Our line of walk-through metal detectors ensures quick and non-intrusive screening, enhancing the overall safety of airports, event venues, and other public spaces. These detectors feature adjustable sensitivity settings, allowing you to identify potentially hazardous metallic items, regardless of their size.
Walkthrough metal detectors are security screening portals that use electromagnetic field technology to detect metallic threats on persons passing through. Standard equipment at courthouses, schools, stadiums, government buildings, and high-security facilities. Available in 18–90 zone configurations for indoor and outdoor deployments.
Detection Zones (Total)
(Total)
Detection Zones (Top to Bottom)
(Top to Bottom)
Detection Zones (Left to Right)
(Left to Right)
Environment
LED Indicator Bars
Adjustable Sensitivity by Zone
IP Rating
| Model | Zones | Environment | Type | Best For |
|---|---|---|---|---|
| 2MWT-i18Z | 18 | Indoor | Fixed | Schools, offices, light-security venues |
| 2MWT-i24Z | 24 | Indoor | Fixed | Courthouses, government buildings, hospitals |
| 2MPWT-i24Z | 24 | Indoor | Portable | Temporary school events, trade shows, indoor pop-up checkpoints |
| 2MWT-o18Z | 18 | Outdoor | Fixed | Warehouse loading docks, outdoor facility entrances |
| 2MPWT-o24Z | 24 | Outdoor | Portable | Stadium gates, festivals, outdoor events, construction checkpoints |
| 2MWT-o45Z | 45 | Outdoor | Fixed | Airports, large arenas, federal facilities |
| 2MWT-o90Z | 90 | Outdoor | Fixed | Maximum-precision high-security entry points |
Zone count is the most important specification when selecting a walkthrough metal detector. Zones are horizontal detection bands across the tunnel. More zones = more precise threat location and fewer false alarms.
| Zone Count | Detection Precision | False Alarm Rate | Typical Application | Example Models |
|---|---|---|---|---|
| 6 zones | Low (full body only) | High | Basic entry control, small facilities | Budget category entry |
| 18 zones | Medium (upper/lower body) | Moderate | Schools, warehouses, small venues | 2M 18-zone series |
| 33 zones | High (detailed body segments) | Low | Courthouses, government, casinos | 2M 33-zone series |
| 55–90 zones | Very high (precise location) | Very low | Airports, high-security venues, prisons | 2M 90-zone series |
Higher zone count also enables side-panel detection — the ability to distinguish whether a metal object is on the left or right side of the body, which speeds secondary screening significantly.
| Application | Recommended Zone Count | Key Requirement | Throughput Need |
|---|---|---|---|
| K-12 schools | 18–33 zones | Fast clearance to avoid arrival bottlenecks; low staff burden | 600–1,200 students/hr |
| Courthouse / government | 33–55 zones | High sensitivity for small knives; integration with ID logging system | 200–400 persons/hr |
| Stadium and arena | 33–90 zones | High throughput at gates; weather-rated for outdoor use | 1,500–3,000 persons/hr (per lane) |
| Casino / gaming | 33–55 zones | Side-panel discrimination; quiet alarm for discreet operation | 200–600 persons/hr |
| Corporate HQ / office | 18–33 zones | Professional appearance; visitor management integration | 300–800 persons/hr |
| Corrections / prison | 55–90 zones | Sensitivity calibrated for cell phone and shank detection | 100–300 persons/hr |
| Outdoor events | 18–33 zones (outdoor-rated) | IP55+ rating for rain; battery or generator power option | 800–1,500 persons/hr |
Not all walkthrough metal detectors are weather-rated. Standard indoor units are designed for controlled environments — office lobbies, courthouses, school hallways. Outdoor events and temporary checkpoints require IP55 or IP65-rated enclosures that prevent water ingress and protect electronics from dust and temperature extremes.
Key distinctions for outdoor installations:
A North Texas school district deployed walkthrough metal detectors at three high school campuses following a district-wide security upgrade. The district required simultaneous screening of 850-1,100 students per campus during a 20-minute arrival window — a throughput challenge that rules out low-zone units with high false alarm rates.
2M Technology supplied and installed 33-zone walkthrough metal detectors at each campus with two lanes per school. The detector sensitivity was calibrated for the student population to allow standard items (keys, belt buckles, medical devices) without alarm, while maintaining detection of knives larger than 3 inches and firearms. Average clearance time per student dropped from 8 seconds (previous single-lane setup) to 4 seconds per student across two lanes. No incidents of students bypassing screening were recorded in the first 90 days of operation.
Sensitivity calibration is the most common operational challenge with walkthrough metal detectors. Set too high, the system alarms on keys, belt buckles, and underwire bras, creating long queues and operator frustration. Set too low, threats are missed.
Modern walkthrough detectors solve this with per-zone sensitivity adjustment. Each zone can be calibrated independently. For example:
2M Technology provides factory calibration pre-shipment and on-site calibration support as part of every installation project.
Walkthrough metal detectors used in U.S. government and transportation security environments must meet detection standards set by federal agencies. Key standards include:
Zone count refers to how many horizontal detection bands span the tunnel. An 18-zone unit provides moderate precision — it can identify the general body segment where metal is located (head/upper body vs. mid-body vs. lower body). A 33-zone unit adds more bands, enabling more precise threat location (left hip, right ankle) and significantly fewer false alarms from common items like belt buckles and keys. For schools and courthouses, 33 zones is the practical minimum for reliable operation.
Only models with IP55 or higher enclosure ratings should be used outdoors. Standard indoor walkthrough detectors are not protected against rain and dust and will malfunction in outdoor conditions. 2M Technology stocks outdoor-rated walkthrough metal detector models for stadium gates, festival entries, and temporary outdoor checkpoints. Operating temperature range is also important — outdoor models should handle -20 to +60 degrees C for Texas conditions.
Yes. A complete primary screening lane pairs a walkthrough metal detector with an X-ray baggage scanner — persons walk through the metal detector while their bags pass through the X-ray conveyor simultaneously. 2M Technology designs and installs complete screening lane configurations including both components.
The rule of thumb is one detector lane per 500 students if screenings are staggered by arrival schedule, or one lane per 300 students if all students arrive simultaneously. Most high schools with 1,000-2,000 students use two to four lanes distributed between main entrance and secondary entrances. 2M Technology can provide a layout recommendation based on your campus population, physical entry points, and arrival schedule.
No. Walkthrough metal detectors only detect metallic objects. Ceramic knives, plastic weapons, and most drugs will not alarm a standard WTMD. For applications requiring non-metallic threat detection, the solution is body imaging (AIT/backscatter x-ray, as used in airports) or physical pat-down. Some facilities use both a WTMD for metal detection and a separate detection layer for organics and non-metals.
A single-lane walkthrough metal detector with one trained operator can clear 600-1,000 persons per hour under normal conditions. High-zone units (55-90 zones) with side-panel discrimination enable faster secondary screening, effectively increasing overall lane throughput by reducing false-alarm pat-downs. For stadium and arena gates requiring 2,000+ persons per hour, multiple parallel lanes are required. 2M Technology designs multi-lane configurations for high-volume venues.
Texas Security License B15309
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