Interlock DS®-25RS

The lion DS® instrument system is a fully approved Breath Alcohol Ignition Interlock Device.

The lion DS®-25 RS Interlock meets CENELEC EN50436 Parts 1 and 2 (2014) + A1 (2015) E-Mark, connecting the technology of the lion alcolmeter breathalyser to a vehicle immobiliser, eliminating the potential for a driver under the influence of alcohol to be in control of a vehicle on public roads and highways.

The lion DS®-25 RS Interlock offers the user considerable flexibility with regards to connectivity of third party devices such as cameras, GPS, telemetry and GSM systems.  Contact Lion for further information.

The vehicle interlock is established and recognised worldwide as a significant contributor to the reduction of drink driving.

Typical Applications

Road Transport – Truck & Bus, Cars (Electric, Hybrid, Diesel and Petrol)

Many countries have made it a legal requirement for public transport vehicles to have an interlock fitted. In several European countries school buses and mini buses are protecting their passengers with the installation of a lion DS®-25 RS. Offender programmes are now in place throughout Europe. Participant countries include: Austria, Belgium, Denmark, Finland, France, Poland and Sweden.

Industrial commercial– Trams / Off Road Equipment / Fork Lift Trucks / Aerial Platforms / Cranes

Fleet Managers and Company Directors

Your employees safety is paramount and driving is considered as potentially one of the most dangerous activities undertaken by most employees. The addition of a lion DS®-25 RS Interlock fitted to your company fleet vehicles will ensure that your business is taking the necessary measures to manage your duty of care obligations, taking into account any key risks relating to the driver, the vehicle and the journey. Under the Corporate Manslaughter and Corporate Homicide Act, driving any vehicle on company business, regardless of ownership, is subject to legislation.

A vehicle Interlock will protect your business, your staff, the public and your property. Many companies are ensuring that they have a robust alcohol and drugs policy in place and the lion DS®-25 RS Interlock will enable your business to meet its duty of care requirements and reduce the potential for being convicted of corporate manslaughter, should the unthinkable happen.

Ensure that you have taken the necessary steps to safeguard your organisation and personnel.

Technical Specification

Instrument Dimensions

151mm x 71mm x 35mm




CENELEC EN50436 Parts 1 and 2 (2014) + A1 (2015) E-Mark, UTAC Approved

Sensor Type

Electrochemical Fuel Cell

Operating temperature range

– 45°C to + 85°C

Operating Humidity Range

10 to 95%, RH non-condensing

Power up time

4 seconds at 20°C (optional power on at door opening)

Operational Voltage

9V to 36V


12 month calibration

Data output

Via cable to PC based product specific download software RS232 Port to external devices (Telemetry / GPS / Camera)


24 months, parts and labour



Packs of mouth pieces are available.

The DS®-25RS Interlock is available for purchase from Lion direct in the UK only.

For international sales please consult the distributors page for local contact information.