Drager Interlock XT
Drager Interlock XT

Product Code - 8319600

exc VAT £2,145.54 inc VAT £2,574.65

Please note: this product is now obsolete.  See the Interlock 5000 or 7000 as a replacement.

Description / Features / Spec


Drager Interlock XT

Please note: this product is now obsolete.  See the Interlock 5000 or 7000 as a replacement.

The Dräger Interlock XT is a breath-alcohol measuring instrument with a vehicle immobilizer. After taking a breath alcohol measurement, it prohibits a driver who has consumed alcohol from starting the motor. By installing a Dräger Interlock XT, you an avoid accidents caused by alcohol consumption. Additionally, long-term changes in the drinking attitude may be an added benefit.


The Dräger Interlock XT comprises two main components: the breath-alcohol measuring instrument with the measuring system, which is situated inside the vehicle, and the control unit which is generally installed under the dashboard and allows or prevents current being supplied to the vehicle's starter system.  


When the ignition is switched on, the Dräger Interlock XT requests a breath sample from the driver. The result of the breath-alcohol concentration measurement determines whether the vehicle's starter is released and the engine can be started. 


Car drivers find long waits after switching on the ignition particularly annoying. Therefore, during development of the Dräger Interlock XT, particular attention was paid to ensuring that the instrument would be ready for use quickly. Because the Dräger Interlock XT even works perfectly at -45 °C (during the Scandinavian winter, for example) and at 85 °C (in blazing sunlight, for example), it was given the name "XT", for "eXtended Temperature".


The Dräger Interlock XT determines the breath alcohol concentration by means of an electrochemical sensor system, as it is

used also in breath-alcohol measuring instruments of police authorities. It reacts with high specificity to alcohol. As a result, other exhaled substances do not distort the measurement result. 


While the vehicle is in use, all relevant events are recorded in the Dräger Interlock XT's data log: date, time, submission of or refusal to submit a breath sample, measured alcohol concentration, engine starts and stops, electrical bypassing of the Interlock and any other attempts to tamper with the device. The data can be downloaded and compiled in a data record.


The use of auxiliary means to circumvent the Dräger Interlock XT, as for example an air pump, is reliably detected and starting the motor is prevented.


Dräger is world market leader in breath alcohol measurement. The Alcotest® family of products is the most successful breath alcohol measuring instrument world-wide. The well known Alcotest tube with the sample bag is probably the oldest method of obtaining proof of alcohol consumption. Today, most alcohol detection devices are electronic. They are used on all five continents for traffic safety by police authorities, for workplace alcohol testing, as well as aiding in the diagnosis of medical patients. Dräger’s long term experience and time proven measuring technique establishes the basis of the Dräger Interlock XT.


Measuring principle Electrochemical sensor

Ambient conditions for operation

Temperature -45 to 85 °C (-49 °F to 185 °F)
Ready for test
  • < 20 sec. (above 20 °C / 68 °F)
  • < 3 min. (at -40 °C / -40 °F)
Display graphic LC-display in the handset with full text messages
Calibration interval typically 12 months

Data memory

in control unit, for more than 30.000 events

Dimensions (H x W x D) Handset approx. 150 mm x 70 mm x 40 mm
Control unit approx. 115 mm x 105 mm x 40 mm


Handset approx. 175 g
Control unit approx. 320 g
Voltage supply 12 to 24 V; Starter relay may switch up to 48 V
Relay for the lead starter relay < 16 A, continuous; < 40 A, peak
Current consumption  < 2 A; maximum; < 20 mA; stand-by
  • General German Operating Permission (Allgemeine Betriebserlaubnis)
  • EN 50436-1: 2005, EN 50436-2: 2007
  • e-Mark (EU Directive 72/245/EEC with last applicable amendment)

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Take advantage of our web-exclusive free UK mainland* delivery offer on orders over £75 ex VAT.  See all costs for delivery below and visit our main delivery page for more information on timescales as some restrictions may apply.

UK & Ireland Delivery Options

Our offices will close for Christmas on the 23rd of December at 5.30pm until Monday the 4th of January, 2021 where we will be open from 8.30am.  Our last shipping day for in-stock orders will be the 23rd of December before 12pm.  Please check with our Sales Team on 0141 771 7749 for stock availability.  Any orders made during the period of closure will not be processed until the 4th of January and a lead time will advised.  

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International Delivery Options

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Simply log on to your customer account, note the order reference number and email the full cancellation details to [email protected] or contact us on 0844 550 0001. Assuming the order has not been despatched we will cancel.

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We recommend you inspect all goods prior to signing for and accepting delivery. If there is any visible damage to the outer packaging, ensure goods are sign for as damaged. In instances where it isn’t possible to sign for goods as damaged, these should be signed for as unexamined.

Note: If your goods happen to develop a fault out with the standard returns period but within supplied warranty period or if you require any additional assistance, please contact us on 0844 550 0001 or email [email protected]


All postage, handling, customs and duty charges for all returned goods are the responsibility of the customer. We recommend using a fully traceable, insured service as goods are your responsibility while in transit.