Locate Us 11 Kallang Place, #06-03,Singapore 339155
Operating Hours Mon-Fri | 9am-5pm



Personal Breath Alcohol Tester

The ALERT™ J4X portable evidential breath alcohol tester is trusted by law enforcement professionals worldwide. At its heart is our highest quality Electrochemical Sensor (Fuel Cell). It uses one button to control power, testing, history recall and calibration.

The ALERT™ J4X complies with the normative EN 15964.

Ease of operation

With one button to initiate operation and an iconic display to guide its sequence, the ALERTJ4X indicates when it is ready to take the test. The subject simply exhales into the mouthpiece and the instrument automatically determines the breath alcohol concentration. If a proper sample is not provided, an icon indicates that a retest is necessary.


The ALERT J4X uses an electrochemical sensor that is specific for alcohol - the standard for portable evidential breath testers used by law enforcement. This sensor provides quick response and rapid recycle between tests. The long term stability of the sensor is assured by routine calibration with a breath alcohol simulator.


The breath alcohol test results are presented on the LCD in a three digit measurement format that is selectable for each jurisdiction. A LED in the mouthpiece port is colour coded to provide a visual indication of the range. The ALERT J4X also provides a last test recall feature for certainty.

Fit for purpose

The ALERT J4X is powered by two AA alkaline batteries for normal operation. An accessory DC adapter provides auxiliary power to the sensor heater for operation at lower temperature ranges.

Ready to use

The ALERT J4X comes with instruction manual, carry case, DC adapter and a supply of mouthpieces.


  • Size : 150 mm x 88 mm x 35 mm
  • Weight : 300 grams
  • Sensor : Electrochemical (fuel cell)
  • Specificity : Alcohol only, no response to ketones or hydrocarbon
  • Ambient Temperature : -20°C to +50°C
  • Purge Cycle (Initial Test) : 5 seconds
  • Breath Sample : 5 second moderate and continuous breath sample
  • Analysis Time : < 25 seconds
  • Recycle (Recovery) Time : 5 seconds
  • BrAC Readout Format : mg/dL, g/dL, g/L, mg/L, µg/dL, µg/L
  • Range of Measurement : 0.00 to 0.50 g/dL
  • Accuracy : ± 5% at 0.10 g/dL
  • Display : Three digit LCD
  • Last test recall : Yes
  • Power / Battery : 2 AA alkaline
  • Number of Tests : > 1,000 tests
  • Mouthpiece : Round (model: 95-000250)
  • Calibration : Alcohol/Water Simulator
  • Optional : 2 & 3 year Product Protection Plan
  • Part Number: