33-Zone Walk-Through Metal Detector (IP54, 60 ppm Throughput)
Physical & Entrance Security · SSAL supplies 33-zone walk-through metal detectors with 60 ppm throughput, Ø2mm steel ball sensitivity, multi-frequency operation, LED zone display and IP54 for enterprise security checkpoints.
Category
Physical & Entrance Security
Author
SSAL Expert Team
Updated
2026-05-14
Topics
walk-through metal detector, WTMD
Product Summary
Pinpoint Location. 60 Persons Per Minute. Immune to Mobile Phones and Pacemakers.
A walk-through metal detector that generates constant false alarms from mobile phones, keys, and belt buckles creates a checkpoint bottleneck that security managers either endure (at the cost of productivity and user frustration) or disable (at the cost of actual security). The 33-zone WTMD addresses this fundamental problem with 33 independently adjustable vertical detection zones and multi-frequency operation that distinguishes genuine weapon-grade metal objects from benign everyday items.
SSAL deploys 33-zone walk-through metal detectors at government building entrances, bank lobbies, court complexes, hotels, industrial facilities, and educational institutions across Bangladesh — providing personnel screening throughput that accommodates peak entry periods without sacrificing detection sensitivity.
Key Features
- 33 Independent Detection Zones: The passage aperture is divided vertically into 33 independently tunable zones from ankle to head — each zone's sensitivity is calibrated separately, allowing high sensitivity in weapon-carrying zones (waist, torso) with lower sensitivity in high-false-alarm zones (shoe area)
- 60 Persons Per Minute Throughput: 1-second passage cycle time enables screening of 60 persons per minute per lane — a single WTMD unit processes up to 3,600 persons per hour, sufficient for all but the largest government building rush periods
- Detects Steel Ball Ø2mm: Sensitivity benchmark — a detector that reliably finds a 2mm steel ball finds concealed blades, handgun frames, ammunition, and other ferrous threat objects with high confidence
- 6–10kHz Multi-Frequency Operation: Multi-frequency waveform excitation discriminates between the magnetic signature of ferrous metal weapons and the metallic components of harmless items (phone chassis, keys, coins) — reducing false alarm rate by up to 80% versus single-frequency systems
- Front and Rear LED Zone Display: Dual-side LED zone indicator panels — one facing the person being screened, one facing the security operator — display which vertical zone generated the alarm; security officer directs hand-held metal detector to the indicated zone only
- Audio + LED Alarm: Audible alarm (adjustable volume) and LED zone illumination trigger simultaneously on detection — visible alarm indication is essential in noisy lobby environments
- Mobile Phone Immunity Mode: Configurable operating parameter that desensitises the WTMD to the metallic signature profile of typical mobile phone chassis and accessories — dramatically reduces the most common source of false alarms in commercial and government deployments
- Pacemaker-Safe Operation: Operating frequency and field strength are within IEC 61000 limits for implantable cardiac device safety — WTMD can be safely used at standard separation distances (1m from device) by persons with pacemakers; signage and bypass lane option recommended for full compliance
- IP54 Rated Structure: Protected against dust and water splash from any direction — suitable for covered outdoor installations at factory gates, open-air event venues, and building entrance canopies exposed to Bangladesh's monsoon conditions
- Lightweight Folding Structure: Modular panel construction disassembles to portable panels for transport and temporary deployment — each panel weighs under 15kg; full unit deploys in under 10 minutes by two persons
- Digital Display Console: On-board display shows zone sensitivity settings, alarm count, pass count, alarm rate statistics, and operating mode — provides operational data for shift reports and security management dashboards
Technical Specifications
| Parameter | Specification |
|---|---|
| Detection Zones | 33 independent vertical zones |
| Throughput | 60 persons/minute |
| Sensitivity (Steel Ball) | Detects Ø2mm steel ball |
| Operating Frequency | 6–10kHz multi-frequency |
| Frequency Channels | ≥16 selectable channels (anti-interference) |
| Alarm Mode | Audio alarm + LED zone illumination (front and rear panels) |
| Alarm Volume | Adjustable (50–90 dB at 1m) |
| Zone Display | LED matrix — front panel + rear panel (operator-facing) |
| False Alarm Rate | <1% (with mobile phone immunity mode, typical deployment) |
| Passage Aperture (W×H) | 850mm × 2,050mm (clear passage) |
| Passage Depth | 500mm |
| Operating Power | 100–240VAC, 50/60Hz |
| Power Consumption | ≤50W (operating) |
| Operating Temperature | −20°C to +55°C |
| Humidity | 5–95% RH, non-condensing |
| Ingress Protection | IP54 |
| Panel Construction | ABS polymer panels over steel frame |
| Assembly | Tool-free snap-fit panel assembly |
| Assembled Dimensions (W×D×H) | 915mm × 600mm × 2,250mm (approx.) |
| Unit Weight | ≈90kg assembled |
| Certifications | CE, FCC, RoHS; meets IEC 60335, IEC 61000 |
Typical Applications
- Government Ministry & Secretariat Entrance: Multiple WTMD lanes at main entrance — 33-zone sensitivity discriminates weapon-concealment zones while tolerating routine carry-items; dual LED display allows security officers to direct targeted secondary screening efficiently
- Bank Branch & Head Office Lobby: Single-lane WTMD at main entrance manages customer entry alongside the X-ray baggage scanner — combined checkpoint provides complete personnel and bag screening without requiring full security officer bag inspection
- Court Complex & Judicial Building: Higher-security judicial environment benefits from 33-zone granularity; zone-specific alarm allows magistrates to identify precisely where on a person a metal object is located before manual secondary search
- Hotel & Convention Centre: Large-aperture passage accommodates guests in formal attire including metal accessories; multi-frequency operation reduces false alarms from business travellers' standard carry items
- Industrial Facility Exit Screening: Deployed at factory and bonded warehouse exit points for pilferage prevention; high sensitivity detects metal components, tools, and raw material hidden under clothing
- Education Institution — Examination Hall: Prevents electronic device smuggling into examination venues; 33-zone display identifies the body location of concealed devices for targeted secondary search
Compatibility & Integration
Walk-through metal detectors operate as standalone units or integrate with security management systems via RS-232/RS-485 or Ethernet output — transmitting alarm events (zone, timestamp, count) to central security management software. SSAL integrates WTMD alarm events with access control management software to generate a combined checkpoint security log. In multi-lane deployments, a single security management workstation monitors all WTMD units simultaneously.
SSAL Supply & Support
Smart Safety & Automations Ltd. supplies, installs, and trains security personnel on walk-through metal detector operation as part of complete checkpoint security solutions. SSAL provides sensitivity calibration certification at commissioning, documenting achieved detection performance against specified threat objects. Annual Maintenance Contracts include sensitivity re-certification, zone calibration, and frequency channel reselection to address any new sources of electromagnetic interference at the site. Operator refresher training is available as part of AMC or as a standalone service.
Request a Quote
High-throughput, high-accuracy personnel screening. Contact SSAL for your checkpoint design.
- Web: www.smartsafety.com.bd
- Email: info@smartsafety.com.bd
- Phone: +880-XXXX-XXXXXX
- Request a Quote: www.smartsafety.com.bd/quote
Specifying This Product?
Our engineers will confirm the right configuration, accessories, and installation scope for your environment.
- 48-hour site survey
- Free consultation
- 24/7 priority support