Used in Isolation/ Hospital Environments and Temporary Units (no power required)
Select the Series 2000 Magnehelic® Gage for a versatile low differential pressure gage with a wide choice of 81 models and 27 options to choose from. Using Dwyer’s simple, frictionless Magnehelic® gage movement, it quickly indicates air or noncorrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration, over-pressures and is weatherproof to IP67. Select the -HA High Accuracy Magnehelic® Gage option for an accuracy within 1% of full scale, located below in the Product Configurator. Also included with the –HA option at no extra cost is a mirrored scale overlay and a 6 point calibration certificate.
NIST CALIBRATION available in Product Configurator.
Note: May be used with Hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.
Air and non-combustible, compatible gases (natural gas option available). Note: May be used with hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.
Wetted Materials:
Consult factory.
Housing:
Die cast aluminum case and bezel, with acrylic cover, Exterior finish is coated gray to withstand 168 hour salt spray corrosion test.
Accuracy:
±2% (-HA model ±1) of FS (±3% (-HA ±1.5%) on -0, -100PA, -125PA, -10MM and ±4% (-HA ±2%) on -00, -60PA, -6MM ranges), throughout range at 70°F (21.1°C).
Pressure Limits:
-20 in Hg. to 15 psig.† (-0.677 bar to 1.034 bar); MP option: 35 psig (2.41 bar), HP option: 80 psig (5.52 bar).
Enclosure Rating:
IP67.
Overpressure:
Relief plug opens at approximately 25 psig (1.72 bar), standard gages only. See Overpressure Protection note on Catalog page.
Temperature Limits:
20 to 140°F (-6.67 to 60°C). -20°F (-28°C) with low temperature option.
Size:
4" (101.6 mm) diameter dial face.
Mounting Orientation:
Diaphragm in vertical position. Consult factory for other position orientations.
Process Connections:
1/8" female NPT duplicate high and low pressure taps - one pair side and one pair back.
Weight:
1 lb 2 oz (510 g); MP & HP 2 lb 2 oz (963 g).
Standard Accessories:
Two 1/8" NPT plugs for duplicate pressure taps, two 1/8" pipe thread to rubber tubing adapters and three flush mounting adapters with screws. (Mounting and snap ring retainer substituted for three adapters in MP & HP gage accessories.)
Note: For applications with high cycle rate within gage total pressure rating, next higher rating is recommended. See Medium and High pressure options.
Easy to read gage through undistorted plastic face permits viewing from far away
Patented design provides quick response to pressure changes means no delay in
assessing critical situations
Durable and rugged housing and high-quality components combine to provide longservice
life and minimized down-time
High accuracy option is twice as accurate as the standard Magnehelic® gage.
Bezel provides flange for flush mounting in panel.
Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.
Precision litho-printed scale is accurate and easy to read.
Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.
Pointer stops of molded rubber prevent pointer over-travel without damage.
"Wishbone" assembly provides mounting for helix, helix bearings and pointer shaft.
Jeweled bearings are shock-resistant mounted; provide virtually friction-free motion for helix. Motion damped with high viscosity silicone fluid.
Zero adjustment screw is conveniently located in the plastic cover, and is accessible without removing the cover. O-ring seal provides pressure tightness.
Helix is precision made from an alloy of high magnetic permeability. Mounted in jeweled bearings, it turns freely, following the magnetic field to move the pointer across the scale.
Calibrated range spring is flat spring steel. Small amplitude of motion assures consistency and long life. It reacts to pressure on diaphragm. Live length adjustable for calibration.
Silicone rubber diaphragm with integrally molded O-ring is supported by front and rear plates. It is locked and sealed in position with a sealing plate and retaining ring. Diaphragm motion is restricted to prevent damage due to overpressures.
Die cast aluminum case is precision made and iridite-dipped to withstand 168 hour salt spray corrosion test. Exterior finished in baked dark gray hammerloid. One case size is used for all standard pressure options, and for both surface and flush mounting.
