I have a total of 6 of these. Three look brand new. The others are debatable therefor I will list them in another listing. They all have all of the paperwork and the allen wrench. All of them power up but show weak battery.

Over $500 new!

https://www.fishersci.ca/shop/products/dr-ger-pac-5500-single-gas-detector-5/p-3830685

1- Single-gas detector

​for personal air monitoring

detection of carbon monoxide, oxygen or hydrogen sulphide

non-disposable

2- Tailor-made for tough industrial assignments

Dräger has specifically designed the Pac® 5500 to meet tough industrial requirements. The shock-proof rubber casing offers reliable protection against external, mechanical influences and corrosive chemicals. The device meets the requirements of IP68.

3- Large, language-free display

The large LCD display is particularly user friendly, and shows both the gas concentration and unit of measurement. It is also possible to activate the device's status display. In this case, the display only shows the concentration when the configured alarm threshold has been exceeded. Additional background lighting ensures that the display is always readable.

4- Reliable sensor technology featuring low operating costs

The Dräger Pac 5500 is equipped with the Dräger XXS sensor technology. These innovative sensors offer an extremely high performance, with fast reaction times of only ten seconds. The XXS sensors offer a long functional life of in excess of four years, including the Oxygen sensor, thus providing lower operating costs.

5- Event logger for 60 events

The Dräger Pac 5500 can store up to 60 events, along with their dates and times. Events such as activation and deactivation, gas and battery alarms, error modes, configuration adjustments, etc. can be loaded onto a PC via the infrared interface, and then can be analysed in detail.

6- Fast function test

Regular function tests are prescribed to ensure that the device always works flawlessly. Using the cost-efficient Dräger Bump Test Station, these tests can be performed within a matter of seconds.

7- Safety in any situation

Within the device, the sensor has been specially positioned to allow gas access at both the top and the front of the device. Even when the unit is placed in a pocket, or the gas entry has been accidentally covered, it is still possible to take a reliable reading.

8- Simple differentiation of the devices

The Pac 5500 is equipped as standard with a silver foil covering the keyboard. Foils in different colours help the users to distinguish the devices and therefore the measured gases easily and especially from a distance. You can choose the coloured foils directly with your order.

These hardy sensors can be used in extreme environmental conditions without triggering false alarms.

• Compact, robust and ergonomic design with intuitive two-button operation
• Ideal for personal monitoring of carbon monoxide (CO)
• Large, language-free backlit display continuously indicates gas concentration while simultaneously displaying the corresponding measurement unit
• Equipped with a sensor that allows gas intake from both the top and front of the unit to ensure continuous measurement, even if a gas inlet is covered
• Triple alarms for exceptional safety—clear, multi-toned signal, a bright, flashing 360° LED on top and bottom, and vibration
• Store up to 60 events, along with dates and times; infrared interface enables data to be loaded onto a PC for analysis (requires connecting cradle or E-Cal System and software, sold separately)
• When bump mode is activated, the unit automatically reminds users when a bump test or calibration is required
• Operates in a temperature range from -22° to +122°F (-30° to +50°C); relative humidity, 10 to 90%

Dimensions: 0.8L x 2.5W x 3.3 in. H (2.0 x 6.4 x 8.4cm). Weight: 3.8 oz. (106g).

Certifications

IP65 rated for ingresss protection. UL Classified as Intrinsically Safe for use in Class I, Division 1, Group A, B, C, D, E, F, G hazardous locations, Temp Code T4; ATEX, I/II 1/2 G EEx ia I/IIC, T4. CE mark.

Compliance

Complies with EMC Directive 89/336/EEC.

Thank You