Distributing Dwyer Instruments

Dwyer 477-FM Portable Digital Manometers
Intrinsically Safe PDM
Differential Pressure and Velocity Meters

CE and FM Mark Symbols

Dwyer Series 477-FM Intrinsically Safe Portable Digital Micromanometers - PDM -

The Dwyer Series 477-FM Digital Manometers
Intrinsically Safe with ±0.5% Accuracy

The Series 477-FM portable digital micromanometers (PDM) are packed with features you need to make low pressure measurement and recording faster, easier and more accurate than ever. You can instantly select from up to nine of the most widely used pressure units without having to waste time and risk mistakes with tedious conversions.

Dwyer 477-FM PDM Features:

11 models with several basic ranges from 0-20" H2O up to 0-150 psid
Large easy-to-read 0.4" LCD display
Includes switchable backlight for great visibility
9 switchable pressure units: psid, inch H2O, mm H2O, inch Hg, mmHg, kPa, Pa, bar, mbar
Measures Positive, Negative or Differential Pressures
Electronic zeroing
±0.5 % full-scale value
Display HOLD key freezes pressure readings for ease of use
Stores 40 readings in memory
Includes + and - indicators plus low battery warning
Both audible and visual overpressure alarms
Operates up to 100 hours on a single 9 volt battery
FM approved Intrinsically Safe for Hazardous Locations, Class 1, Div. 1, Group A, B, C, D, T4
USB option (non-IS) includes cable and software for easy data downloading

Dwyer 477-FM PDM Applications:

Measurement of system pressures in heating, ventilation and air conditioning (HVAC) systems
Perfect for HVAC technicians performing Pitot tube traverses of airflow readings across a duct
Monitoring differential pressure across filters and coils in HVAC systems
Measuring positive and negative pressure in air conditioning ducts
Measuring differential pressure for clean room monitoring

Dwyer 477-FM Manometer Models
Kits include: meter, battery and calibration certificate	Maximum Pressure	Part #	Pricing $US
Range: 0-1.0 in H2O, 0-0.249 kPa	5 psi (0.75 bar)	477-000-FM**	346.00
Range: 0-4.0 in H2O, 0-0.996 kPa	5 psi (0.75 bar)	477-00-FM**	325.00
Range: 0-10 in H2O, 0-2.491 kPa	5 psi (0.75 bar)	477-0-FM**	325.00
Range: 0-20 in H2O, 0-5 kPa	10 psi (0.75 bar)	477-1-FM	325.00
Range: 0-40 in H2O, 0-10 kPa	10 psi (0.75 bar)	477-2-FM	270.00
Range: 0-200 in H2O, 0-50 kPa	30 psi (1.99 bar)	477-3-FM	270.00
Range: 0-10 psi, 0-70 kPa	30 psi (3.99 bar)	477-4-FM	270.00
Range: 0-20 psi, 0-200 kPa	60 psi (3.99 bar)	477-5-FM	270.00
Range: 0-30 psi, 0-700 kPa	60 psi (10.3 bar)	477-6-FM	270.00
Range: 0-100 psi, 0-1000 kPa	150 psi (10.3 bar)	477-7-FM	270.00
Range: 0-150 psi, 0-1000 kPa	200 psi (10.3 bar)	477-8-FM	270.00
Optional: Soft nylon carrying case (7-1/2" x 3" x 2-1/4")		A-402A	41.75
** 2-3 week lead time

Model 477-1T-FM-AV - Air Velocity Kit $594.00
Kit Includes:	* Model 477-1 Digital Manometer * Model 166T, 36" telescoping stainless steel Pitot Tube (Adjustable from 11.5" to 36") * (2) No. A-303 static pressure tips with magnetic mounting * (2) 4-1/2 ft. lengths 3/16" ID rubber tubing * No. A-397 step drill for 3/16"-1/2" holes in 1/16" increments * No. A-532 AV Slide Chart * 9 volt battery * Fitted Polyethylene Case * Normally stocked
Dwyer Model 477-1T-FM-AV Air Velocity Kit
Note: October 2012 pricing subject to change without notice