OVERPRESSURE PROTECTION Blowout plug is comprised of a rubber plug on the rear which
functions as a relief valve by unseating and venting the gage
interior when over pressure reaches approximately 25 psig (1.7
bar). To provide a free path for pressure relief, there are four
spacer pads which maintain 0.023" clearance when gage is
surface mounted. Do not obstruct the gap created by these pads.
The blowout plug is not used on models above 180" of water
pressure, medium or high pressure models, or on gages which
require an elastomer other than silicone for the diaphragm.
The blowout plug should not be used as a system overpressure
control. High supply pressures may still cause the gage to fail due
to over pressurization, resulting in property damage or serious
injury. Good engineering practices should be utilized to prevent
your system from exceeding the ratings of any component.
O-ring seal for cover assures pressure integrity of case.
Samarium Cobalt magnet mounted at one end of range spring
rotates helix without mechanical linkages.
Scale Overlays Red, Green, Yellow, Mirrored or Combination,
Specify Locations
Mounting and Orientation A single case size is used for most models of Magnehelic® gages. They can be flush or surface mounted with standard hardware supplied. Standard gages are calibrated in the vertical position, and should be used in that position for maximum stated accuracy. Ranges above 17.5 in w.c. may be used at any angle, and should stay within specified accuracy, by simply re-zeroing. Ranges below 17.5 in w.c. should be ordered using the –TA tilt angle option with the angle specified. These characteristics make Magnehelic® gages ideal for both stationary and portable applications. A 4-9/16" hole is required for flush panel mounting. Complete mounting and connection fittings, plus instructions, are furnished with each instrument.
AHU1 Furnished with attached surface mounting plate
AHU2 Furnished with attached surface mounting plate and including
A-481 installer kit (2 plastic static pressure tips and 7´of
PVC tubing)
CB Chrome bezel option: A chrome plated aluminum bezel for an
aesthetically pleasing finish when mounting on metal surfaces
such as control panels.
05-0-.20" w.c.
0-.25" w.c.
0-.5" w.c.
0-1" w.c.
0-2" w.c.
0-3" w.c.
0-4" w.c.
0-5" w.c.
0-6" w.c.
0-8" w.c.
0-10" w.c.
0-12" w.c.
0-15" w.c.
0-20" w.c.
0-25" w.c.
0-30" w.c.
0-40" w.c.
0-45" w.c.
0-50" w.c.
0-60" w.c.
0-80" w.c.
0-100" w.c.
0-120" w.c.
0-150" w.c.
0-160" w.c.
0-180" w.c.
0-200" w.c.
0-250" w.c.
0-300" w.c.
0-400" w.c.
0-500" w.c.
0.125-0-0.125" w.c.
0.25-0-0.25" w.c.
0.5-0-0.5" w.c.
1-0-1" w.c.
2-0-2" w.c.
2.5-0-2.5" w.c.
3-0-3" w.c.
4-0-4" w.c.
5-0-5" w.c.
6-0-6" w.c.
8-0-8" w.c.
10-0-10" w.c.
15-0-15" w.c.
20-0-20" w.c.
25-0-25" w.c.
30-0-30" w.c.
40-0-40" w.c.
50-0-50" w.c.
75-0-75" w.c.
0-1 ft w.c.
0-1.5 ft w.c.
0-2 ft w.c.
0-2.5 ft w.c.
0-3 ft w.c.
0-4 ft w.c.
0-5 ft w.c.
0-6 ft w.c.
0-8 ft w.c.
0-10 ft w.c.
0-12 ft w.c.
0-12.5 ft w.c.
0-15 ft w.c.
0-20 ft w.c.
0-25 ft w.c.
0-30 ft w.c.
0-35 ft w.c.
0-40 ft w.c.
0-50 ft w.c.
0-60 ft w.c.
