A fast yet accurate, fully quantitative breath analysis instrument which can be used anywhere

The lion alcolmeter® SD-400 uses the Lion fuel cell sensor, so the reading is unlikely to be affected by anything that occurs naturally on the subject’s breath.

The lion alcolmeter® SD-400 has been used extensively by Police Forces around the world, for both screening and evidential testing processes.

The operator switches the instrument on, then attaches a new mouthpiece to the sampling port. He or she then instructs the subject to blow through it until the sample is taken. A short time later their alcohol level is shown on the clear, easy-to-read display: this is illuminated, for use at night.

When the reading has been taken, the operator removes and discards the mouthpiece. After a short delay the instrument is ready to use again on the next subject, as required. The result of the last test can be recalled to the display, if required.

Each breath alcohol reading is also stored securely in memory with date and time.

The instrument should be checked with an alcohol standard at regular intervals, and recalibrated if required.  The user may do this using an AlcoCal® product; or, alternatively, contact Lion to arrange for a calibration at the Lion Laboratories Ltd facility or contact your country distributor for local support.

A Printer Kit [printer plus carry case] is also available optionally for use with this instrument. This generates a permanent record of each test.

Technical Specification

Instrument Dimensions

169 x 80 x 39mm


Approximately 525g, with batteries


Unaffected by all other likely breath contaminants

Sensor Type

Lion Fuel Cell (standard version)

Measuring range

0.02 to 2.00 mg/L BrAC

Operating temperature range

-5°C to +40°C

Warm up time

There is no heater, so no warm-up time

Response Time

Typically 4s at 0.00mg/L
Within 10s if alcohol is present

Recovery Time

Typically 5s at 0.00mg/L
Within 30s up to 0.50mg/L
within 60s between 0.50 and 2.00mg/L

Power Supply

5 x new AA cells can provide up to 3000 breath tests

Calibration Adjustment

If checked regularly with a dry gas, calibrate every 12 months. Otherwise, to be calibrated every 6 months.

Calibration Standard

Either a dry-gas or a breath alcohol liquid simulator


12 months, parts and labour


Disposable Mouthpieces
Supplied in packs of 1,000

Protective Pouch
In grey or reflective-yellow leather

AlcoCal® Calibration Standard:
Please select from our range

lion alcolmeter® SD-400 Printer Kit:
To convert the 400 into a 400P

Data-400tm Software:
For extracting breath test data from the instrument to a PC operating on the Windows platform.

The lion alcolmeter® SD-400 is available for purchase from Lion direct in the UK only.

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