Dwyer 477-FM Manometer Technical Data
Display	0.42" (10.6 mm) 4-digit LCD
Accuracy	±0.5% F.S., 60 to 78°F (15.6 to 25.6°C); ±1.5% F.S. from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C)
Ranges	See instrument lising in above table
Pressure Hysteresis	±0.1% of full scale
Response Time	1 second
Measuring medium	Air and compatible gases
Temperature Limits	0 to 140°F (-17.8 to 60°C)
Compensated Temperature Limits	32 to 104°F (-0 to 40°C)
Storage temperature limits	-4 to 176°F (-20 to 80°C)
Battery type	9 volt
Battery life	100 hours
Auto Off	Display: 20 minutes / Backlight: 2 minutes
Dimensions L x W x H
Weight	10.2 oz (289 g)
Connections	Two barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing. (Two compression fittings for use with 1/8" (3.18 mm) I.D. x 1/4" (6.35 mm) O.D. tubing for 477-7-FM & 477-8-FM only)
Agency Approvals	CE FM Approved Intrinsically Safe for Hazardous Locations, Class 1, Div. 1, Group A, B, C, D, T4 Note: USB models are not FM approved intrinsically safe

Dwyer 477-FM Manometer Model Description with Pressure Units Table

Dwyer 477-FM Manometer Accessory List
Part Number	Description	$US Pricing
A-402A	Nylon carrying pouch 7-1/2" x 3" x 2-1/4".	41.75
166T	The Model 166T Telescoping Pitot tube is a unique air flow sensor which can quickly and easily be adjusted for any duct insertion length from 11.5 to 36 inches (29.2 to 91.4 cm). Now, this single compact unit can replace up to five conventional fixed length Pitot tubes. For even greater convenience, it is securely protected by a custom fitted polyethylene carrying case. Telescoping sections lock in place as they are extended, enabling use of the handle grip to gauge proper alignment of the tip within the airstream. Stainless steel construction resists corrosion. Hemispherical tip has 1.0 flow coefficient, is 1/8" dia. (3.2 mm). Largest section is 3/8" (9.5 mm). Weight (with case) 1 lb, 9 oz (709 g). Case: 12.5 x 6.25 x 1.75 in.	155.00
160-8	Pitot tube, 5/16" dia., 8-5/8" insertion length. stainless steel	56.50
160-12	Pitot tube, 5/16" dia., 12-5/8" insertion length. stainless steel	58.00
160-18	Pitot tube, 5/16" dia., 18-5/8" insertion length. stainless steel	62.50
160-24	Pitot tube, 5/16" dia., 24-5/8" insertion length. stainless steel	65.00
160-36	Pitot tube, 5/16" dia., 36-5/8" insertion length. stainless steel	81.00
160-48	Pitot tube, 5/16" dia., 48-5/8" insertion length. stainless steel	82.50
160-60	Pitot tube, 5/16" dia., 60-5/8" insertion length. stainless steel	110.00
A-201	Rubber latex tubing has le tendency to kink in storage & occupies less space, thus is best for portable work, 3/16" ID, 9 ft length.	7.15
A-202	Rubber latex tubing, 3/16" ID, lengths to 50 ft, per ft.	0.81 per ft
Series 160S type "S" pitot tubes designed specifically for flow measurement of dirty, particulate laden air or gas streams typical in smoke stack and other environmental testing are also available. Large 5/16" dia. Stainless steel tubing resists plugging under harsh, sooty conditions which quickly block conventional flow sensors. Total and static pressure tubes are precisely aligned and welded together every six inches for maximum accuracy, strength and long term durability. Versatile 1/8" female NPT connections easily adapt to any type of pipe or tubing. A pair of 1/8" NPT to 3/16" I.D. tubing adapters is included plus a handy molded vinyl cap to protect tip when not in use. Available in 18, 24, 36, 48, 60 and 72" lengths. Pricing ranges from $165.00 to $223.00.
Pricing effective October 2012, subject to change without notice

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