0-0.25" w.c. & 0-62 Pa
0-0.5" w.c. & 0-125 Pa
0-1" w.c. & 0-250 Pa
0-2" w.c. & 0-500 Pa
0-3" w.c. & 0-750 Pa
0-4" w.c. & 0-1 kPa
0-5" w.c. & 0-1.25 kPa
0-6" w.c. & 0-1.5 kPa
0-8" w.c. & 0-2 kPa
0-10" w.c. & 0-2.5 kPa
0-15" w.c. & 0-3.7 kPa
0-20" w.c. & 0-5 kPa
0-25" w.c. & 0-5.2 kPa
0-30" w.c. & 0-7.5 kPa
0-40" w.c. & 0-10 kPa
00-50" w.c. & 0-12.4 kPa
0-60" w.c. & 0-15 kPa
0-100" w.c. & 0-25 kPa
0-200" w.c. & 0-50 kPa
5-0-5" w.c. & 1.25-0-1.25 kPa
0-0.25" w.c. & 0-2000 fpm
0-0.5" w.c. & 0-2800 fpm
0-1" w.c. & 0-4000 fpm
0-2" w.c. & 0-5600 fpm
0-5" w.c. & 0-8800 fpm
0-10" w.c. & 0-12500 fpm
0-15" w.c. & 0-15500 fpm
0-20" w.c. & 0-17500 fpm
0-25" w.c. & 0-20000 fpm
0-60 Pa & 0-9.8 m/s
0-125 Pa & 0-14.4 m/s
0-250 Pa & 0-20 m/s
0-500 Pa & 0-28 m/s
0-1.25 kPa & 0-45 m/s
0-2 kPa & 0-57 m/s
0-3.5 kPa & 0-76 m/s
0-5 kPa & 0-90 m/s
0-6 kPa & 0-98 m/s
0-1 psid
0-2 psid
0-3 psid
0-4 psid
0-5 psid
0-6 psid
0-8 psid
0-10 psid
0-15 psid
0-20 psid
0-30 psid
0-.25" Hg
0-.5" Hg
0-1" Hg
0-1.5" Hg
0-2" Hg
0-3" Hg
0-4" Hg
0-5" Hg
0-6" Hg
0-7" Hg
0-8" Hg
0-9" Hg
0-10" Hg
0-11" Hg
0-12" Hg
0-15" Hg
0-16" Hg
0-20" Hg
0-25" Hg
0-30" Hg
0-40" Hg
0-50" Hg
0-60" Hg
0.25-0-0.25" Hg
0.5-0-0.5" Hg
1-0-1" Hg
5-0-5" Hg
15-0-15" Hg
0-0.5 mm Hg
0-1 mm Hg
0-2 mm Hg
0-4 mm Hg
0-5 mm Hg
0-6 mm Hg
0-7 mm Hg
0-8 mm Hg
0-9 mm Hg
0-10 mm Hg
0-11 mm Hg
0-12 mm Hg
0-15 mm Hg
0-20 mm Hg
0-25 mm Hg
0-30 mm Hg
0-35 mm Hg
0-40 mm Hg
0-50 mm Hg
0-60 mm Hg
0-80 mm Hg
0-100 mm Hg
0-150 mm Hg
0-200 mm Hg
0-250 mm Hg
0-300 mm Hg
0-350 mm Hg
0-400 mm Hg
30-0-30 mm Hg
0-6 mm w.c.
0-8 mm w.c.
0-10 mm w.c.
0-12 mm w.c.
0-15 mm w.c.
0-20 mm w.c.
0-25 mm w.c.
0-30 mm w.c.
0-35 mm w.c.
0-40 mm w.c.
0-50 mm w.c.
0-60 mm w.c.
0-75 mm w.c.
0-80 mm w.c.
0-100 mm w.c.
0-125 mm w.c.
0-150 mm w.c.
0-200 mm w.c.
0-250 mm w.c.
0-300 mm w.c.
0-350 mm w.c.
0-375 mm w.c.
0-400 mm w.c.
0-500 mm w.c.
0-600 mm w.c.
0-700 mm w.c.
0-750 mm w.c.
0-800 mm w.c.
0-100 x 10 mm w.c.
0-120 x 10 mm w.c.
0-150 x 10 mm w.c.
0-160 x 10 mm w.c.
0-180 x 10 mm w.c.
0-200 x 10 mm w.c.
0-300 x 10 mm w.c.
0-400 x 10 mm w.c.
0-500 x 10 mm w.c.
