© Drägerwerk AG & Co. KGaA 1

Sometimes, a material concentration as low as 0.1 ppm can determine autho-rization and even whether or not an alarm will be activated. This is especially true in the case of low threshold values or alert limits. This is why detecting hazardous gases requires maximum precision.

Ensuring the accuracy of

your measurements

© Drägerwerk AG & Co. KGaA 2

ENSURING THE ACCURACY OF YOUR MEASUREMENTS

Why you can be sure with Dräger-Tubes® With a Dräger-Tube, you can be sure that the measurement results displayed exactly match the actual material concentration in the atmosphere. Every Dräger-Tube is calibrated individually – each and every batch. At Dräger, we invest a lot of time and energy on Dräger-Tubes to ensure consistently high quality.

Whatever you see on the outside is what’s inside Most Dräger-Tubes are scale tubes, and the length of the color zone indicates the concentration of the substance measured. Each Dräger-Tube is completely calibrated so that you can read the con-centration directly by using the scale printed on the tube. The great advantage of this measuring system is that the tube is constantly ready for use. No additional calibration by the user is necessary, which saves on maintenance costs. To ensure correct calibration in conjunction with sufficiently long shelf life, Dräger has implemented an extensive system of quality assurance procedures (QA): batch control.

Verified quality in each batchThe Dräger-Tube is one of Dräger‘s most tradition-steeped pro-ducts. It has been manufactured at the company‘s headquarters in Lübeck, Germany for over 125 years. The standard product range includes approximately 250 types of tubes, and each year around one thousand different batches are produced. Dräger has implemented a strict quality assurance system for the development, production, and inspection of Dräger-Tubes. This system complies with international standards: It matches the re-quirements of DIN ISO 9001 and is regularly certified by an in-dependent testing institute. Because of this, the life span of a Dräger-Tube can be traced and monitored from product conception and individual development stages to production and subsequent product support.

1. Purchasing: Raw materials have certified quality Dräger-Tubes feature a reagent system on a solid carrier material that reacts to contact with a specific gas or vapor with a characte-ristic color change. To ensure a consistent color change in the tube, only chemicals that have been certified for quality by the manufac-turers are used to produce Dräger-Tubes.

2. Production: According to strict German and inter-national standards Dräger short-term testing tubes and the accompanying testing tube pumps are approved as a system by an IFA-authorized testing agency. Here, testing tube pumps are examined and documented in terms of flow properties (stroke volume, stroke time, leaks), du-rability, and mechanical resilience.

ST-36-20

01

Dräger-Tube after measurement:

The air sample causes a clearly visible colour

change.

Prelayer

Number of strokes

Indicator layer with scale

Concentration unit

Dräger-Tube before measurement

© Drägerwerk AG & Co. KGaA 3

ENSURING THE ACCURACY OF YOUR MEASUREMENTS

3. Tests and calibration: Each batch is thoroughly checked Dräger-Tubes are produced in batches, and each batch is separate-ly tested and calibrated. The calibration procedure is based on the respective standards. Afterward, the reagent system that is produ-ced is tested according to Dräger-Tube inspection specifications to ensure sensitivity and shelf life. Finally, only Dräger-Tubes that meet inspection specifications are released for distribution.

4. Storage: Continuous quality inspection Although a Dräger-Tube is a closed glass body, the quality of the chemicals it contains can change over time. For this reason, the

maximum storage time of a new Dräger-Tube is determined during the development phase via temperature simulations. This is nor-mally two years. The total storage time is divided into the storage time at Dräger and a consumption time at the customer‘s premises. The storage at Dräger is subject to defined and controlled condi-tions.

For each batch that is produced, a random sample is taken and stored separately for up to five years. The measurement characte-ristics of the retained Dräger-Tubes are tested at specific intervals over a period of two years. If deviations occur, the customer is informed immediately.

IMPRINTUSADräger Safety AG & Co. KGaARevalstraße 123560 Lübeck

www.draeger.com

Easy-to-check expiration date A clearly designed label on the packaging lets you see all the important information about your respective Dräger-Tubes at a glance.

Order Code

Dräger-Tube® Name

Batch Number

Plastic Box: Front

Storage TemperatureOrder Code

Batch Number

Shelf Life

Plastic Box: Back