Checkpoint and Hold-Baggage Screening Standards: ECAC Doc 30, EDS, and EDSCB Explained

Procurement queries such as "baggage scanner compatible with 1000 mm conveyor width, ECAC Standard 3 certified, for a DXB terminal retrofit", "compare HI-SCAN 10080 vs Leidos ClearScan vs Rapiscan 920CT for checkpoint screening", and "we're replacing an old Hi-Scan 9075 checkpoint scanner" all turn on one thing that the model numbers hide: the detection standard the equipment is certified to. A scanner is only specifiable if it meets the screening standard the regulator requires for that screening point. This brief explains the standards framework — ECAC Doc 30, EDS, EDSCB, Standard 3 and 3.1 — and how to use it to compare checkpoint and hold-baggage scanners on a like-for-like basis, without quoting invented throughput or detection figures.

The standards framework

Aviation security screening is anchored at the top by ICAO Annex 17 (Security), which obliges states to screen passengers, cabin baggage and hold baggage. Each region then implements it:

• In the EU, security is governed by Regulation (EC) 300/2008 and its implementing regulations (notably 2015/1998). Equipment performance is defined through the ECAC (European Civil Aviation Conference) Common Evaluation Process (CEP), documented in ECAC Doc 30, Part II (security). ECAC runs a centralised testing process and maintains lists of equipment that has passed each performance standard.
• In the US, the TSA certifies and qualifies screening equipment to its own standards under 49 CFR.
• In the Gulf, GCAA (UAE), GACA (Saudi Arabia), QCAA (Qatar) and counterparts set the national security programmes; Gulf specifications very commonly require ECAC-approved equipment (and sometimes TSA), because ECAC's CEP is the widely recognised independent benchmark.

The key idea: "ECAC Standard 3" is not a model or a feature — it is a performance tier that equipment is independently tested against. When a tender says "ECAC Standard 3 certified", it means the unit must appear on ECAC's list of equipment that passed that detection standard.

EDS vs EDSCB — two screening points, two standards

The two acronyms confuse many buyers because they sound similar but apply to different screening points:

• EDS — Explosive Detection System. This is the standard for hold-baggage (checked-baggage) screening. Inline EDS machines, typically computed-tomography (CT) based, screen checked bags automatically for explosives as they move through the BHS. The performance tiers are the ECAC Doc 30 EDS standards. Standard 3 is the long-established compliance floor (it was mandated for European hold-baggage screening by the 2018–2022 deadlines); the leading edge has since moved on, with Standard 3.1 and Standard 3.2 now the tiers current systems are built to, and Standard 4.0 identified as the next-generation tier. A current procurement should confirm the exact tier its regulator requires and weight the unit's upgrade path toward the higher standards. Higher standards mean more demanding detection performance.
• EDSCB — Explosive Detection System for Cabin Baggage. This is the standard for checkpoint (cabin/carry-on) screening — the CT scanners increasingly deployed at security checkpoints that let passengers leave liquids and laptops in the bag. ECAC defines EDSCB performance tiers as Standard C1, C2 and C3 (with C4 in development at the time of writing). C3 — which allows large electrical items and liquids, aerosols and gels (LAGs) to stay in the bag — is currently the highest tier for which equipment is being approved, and is the goal for new checkpoint installations. CT-based EDSCB is what is replacing the older conventional dual-energy X-ray checkpoint machines (the "Hi-Scan 9075"-type units in the legacy-replacement query).

So a hold-baggage tender talks in EDS Standard 3 / 3.1 / 3.2; a checkpoint tender talks in EDSCB Standard C1/C2/C3. Citing the wrong family is a common specification error.

How the technology maps to the standards

• Conventional dual-energy X-ray — the legacy checkpoint and some hold-baggage machines; produces the familiar colour-coded 2-D image (organics orange, inorganics green, metals blue). Increasingly insufficient for the highest checkpoint and hold standards on its own.
• Computed tomography (CT) — rotates the X-ray source to build a 3-D image and automatically detect explosive signatures by density and shape. CT is the basis of modern EDS (hold) and EDSCB (checkpoint) machines, and is what enables the higher ECAC standards and the "keep liquids and laptops in the bag" checkpoint experience.

The model numbers in the comparison queries (HI-SCAN 10080, ClearScan, 920CT, etc.) are vendors' CT or X-ray product lines; the meaningful comparison is which ECAC standard each is approved to, the conveyor/tunnel dimensions, the throughput at the airport's operating concept, the false-alarm/automatic-clear performance, and the integration with the BHS or checkpoint lane.

Reading a scanner specification correctly

The right comparison checklist for a buyer:

• Screening point — checkpoint (cabin) or hold? This selects EDSCB vs EDS.
• ECAC standard required — the specific tier (e.g. EDS Standard 3 / 3.1 / 3.2, or EDSCB C2 / C3), and whether the unit is on the ECAC approved list for it. This is the gating criterion; everything else is secondary.
• Physical envelope — tunnel/conveyor dimensions (the "1000 mm conveyor width" in the query), bag size limits, footprint, and whether it fits the existing lane or BHS line in a retrofit.
• Operating concept and throughput — automatic clear rate, false-alarm rate, and how those translate to lane throughput at the airport's concept of operations. Treat any single "bags per hour" claim with caution until tied to the real concept.
• Networking and remote screening — modern systems support centralised/remote image analysis and TIP (Threat Image Projection); compatibility with the airport's screening architecture matters.
• Lifecycle and support — these are maintenance-intensive, regulated assets; in-region service, software/standard upgrade path (e.g. Standard 3 → 3.1), and spares availability are real costs.

GCC-specific considerations

• Gulf specifications routinely require ECAC approval (often the latest operative standard) for new procurements, with national-authority (GCAA/GACA/QCAA) sign-off.
• Retrofits (the DXB-retrofit query) constrain the choice to units that fit the existing tunnel and BHS line and integrate with the existing screening matrix.
• Heat and dust in non-conditioned BHS halls affect equipment; environmental conditioning of the screening area is itself a requirement.
• Standard migration — buyers should weight the upgrade path to the next standard (e.g. 3.2 and the forthcoming 4.0 for hold baggage, C3/C4 for checkpoint) to avoid a short asset life as ECAC tiers advance.
• In-region certified service is essential for a security-critical, regulated asset.

What this means for procurement

Identify the screening point (checkpoint vs hold), then state the exact ECAC standard required and demand evidence the unit is on the ECAC approved list for it — that is the gate. After that, compare on physical envelope (especially for retrofits), operating-concept throughput and false-alarm performance, networking/remote-screening architecture, the upgrade path to the next standard, and in-region service. The major screening-equipment vendors include Smiths Detection (HI-SCAN), Leidos (ClearScan, formerly L3), Rapiscan/OSI Systems, Analogic, Nuctech and others; the right answer is whichever approved unit best fits the lane, the concept and the lifecycle — not the one with the biggest tunnel. The model number is meaningless until you know the standard.