3-0-3 mm w.c.
5-0-5 mm w.c.
6-0-6 mm w.c.
7-0-7 mm w.c.
10-0-10 mm w.c.
15-0-15 mm w.c.
20-0-20 mm w.c.
25-0-25 mm w.c.
30-0-30 mm w.c.
40-0-40 mm w.c.
50-0-50 mm w.c.
75-0-75 mm w.c.
80-0-80 mm w.c.
100-0-100 mm w.c.
125-0-125 mm w.c.
150-0-150 mm w.c.
160-0-160 mm w.c.
200-0-200 mm w.c.
225-0-225 mm w.c.
250-0-250 mm w.c.
300-0-300 mm w.c.
350-0-350 mm w.c.
375-0-375 mm w.c.
400-0-400 mm w.c.
500-0-500 mm w.c.
0-1.5 cm w.c.
0-2 cm w.c.
0-2.5 cm w.c.
0-3 cm w.c.
0-4 cm w.c.
0-5 cm w.c.
0-6 cm w.c.
0-8 cm w.c.
0-10 cm w.c.
0-15 cm w.c.
0-20 cm w.c.
0-25 cm w.c.
0-30 cm w.c.
0-35 cm w.c.
0-40 cm w.c.
0-50 cm w.c.
0-60 cm w.c.
0-80 cm w.c.
0-100 cm w.c.
0-125 cm w.c.
0-150 cm w.c.
0-200 cm w.c.
0-250 cm w.c.
0-300 cm w.c.
0-350 cm w.c.
0-400 cm w.c.
0-500 cm w.c.
0-600 cm w.c.
0-700 cm w.c.
0-100 x 10 cm w.c.
1-0-1 cm w.c.
1.5-0-1.5 cm w.c.
2-0-2 cm w.c.
2.5-0-2.5 cm w.c.
5-0-5 cm w.c.
10-0-10 cm w.c.
15-0-15 cm w.c.
20-0-20 cm w.c.
25-0-25 cm w.c.
30-0-30 cm w.c.
40-0-40 cm w.c.
50-0-50 cm w.c.
10-0-50 Pa
0-30 Pa
0-60 Pa
0-100 Pa
0-125 Pa
0-150 Pa
0-200 Pa
0-250 Pa
0-300 Pa
0-350 Pa
0-400 Pa
0-500 Pa
0-700 Pa
0-750 Pa
0-800 Pa
0-1000 Pa
0-100 x 10 Pa
0-1250 Pa
0-125 x 10 Pa
0-1500 Pa
0-150 x 10 Pa
0-2000 Pa
0-200 x 10 Pa
0-2500 Pa
0-250 x 10 Pa
0-3000 Pa
0-300 x 10 Pa
0-4500 Pa
0-450 x 10 Pa
0-5000 Pa
0-500 x 10 Pa
0-6000 Pa
0-600 x 10 Pa
0-8000 Pa
0-800 x 10 Pa
30-0-30 Pa
40-0-40 Pa
50-0-50 Pa
60-0-60 Pa
100-0-100 Pa
125-0-125 Pa
150-0-150 Pa
200-0-200 Pa
250-0-250 Pa
300-0-300 Pa
500-0-500 Pa
600-0-600 Pa
700-0-700 Pa
1000-0-1000 Pa
100-0-100 x 10 Pa
1500-0-1500 Pa
150-0-150 x 10 Pa
2500-0-2500 Pa
250-0-250 x 10 Pa
3000-0-3000 Pa
300-0-300 x 10 Pa
0-0.1 kPa
0-0.2 kPa
0-0.3 kPa
0-0.5 kPa
0-1 kPa
0-1.25 kPa
0-1.5 kPa
0-2 kPa
0-2.5 kPa
0-3 kPa
0-3.5 kPa
0-4 kPa
0-5 kPa
0-6 kPa
0-8 kPa
0-10 kPa
0-12 kPa
0-12.5 kPa
0-15 kPa
0-20 kPa
0-25 kPa
0-30 kPa
0-35 kPa
0-40 kPa
0-50 kPa
0-60 kPa
0-70 kPa
0-75 kPa
0-80 kPa
0-100 kPa
0-140 kPa
0-170 kPa
0-200 kPa
0.2-0-0.2 kPa
0.5-0-0.5 kPa
1-0-1 kPa
1.25-0-1.25 kPa
1.5-0-1.5 kPa
2-0-2 kPa
2.5-0-2.5 kPa
3-0-3 kPa
3.5-0-3.5 kPa
3.75-0-3.75 kPa
4-0-4 kPa
5-0-5 kPa
6-0-6 kPa
8-0-8 kPa
10-0-10 kPa
0-1 Millibar
0-1.5 Millibar
0-2 Millibar
0-2.5 Millibar
0-3 Millibar
0-4 Millibar
0-5 Millibar
0-6 Millibar
0-8 Millibar
0-10 Millibar
0-12 Millibar
0-15 Millibar
0-20 Millibar
0-25 Millibar
0-30 Millibar
0-35 Millibar
0-40 Millibar
0-50 Millibar
0-60 Millibar
0-75 Millibar
0-80 Millibar
0-100 Millibar
0-125 Millibar
