 9 volt alkaline (included) 
• Size: 6 9/16"H X 2 13/16"W X 29/32"D 
• Battery life: typically 100 hours (less when backlight is used 
• Weighs 12 oz with battery 
• 5 ranges available: 0/20" H₂0 to 0/30 psid

• 1" thick acrylic plastic body 
• Drilled bores accurate to ±.0002" 
• Adjustable reflective polished aluminum scales 
• Parallax-free reading; Leveling adjustment 
• Over-pressure safety traps 
• Heavy gauge steel mounting panels 
• Panel mounted with: level adjustment; an extra bottle of .826 sp. grav. red gauge oil; instructions and one set of type (a) connectors (unless otherwise specified) 
• Connection options: tygon plastic tubing; two 1/8" pipe thread adapters; or one brass terminal tube

  Ordering Info

• Made to roll up compactly for easy carrying 
• Corrosion-proof, leakproof, practically unbreakable 
• Tubes won't bend or pinch off 
• Over-pressure safety traps 
• Reads static pressure, vacuum, or differential pressure 
• Magnetic clips hold it firmly to any steel surface or hang it on a nail 
• Cover pressure readings from 4"-0-4" up to 60"-0-60" 
• Exclusive molded nylon tubing connector assemblies with rapid shutoff design in an acrylic plastic top 
• Tubing connectors extend horizontally, allowing 360° freedom 
• Suitable for intermittent total pressure to 50 PSI and vacuum not exceeding 20" Hg 
• Avoid temperatures above 130°F and continuous high total pressure 
• Not for use with red gauge oil; use only water or mercury 
• Standard Accessories: Metal carrying case; Magnetic mounting clips; Two rapid shutoff type molded nylon rubber tubing connectors; One bottle of fluorescein green color concentrate with wetting agent; Over-pressure safety traps 
• Mercury will be furnished at added cost when specified 
• A wide choice of optional accessories is available 

• 1 1/4" thick acrylic plastic body; 3/16" bores, accurate to ±.0002" 
• Ground glass bubble level 
• Parallax-free reading 
• O-ring sealed fluid level plunger adjustment 
• Panel mounted with: level adjustment; extra bottle of .826 sp. grav. red gauge oil; instructions; one set of type (a) connectors (unless otherwise specified); and over-pressure safety traps 
• Inclined range bore length: 20" 
• Connection Options: two molded nylon tubing connectors, rapid shutoff type (two 3 ft. lengths flexible Tygon plastic tubing, and two 1.8" pipe thread adapters); two molded nylon tubing connectors, rapid shutoff type, one 9' length rubber tubing, and one brass terminal tube; two 1/8" pipe thread openings; two compression fittings for 1/4" O.D. copper or aluminum tubing; 3-way vent valve, 1/8" NPT to 1/4" metal tubing 

• 1" thick acrylic plastic body 
• Drilled bore accurate to ±.0002" 
• Adjustable reflective chrome finish scales 
• Parallax-free reading 
• Screw type leveling adjustment 
• Accessories include: two magnetic mounting clips; two molded nylon tubing connectors (rapid shutoff type unless otherwise specified); an extra bottle of .826 sp. gravity red gauge oil; 9 foot length rubber tubing; metal terminal tube; holder; instructions and carrying case (except 170 series has plastic pouch) 
• Inclined and vertical (well-type) styles available 
• Leak-proof, corrosion-proof, virtually unbreakable molded nylon connector requires just one turn to open or close

• No hidden wells or packing glands 
• Shatter-proof construction 
• Permanently secured to well assemblies 
• Over-pressure safety traps 
• Solid acrylic plastic well assemblies 
• Dead white heavy plastic scales with hot stamped black figures and graduations that will not rub off 
• Suitable for pressures up to 100 PSI 
• Series #1230 Manometers (wall mounting type) have mounting holes for easy installation. They may also be used as portable manometers and can be hung or attached to any vertical steel surface by magnetic mounting clips. All parts are fully visible and readily accessible for cleaning 
• Series #1235 Manometers (panel mounting type) have all pressure connections made from the back with the micrometer zero scale adjustment in front at the base of the liquid column 
• Standard accessories include over-pressure safety traps, one set of (a) connectors 
• Ranges from 0/8" to 0/36" 

• Inexpensive, accurate, and durable 
• Columns easily accessible for cleaning 
• Over-pressure safety traps 
• Full scale ranges from 4"-0-4" of water or 18"-0-18" mercury 
• Suitable for total pressures to 100 PSI 
• Positive, negative, and differential pressures 
• Designed for maximum legibility 
• Accessories include: 3/4 ounce bottle .826 sp. gr. red gauge oil furnished for "D" style manometers; and fluorescein green dye concentrate furnished with "W/M" style manometers

• Contains: One slack-Tube Manometer (reads pressure to 16" water); One plastic carrying case; One 3/4 oz. bottle Fluorescein green color concentrate with wetting agent; Two 1/8" pipe thread rubber tubing adapters; One 1/8" to 1/4" pipe thread bushing; One 3 ft. length 3/16" rubber tubing; and One rubber tubing adapter to fit standard 7/16" dia. spud 
• Different size manometers may be specified as desired at corresponding prices. Compared to the cost of purchasing pieces separately, the assembly of component parts into kit form represents a substantial saving 

• Inclined or inclined-vertical type 
• Above/below atmospheric pressure measurement 
• Economically priced and compact 
• Portable or stationary configurations 
• Rapid shutoff pressure connections and integral over-pressure safety traps (Model 40) 
• Accuracy: ±3% full scale 
• Maximum internal working pressure: 10 PSI (70 KPa) 
• Maximum working temperature: 140°F 
• Virtually indestructible molded white styrene-acrylonitrile housing 
• Leak proof "O" ring seals 
• Included with each Mark II manometer are two tubing connectors for 1/8" pipe or sheet metal ducts, two mounting screws, 3/4 ounce bottle of indicating fluid, red and green pointer flags, and complete instructions 
• The Model 25 also includes 8 feet of flexible double column plastic tubing. Portable operation of the Model 25 is made possible by the use of the optional A-612 portable stand. A short piece of tubing can be slipped over the Model 25 pressure connections to contain the gauge oil in transit 
• The Model 40 contains two 4 1/2 foot lengths of clear plastic tubing, a plastic swing-out stand, and leveling screw for portable operation. It also features convenient rapid shutoff pressure connections and integral over-pressure safety traps