Dwyer Series 475 Intrinsically Safe Handheld Digital Manometer

Mike — Fri, 25 Sep 2020 23:34:25 +0000

The Dwyer Series 475 Handheld Digital Manometers measure positive, negative, or differential pressures of air and natural gases in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar).

The dual push pads on the front panel control the on/off, auto zero, and pressure unit selection, allowing for simple operation with no set up needed.

When used with a Dwyer® Pitot tube, the Series 475 can also be used as an air velocity gage.

Dwyer Series 475 Features

Rugged aluminum case protects instrument from damage during transport/use
Large, easy to read LCD and simple operation
FM approved to be intrinsically safe in hazardous locations, Class 1, Div 2, Groups A, B, C, D, T4 Ta = 70°C

Dwyer Series 475 Applications

Monitoring natural gas pressures on boilers and other combustion equipment
Air velocity monitoring, when used with a Dwyer® Pitot tube and AV calculator
Field calibration of other instruments
Monitoring or troubleshooting HVAC systems

Dwyer Series 475 Specification

Service:	Air and compatible combustible gases.
Wetted Materials:	Consult factory.
Accuracy:	±0.5% Full Scale, 15.6 to 25.6°C; ±1.5% Full Scale from 0 to 15.6°C and 25.6 to 40°C.
Pressure Hysteresis:	±0.1% of Full Scale.
Pressure Limits:	See Model Chart below
Temperature Limits:	17.8 to 60°C.
Compensated Temperature Limits:	0 to 40°C.
Storage Temperature Limits:	20 to 80°C.
Display:	10.6 mm 4-digit LCD.
Resolution:	See Model Chart below
Power Requirements:	9 V alkaline battery, installed non-functional, user replaceable.
Weight:	306 g.
Process 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)
Agency Approvals:	CE, FM.

Dwyer Series 475 Ordering Information

Model	Description
475-000-FM	Handheld digital manometer, range 0-1.000″ w.c. (.2491 kPa), max. pressure 5 psig.
475-00-FM	Handheld digital manometer, range 0-4.000″ w.c. (0.996 kPa), max. pressure 5 psig.
475-0-FM	Handheld digital manometer, range 0-10.00″ w.c. (2.491 kPa), max. pressure 5 psig.
475-1-FM	Handheld digital manometer, range 0-20.00″ w.c. (4.982 kPa), max. pressure 10 psig.
475-2-FM	Handheld digital manometer, range 0-40.00″ w.c. (9.96 kPa), max. pressure 10 psig.
475-3-FM	Handheld digital manometer, range 0-200.0″ w.c. (49.82 kPa), max. pressure 30 psig.
475-4-FM	Handheld digital manometer, range 0-10.00 psi (.6895 bar), max. pressure 30 psig.
475-5-FM	Handheld digital manometer, range 0-20.00 psi (1.379 bar), max. pressure 60 psig.
475-6-FM	Handheld digital manometer, range 0-30.00 psi (2.069 bar), max. pressure 60 psig.
475-7-FM	Handheld digital manometer, range 0-100.0 psi (6.895 bar), max. pressure 150 psig.
475-8-FM	Handheld digital manometer, range 0-150.0 psi (10.34 bar), max. pressure 200 psig.

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Dwyer Series 490A Hydronic Differential Pressure Manometer

Mike — Fri, 25 Sep 2020 10:36:56 +0000

The Dwyer Series 490A Hydronic Differential Pressure Manometesr are versatile, hand-held, battery operated manometers available in several basic ranges for positive or positive differential pressure measurement and can tolerate most liquid media compatible with 316LSS.

A memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Standard are a hold feature and both visual and audible overpressure alarms.

A new feature added to the Series 490A is a field adjustable damping, independent viewable high/low pressure readings, and low range increased resolution. This allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications.

A 9V alkaline battery is included that provides up to 100 hours of operation.

Features

Seven user-selectable English and metric units
Stores up to 40 readings for later recall
Backlight for use in dim areas
Digital dampening for low pressure – high resolution logging accuracy
Automatic resolution adjustment for finer control

Dwyer Series 490A Specifications

Service:	Compatible gases & liquids.
Wetted Materials:	Without valve: 316L SS, -3V option: 316LSS, Buna-N, silicone, grease, PTFE, brass 360, copper, reinforced acetal copolymer.
Accuracy:	±0.5% FS, 15.6 to 25.6°C; ±1.5% FS from 0 to 15.6°C and 25.6 to 40°C.
Pressure Hysteresis:	±0.1% FS.
Pressure Limits:	See chart below
Electronic Temperature Limits:	0 to 60°C.
Storage Temperature Limits:	-20 to 80°C.
Display:	10.6 mm 4 digit LCD.
Resolution:	See chart below
Power Requirements:	9 V alkaline battery, installed non-functional, user replaceable.
Process Connections:	Two 1/8″ (3.18 mm) female NPT.
Weight:	400 g.
Agency Approvals:	CE.

Pressure & Resolution Specifications

Series 490A Models Available

Model	Description
490A-1	Wet/Wet handheld digital manometer, 0 to 15 psi (0 to 103.4 kPa)
490A-2	Wet/Wet handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa)
490A-3	Wet/Wet handheld digital manometer, 0 to 50 psi (0 to 344.8 kPa)
490A-4	Wet/Wet handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa)
490A-5	Wet/Wet handheld digital manometer, 0 to 500 psi (0 to 3448 kPa)
490A-6	Wet/Wet handheld digital manometer, 0 to 200 psi (0 to 1379 kPa)

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