Draeger Pac 3500 O2 Gas Monitor 4543959

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The Draeger Pac 3500 Single Gas O2 Monitor provides workers with continuous oxygen levels and alerts you when levels have reached explosively high (above 23.5%) or dangerously low (below 19.5%) levels. This popular two-year disposable monitor displays continuous readings make it more analytical and safer than many competitive models that simply alert you when a dangerous gas is present. In the event of reaching high or low levels of O2, the Pac 3500 Monitor will sound a 90 dB alarm while flashing 360 degree LED lights and vibrating.

Our customers working in confined spaces and oil and gas appreciate that this monitor won't break if dropped. The detector's durable housing is coated with protective rubber for guarding against impacts and resisting corrosive chemicals. It also meets IP65 requirements to ensure operation if it's accidentally splashed with water.

Other features that make the Pac 3500 a great O2 gas detector are its outside filter for easy replacement, 10 second response time, back-lit display, and its ability to go two years without calibration.

The Draeger O2 Monitor provides top-of-the-line detection, with sensors that pick up a resolution of .1 Vol.% and a measuring range of 0-25 Vol.%. Draeger is known worldwide for the dependability and unmatched accuracy of their sensors - a big reason why that same technology can be found in hospitals, fire and police departments, mines, and a whole host of industrial work sites. A miniature version of Draeger's famous XXS sensors can be found in the Pac 3500.

Key Features:
  • Measuring range of 0-25 Vol.%, resolution of .1 Vol.%
  • Two year lifespan
  • Constant O2 concentration readout
  • Two button interface
  • Back-lit display
  • Durable housing and crocodile D-ring clip
  • Outside filter for easy replacement
  • IP65 for water resistance
Total Weight:
3.8 oz.

Part Number:
More Information
Price $212.92
SKU DRA01-4543959
Product Weight (lbs.) 0.2
Weight 0.5000
Brand Draeger
MPN 4543959
Type Single-Gas
Gas Type Oxygen (O2)
5th Sensor No
Color No
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  1. Yawoo

    2014-12-24 19:05:31

    Is the battery replaceable for this particular oxygen monitor?

    Also what kind of battery is it?

    1 answer
    1. Chris

      2014-12-24 19:05:31

      The Drager PAC3500 series of gas detectors have replaceable batteries. The recommended replacement is a Panasonic CR123A lithium 3 volt battery. This type of battery is available from other manufacturers as well, with similar part numbers that all seem to include the ‘123’ in their nomenclature.

  2. T

    2015-03-18 23:03:03

    can the unit be turned off when not in use?
    can the alarm be turned off?

    1 answer
    1. Chris

      2015-03-18 23:03:03

      The Draeger PAC 3500 detectors may be turned off when not in use. This will extend the battery life of the unit. However, the 2 year countdown still applies. The alarms do not have a ‘silence’ mode available. You could turn the detector off, and that will silence the alarm. But as long as the unit is turned on, and dangerous levels of gas are detected, the alarm will sound.

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