0-150 Millibar
0-200 Millibar
0-250 Millibar
0-300 Millibar
0-350 Millibar
0-400 Millibar
0-500 Millibar
0-600 Millibar
0-700 Millibar
0-800 Millibar
0-100 x 10 Millibar
1-0-1 Millibar
1.5-0-1.5 Millibar
2-0-2 Millibar
2.5-0-2.5 Millibar
3-0-3 Millibar
5-0-5 Millibar
10-0-10 Millibar
12-0-12 Millibar
15-0-15 Millibar
20-0-20 Millibar
25-0-25 Millibar
30-0-30 Millibar
35-0-35 Millibar
40-0-40 Millibar
50-0-50 Millibar
250-0-250 Millibar
0-0.5 ounces per square inch
0-1 ounces per square inch
0-2 ounces per square inch
0-3 ounces per square inch
0-4 ounces per square inch
0-6 ounces per square inch
0-8 ounces per square inch
0-10 ounces per square inch
0-15 ounces per square inch
0-16 ounces per square inch
0-20 ounces per square inch
0-30 ounces per square inch
0-32 ounces per square inch
0-40 ounces per square inch
0-50 ounces per square inch
0-80 ounces per square inch
0-100 ounces per square inch
1-0-1 ounces per square inch
0-0.20 bar
0-0.5 bar
0-1 bar
0-1.5 bar
0-2 bar
0-0.5 kg/cm²
0-1 kg/cm²
0-1.5 kg/cm²
0-2 kg/cm²
0-10" w.c. & 0-20 SCFM air (w/1" NPT Tube)
0-10" w.c. & 0-50 SCFM air (w/1.5" NPT Tube)
0-10" w.c. & 0-85 SCFM air (w/2" NPT Tube)
0-10" w.c. & 0-200 SCFM air (w/3" NPT Tube)
0-10" w.c. & 0-350 SCFM air (w/4" NPT Tube)
0-20" w.c. & 0-30 SCFM air (w/1" NPT Tube)
0-20" w.c. & 0-70 SCFM air (w/1.5" NPT Tube)
0-20" w.c. & 0-120 SCFM air (w/2" NPT Tube)
0-20" w.c. & 0-290 SCFM air (w/3" NPT Tube)
0-20" w.c. & 0-500 SCFM air (w/4" NPT Tube)
0-40" w.c. & 0-40 SCFM air (w/1" NPT Tube)
0-40" w.c. & 0-100 SCFM air (w/1.5" NPT Tube)
0-40" w.c. & 0-160 SCFM air (w/2" NPT Tube)
0-40" w.c. & 0-395 SCFM air (w/3" NPT Tube)
0-40" w.c. & 0-675 SCFM air (w/4" NPT Tube)
OPTIONS
ASF
AHU1
AHU2
AT
BUNA
CB
COO
FC
G
HA
HC
HP
IC
LT
M
MP
NIST
R
RM
SB
SF
SPCL
SS
ST
TA
VIT
Y
Adjustable Signal Flag
Mounting Plate Only
Mounting Plate with A-481 Accessory Kit
Aluminum Tag
Buna-N Elastomers
Chrome Bezel
Certificate of Origin
Factory Calibration Certificate
Green Scale Overlay
High Accuracy
Horizontal Calibration (90 Deg Face Up)
High Pressure
Impregnated Case
Low Temperature
Mirror Scale Overlay
Medium Pressure
NIST Traceable Calibration Certificate
Red Scale Overlay
Replacement Mag for Venturi Flow Tubes Only
304 Stainless Steel Bezel
Silicone Free
Special Cleaning
Brushed 304SS Bezel
Stainless Steel Tag
Tilt Angle from Vertical in Degrees
Fluoroelastomers
Yellow Scale Overlay
Can the standard Magnehelic® or Capsuhelic® gage be installed outdoors?
