What is the Draeger-Tube System?
In order to optimize your gas detection results, a clear understanding of the Draeger Tube System must be discussed. So, exactly what is a Draeger Tube System? The System contains two key parts that work in tandem. First, the Draeger Tubes are glass vials filled with a chemical reagent that reacts to a specific chemical range or family of chemicals. Second is the Draeger Accuro Pump, which draws a calibrated, repeatable 100 ml sample of air through the tube using the manual internal bellows pump. If the targeted chemical(s) is present the reagent in the tube changes color and the length of the color change typically indicates the measured concentration.
The Draeger Tube System is the world’s most popular form of gas detection! Why – 3 main reasons: First, Draeger Safety has made gas detection easy with the wide range of Draeger Tubes. Second is the rugged and reliable Draeger Accuro Pump. Third is the ability to conduct gas measurements in nearly any accessible location.
Tech Tips for Draeger Accuro Accurate Operation
#1 PUMP LEAK TEST – In order to draw the correct 100 ml sample of air through the Draeger Tube, the bellows pump must be at peak performance. Draeger has established a quick and easy field test to confirm the pump is in good working order. To perform the Pump Leak Test, simply insert an unopened Draeger Tube into the Socket. Squeeze pump completely and release. The pump is adequately leak-proof if the “end of stroke indicator” has not appeared after 15 minutes. Remove the tube, reset the counter to zero and you’re ready to start detection.
#2 RESET STROKE COUNTER – Each Draeger Tube has a specific number of strokes required for an accurate measurement. This number is printed on each tube, ex: n=2. If you start a gas detection test without the counter set to zero, there is no guarantee that the correct number of strokes will be achieved. The reset button is recessed to prevent accidental resetting. You can use the tip of an un-opened Draeger Tube or small screwdriver to actuate the reset to zero.
#3 RELEASE BELLOWS FULLY – In order for the full 100 ml air sample to pass through the detector tube, the bellows has to expand fully. Some of the Draeger Tubes have double stack tubes or the reagent could be very dense. In these cases, the bellows will take more time to complete the 100 ml draw cycle. Allow the bellows to expand fully and you’ll get the correct calibrated amount of sample air through the system.
#4 FLUSH WITH CLEAN AIR – After you have completed the detection tube cycle. Remove the used tube and flush the pump with a few strokes of clean air. This will allow the bellows to exhaust the cavity and be ready for the next detection. Also, remember to reset your stroke counter.
This pump is designed and built for harsh environments. In order to aid in a long pump life, consider one of our Draeger Hard Side Kits for your next pump purchase. Following these ShopCross Tech Tips will certainly aid in the performance of your gas detection projects. We have more Tech Tips for Draeger Safety ahead. Next up will be Draeger Accuro Pump Maintenance.