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  • Dwyer Series 477 Handheld Digital Manometer, Intrinsically Safe, FM Approved
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by Dwyer

Dwyer Series 477 Handheld Digital Manometer, Intrinsically Safe, FM Approved

Available in multiple versions


Price: $278.99 - $620.00
Product Specifications
Brand Name Dwyer
Display LCD
Measurement Accuracy +/- 0.5 percent
UNSPSC Code 41103311

The Dwyer Series 477 intrinsically-safe digital manometer provides positive... Read full product description


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0-1.000" WC B009PAFRYK
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$364.00
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0-10.00 psi B009PAFSPS
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$284.00
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0-10.00" WC B009PAFU0G
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$342.00
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0-100.0 psi B009PAFV00
$284.00
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0-150.0 psi B009PAFVWS
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$284.00
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0-20.00 psi B009PAFWFO
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0-20.00" WC B009PAFYOI
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$342.00
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0-20.00"WC Range with Telescoping Pitot Tube, FM Approved with Air Velocity Kit B009PAFXUS
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$620.00
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0-200.0" WC B009PAFZJM
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$284.00
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0-30.00 psi B009PAG09Q
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$284.00
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0-4.000" WC B009PAG10E
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$342.00
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0-40.00" WC B009PAG1R2
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Product Features

  • Intrinsically-safe digital manometer for field calibration, monitoring or troubleshooting HVAC systems, performing clean room inspections, air velocity monitoring, and natural gas appliance-line testing
  • FM-approved intrinsically safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations
  • Accuracy is + or - 0.5% of full scale at 60 to 78 degrees F, and + or - 1.5% full scale at 32 to 60 and 78 to 104 degrees F
  • Pressure measurement units include inH2O, mmH2O, bar, mbar, psi, inHg, mmHg, Pa, kPa
  • Non-volatile memory function provides storage of up to 40 readings, and audible and visual alarms indicate out-of-range measurements

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B00ATGB92S
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (3 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

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Product Description

The Dwyer Series 477 intrinsically-safe digital manometer provides positive, negative, and differential pressure measurements, and is used to perform field calibration, monitoring or troubleshooting HVAC systems, performing clean room inspections, air velocity monitoring, and natural gas appliance-line testing. The meter is FM-approved intrinsically safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations. It has an accuracy of + or - 0.5% of full scale at 60 to 78 degrees F, and + or - 1.5% full scale at 32 to 60 and 78 to 104 degrees F. The extruded aluminum case provides durability. The backlit four-digit LCD displays the pressure measurement. User-selectable measurement units include inH2O, mmH2O, bar, mbar, psi, inHg, mmHg, Pa, and kPa. The non-volatile memory function provides storage of up to 40 readings, and audible and visual alarms indicate out-of-range measurements. The zero function nulls minor pressure differences before measuring, and display hold retains last reading when the display cannot be seen during testing. The meter is powered by a 9V battery (included) and automatically shuts off after 20 minutes to preserve battery life.

Specifications
Pressure typesPositive, negative, and differential
Media typeAir and compatible combustible gases
Case materialExtruded aluminum
Pressure unitsinH2O, mmH2O, bar, mbar, psi, inHg, mmHg, Pa, kPa
DisplayFour-digit LCD
Temperature limits0 to 140 degrees F/-17.8 to +60 degrees C
Compensated temperature limits32 to 104 degrees F/0 to 40 degrees C
Dimensions6-17/32 x 2-13/16 x 29/32 (H x W x D)
Power9V alkaline battery
Agency approvalsCE, FM

H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Manometers measure the pressure of a liquid or gas. They are used in laboratory, medical equipment, engineering, automotive, and heating, ventilation, and air-conditioning applications. Manometers measure any combination of gauge, absolute, or differential pressures. Gauge pressure is the amount of pressure in a system relative to the ambient pressure, absolute pressure is the amount of pressure in a system relative to an absolute vacuum, and differential pressure is the difference between two pressures. Analog manometers are composed of columns of liquid, and they use gravity and the liquid's density to calculate pressure. Because they have no moving parts, analog manometers do not require re-calibration. Digital manometers have pressure sensors that are connected to a system with a hose to provide a digital readout of the amount of pressure present in a system. They use microprocessors to calculate pressure, and they require periodic calibration to help ensure accuracy.

Dwyer Instruments manufactures measurement and control instruments, including pressure gauges, flow meters, level instrumentation, temperature instrumentation, and air quality monitors. The company, founded in 1931, is headquartered in Michigan City, IN.


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Most Helpful Customer Reviews

By jeff h on July 2, 2014
Size: 0-20.00"WC Range with Telescoping Pitot Tube, FM Approved with Air Velocity Kit
I cannot say enough good things regarding this meter. This is great. I am in the hvacr, energy management, and indoor air quality industries and use this meter several times a week. It is indispensable. It is very versatile, easy to use, durable, and accurate. Definitely made for field use.
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Size: 0-10.00 psi Verified Purchase
Have used Dwyers, Digitrons and others before and have returned to purchase more Dwyers. Instrument performs to our expectations, solid build, intrinically safe and reliable. Delivery, price and service from Amazon were exceptional. Local agent charges twice the price.

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Size: 0-10.00 psi Verified Purchase
Had to get it via a local (Singapore) postal services co. would be better if can get them direct.
Overall OK with item.
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