Answer
Yes. Front covers are sealed with "O" rings. Capsuhelic vent holes are plugged with foam, and the new high impact acrylic lens material is very resistant to ultra-violet fogging. Additional care is recommended to lead pressure connections downward from the gage and provide as much protection from the elements as possible
In Bulletin A-27 under operation, it explains how to connect the Magnehelic to the following applications: positive pressure, negative pressure, and differential pressure.
Your Magnehelic gauge doesn't come with a calibration certificate, do you have any documentation for these gauges to meet these needs?
Answer
We have 3 options: (1) We can supply a Certificate of Conformance at no charge if you request that certificate at the time of order. The Certificate of conformance would state that each Magnehelic gauge is calibrated to meet the specifications stated on the spec sheet. (2) We offer a factory calibration “-FC” as an option that is a certificate of the standard calibration points at the time of manufacture, for a small fee. (3) We can also provide a NIST-traceable calibration for an extra charge per gage if that is required. To get the NIST-traceable calibration, you would simply add a “-NIST” to the end of your part number. NIST-traceable calibrations will come with the 6 point calibration certificate.
We recommend “periodic calibration” for our Magnehelic, though we leave the specific time-frame up to the end user, since different organizations have different requirements (i.e. government groups often require more frequent calibrations.) If you choose to have the NIST traceable calibration done, the NIST group (the National Institute of Standards and Technology) dictates yearly calibration and it will be printed on the certificate.
I am looking to measure velocity in a 4" pipe that is used as air conveyance. We use an eductor and a single stage blower to produce air flow. I am looking to measure pressure and velocity. I purchased a Dwyer Pitot tube, 167-7 108024-00 for the job, and I want to match with the right gauge. I need to be in the range of 2600 cuft/min at maybe 0.5psi. Can you direct me to the right gauge with that information?
Answer
To monitor flow through your 4” pipe, you will have to size the appropriate differential pressure gage. A very common gage that is used will be our Series 2000 Magnehelic gage. This gage can be ordered with a square root output that will direct read in flow units. Upon ordering this part, you will have to specify the maximum differential pressure at your desired flow rate. The following text will bring you to the equations necessary to compute this differential (velocity) pressure. This can also be found in the APPLICATION GUIDES section of our website.
I have a Magnehelic gage 2000-00N I purchased for a clean room. Should the installers set the "set" screw to get the gage back to (0) or
will that mess up the calibration? My invoice # if you need to look at what I purchased is 04844623.
Answer
After the Magnehelic has been installed, disconnect pressure
lines to vent both sides of the gage to the atmosphere and re-zero.
This will not mess up the calibration. This should be done occasionally.
How do I hook up my Magnehelic® gage for an air velocity application with a pitot tube?
Answer
In our Application Guides on flow products, we explain very well how to take air velocity readings. The total pressure connection on the pitot tube is connected to one of the high pressure ports on the gage. The other high pressure port is plugged. The static pressure connection on the pitot tube is connected to one of the low pressure ports on the gage. The other low pressure port is plugged.
Yes, the information we require to supply the proper range is the velocity (fpm or m/s) or velocity pressure (inches of water or kpa) and density of air (lb/ft3 or g/cm3).
