A screening device that records a result against a shift, a vehicle and a person, and cannot quietly be circumvented. The measurement is the straightforward part; the engineering is in the record surviving scrutiny and the sensor still reading correctly two years after commissioning.
Fitness-for-duty screening exists to produce a decision at sign-on: this person starts the shift, or they do not. A device that produces a number and no defensible record produces an argument instead.
The important distinction is stated first, because getting it wrong is expensive. A screening instrument is not an evidential one. Screening devices indicate; evidential instruments are subject to a separate approval regime and are used where a result may be relied on in a legal proceeding. Specifying one and expecting the other is the most common error in this category.
Beyond that, the difficulty is drift and circumvention. Electrochemical sensors age and require scheduled recalibration, so a fleet of devices needs a calibration state that is tracked centrally rather than assumed. And any device where the result affects whether someone works will be tested by the people it tests.
| Parameter | Detail |
|---|---|
| Purpose | Screening at sign-on; not an evidential instrument |
| Sensor | Electrochemical, with scheduled recalibration and a tracked calibration state |
| Sample integrity | Flow and pressure conditions checked so a partial or substituted breath is rejected |
| Identity | Operator credential bound to the result, so a reading belongs to a person |
| Record | Time-stamped and tamper-evident, retained centrally rather than on the device |
| Connectivity | Cellular or Wi-Fi with store-and-forward for depots and remote yards |
| Integration | Result exposed to fleet, access control or workforce systems as a pass or fail event |
| Environment | Depot, cab or gatehouse; temperature range affects reading and is compensated |
| Fleet management | Calibration due dates, device health and usage visible across the estate |
Maturity — silicon-proven, FPGA-validated or RTL stage — is confirmed at enquiry for the specific configuration you need, rather than claimed generically here.
Send the target node, the interface requirements and the integration context. If this is not the right fit, that will be said early rather than discovered at integration.
No, and the distinction matters. Screening devices indicate a result at sign-on; evidential instruments fall under a separate approval regime and are used where a result may be relied on in legal proceedings. Specifying one and expecting the other is the most common error in this category.
Electrochemical sensors age and need scheduled recalibration, so calibration state is tracked centrally with due dates and device health visible across the estate. A device that is overdue is flagged rather than trusted, because a quietly drifted sensor produces results that look normal and are not.
Any device whose result affects whether someone works will be tested by the people it tests. Sample flow and pressure conditions reject a partial or substituted breath, the operator credential binds the result to a person, and the record is tamper-evident and held centrally rather than on the device.
Yes — mouthwash, some medicines and recent drinking produce a transient elevated reading that does not reflect blood alcohol. A defined wait period before testing is part of the operating procedure, not an optional refinement.
The result is exposed as a pass or fail event to fleet, access control or workforce management systems. Where policy permits, it can gate vehicle access or key issue, though whether it should is a policy question rather than a technical one.
Man-down, gas exposure and fitness for duty.
PRODUCTVehicle side of the same operation.
SOLUTIONThe other depot accountability system.
INDUSTRYSafety-critical roles and evidence.
SOLUTIONTaking a device to manufacture.
PRODUCTFleet operation and update.
Tell us the specification, the constraint and the deadline. Programmes that cross silicon, radio, embedded and AI are where Faststream is strongest.