Why must Dwyer pressure switches be mounted with the diaphragm in the vertical plane?
Answer
In other than a vertical plane, the diaphragm can sag and cause a shift in set-point or a change in the adjustable set-point range. The switch may even fail to reset at the minimum set-points. This is the same phenomena that causes inaccuracy in Magnehelic® and Capsuhelic® gages when mounted in other than a vertical position.
What might be the cause for Magnehelic® gages filling approximately 1/3 full of water, with lots of liquid droplets on the glass. Both are outside mounted on the side of an air stripping tower. One is a differential pressure gage that measures the pressure drop across a pitot tube. The other just measures the back pressure in the stripper. What can be done to fix the malfunction?
Answer
It looks like you’re getting some condensation in the Magnehelic®, which is causing it to collect on the bottom of the face. Since the Magnehelic® is not encapsulated, it is not recommended to be used in applications where moisture can form. One option to fix the problem is installing a liquid filter (like an F222) to filter out that moisture. Another option is to install a Capsuhelic (Series 4000), which is made to handle both air and liquid.
Can the ASF option be used as a tattle tell? Or do you have something that could be used as a tattle tell on the 2000 series DP gages?
Answer
The ASF option cannot be used as a tattle tell. It is just there for visual indication of a set point. We have nothing with our 2000 series that can act as a tattle tell, however our series DM-1000 DigiMag will have a peak valve function built in.
I have a Dwyer Magnehelic, can I pressure test a furnace gas valve with natural gas with this instrument?
Answer
The standard Magnehelic is not recommended for use with natural gas. For natural gas applications, we would recommend a Magnehelic with a Buna-N diaphragm and an oil impregnated case for better chemical compatibility and a reduced leak rate respectively.
For the Series 2000 Magnehelic Differential Pressure Gauges, what panel mounts are compatible with the A-135 rubber gasket?
Answer
Any of our panel or flush mounting brackets will work with the A-135 rubber gasket. The rubber gasket just gives you a tight seal between the Magnehelic’s bezel and the bracket.
Is the Magnehelic 2000 suitable for use in a Class 1 Div 1 environment?
Answer
No, the 2000 Series Magnehelic Differential Pressure Gauge does not have any certifications officially allowing it to be used in a Class 1 Div 1 environment.
Standard gages are calibrated in the vertical position, and should be used in that position for maximum stated accuracy. Ranges above 17.5 in w.c. may be used at any angle, and stay within specified accuracy, by simply re-zeroing. Ranges below 17.5 in w.c. should be ordered using the –TA tilt angle option with the angle specified.
We use the model 2310 & Mount Ring A-286, I'm looking for a 3D or STP file for both. The current models I have are lacking in detail.
Answer
All of our available drawings are on our Website, under the Drawings tab. We do offer a 3-D drawing for Series 2000 and for A-286. The drawing for Series 2000 is a generic drawing.
What is the best method of measuring actual air flow in process ducts to verify process air flow sensors (differential pressure sensors, air flow stations, etc.)
Answer
There are two ways to measure air flow in process ducts. The most common means is the use of a Series 2000 Magnehelic® Differential Pressure Gage. This gage can be ordered with a square root output that will read in flow units. You will have to specify the maximum differential pressure at your desired flow rate. Along with the gage, a pitot tube (connected by means of rubber or vinyl tubing) is also used. The pitot tube must be pointed directly into the air stream. Care must be taken to ensure that the pitot tube should be inserted at least 8-1/2 duct diameters downstream from elbows, bends or other obstructions which cause turbulence. The alternative method uses a 100 AV Durablock® Air Velocity Gage kit. The kit includes a manometer, a stainless steel pitot tube, rubber tubing with connectors, and red gage fluid. The pitot tube, pointed directly into the air stream, senses total and static pressure. The manometer then senses velocity pressure (difference between total and static pressure).
Mounting bracket flush mount Magnehelic® gage in bracket. Bracket is then surface mounted . Steel with gray hammertone epoxy finish. 6.3" x 7.7" x 4.0", 1.30 lb.
1-3 days*
$44.50
A-300
Flat aluminum bracket for flush mounting Magnehelic® gage. 6.8" x 6.0" x .1", .35 lb.
1-3 days*
$39.25
A-310A
3-way vent valve, plastic, 1/8" NPT to 1/4" metal tubing, 80 psi rating, replaces former Model A-310 (brass). 2.3" x .8" x .1", .10 lb.
1-3 days*
$25.75
A-320-A1
Weatherproof enclosure, ABS, compatible with Series 2000 Magnehelic®, includes 2 sections of precut silicone tubing, banjo fittings, and threaded pressure connections pre-installed.
1-3 days*
$259.10
A-320-B1
Weatherproof enclosure, ABS, compatible with Series 3000MR/MRS Photohelic®, Series 605 Magnehelic®, Series DH3 Digihelic® (to fit, the casing on the electrical plug must be removed), Series 2000 Magnehelic® with medium and high pressure options
1-3 days*
$347.15
A-320-A-SS
Instrument enclosure, 304SS, brushed finish, compatible with 2000 Magnehelic® gage
Weatherproof enclosure, ABS, compatible with Series 2000 Magnehelic®, DM-1000 DigiMag®, DM-2000, Series 605 (with -SS option), instruments with backwards compatible bezel option
1-3 days*
$347.15
A-321
Brass safety relief valve, protects Magnehelic® gage or Photohelic® switch/gage against over pressure due to regulator failure, etc, opens at 10 psi. Mounts in tee fitting. 1/4" NPT(M) (use two for DP application). .5" x .5" x 1.5", .10 .lb
1-3 days*
$61.00
A-368
Surface mounting plate, aluminum, for Magnehelic® gage.
1-3 days*
$11.25
A-369
Stand-hang bracket, aluminum, for Magnehelic® gage.
1-3 days*
$17.75
A-371
Surface mounting bracket, use with Photohelic® switch/gage on horizontal or vertical surfaces, also for Capsu-Photohelic® switch/gage on vertical only. Also Magnehelic® -MP, -HP models.
1-3 days*
$56.00
A-401
Plastic carrying case (7-9/16" x 5-7/8" x 2-13/16").
1-3 days*
$38.25
A-432
Plastic carrying case for Magnehelic® gage of standard range, except high pressure connection, includes 9 ft (2.7m) of 3/16" ID rubber tubing, stand-hang bracket & terminal tube with holder. 9.1" x 7.4" x 3.6", 1.30 .lb
1-3 days*
$68.50
A-448
3-piece magnet kit for mounting Magnehelic® gage directly to a magnetic surface, 3.3" x 1.7" x .5", .20 .lb
1-3 days*
$16.00
A-464
Flush mount kit for Magnehelic® gages (Magnehelic® sold separately)
1-3 days*
$30.25
A-464-SS
Stainless steel flush mounting kit for the Magnehelic® gages (Magnehelic® sold separately)
1-3 days*
$140.15
A-481
Installer kit, (includes 2 static pressure tips and PVC tubing).
1-3 days*
$7.15
A-605
Air filter kit - adapts any standard Magnehelic® gage for use as an air filter gage. Includes aluminum surface mounting bracket with screws, (2) 5 ft (1.5 m) lengths of 1/4" aluminum tubing, (2) static pressure tips & (2) molded plastic vent valves.
1-3 days*
$53.50
A-605B
Air filter kit with (2) plastic open/close valves, (2) 4" steel static tips, tubing & mounting flange
1-3 days*
$42.00
A-605C
Air filter kit with (2) plastic open/close valves, (2) plastic static tips, tubing & mounting flange
1-2 Weeks*
$33.00
A-607
Mounting panel for Magnehelic®
1-2 Weeks*
$6.90
A-610
Pipe mounting kit for 1-1/4" to 2" pipe. 5.6" x 4.6" x 1.4", 1.0 .lb (Magnehelic® sold separately)
1-3 days*
$39.25
200068-51
Mounting hardware kit for standard Magnehelics® (not MP or HP). Included in the kit: 2 each: A-339 adapters, A-330 pipe adapters; 3 each: mounting lugs, long screws, short screws)
