Land VIRALERT 3 Infrared Thermal Imaging Fever Screening System

Overview

The Land VIRALERT 3 Infrared Thermal Imaging Fever Screening System is a purpose-engineered, regulatory-aware solution for non-contact human skin temperature assessment in high-traffic public and occupational environments. Developed by AMETEK Land — a global leader in industrial temperature measurement with over 70 years of radiometric expertise — the VIRALERT 3 applies calibrated infrared radiometry to detect elevated skin temperature (EST) as a preliminary physiological indicator. It operates on the principle that infrared radiation emitted from the medial canthus (inner eye corner) correlates strongly with core body temperature under controlled environmental conditions. The system integrates a high-resolution uncooled vanadium oxide (VOx) microbolometer thermal imager with a synchronized CMOS visible-light camera, enabling simultaneous thermal and visual image capture. Its architecture is designed for installation at building entrances, security checkpoints, and access control zones where rapid, passive, and socially distanced screening is operationally required. Unlike spot pyrometers or handheld thermometers, the VIRALERT 3 delivers continuous, real-time thermal video streams with automated facial localization — eliminating operator dependency and minimizing throughput bottlenecks.

Key Features

• Fixed-point blackbody reference source (38.0 °C ± 0.2 °C) integrated into the optical path for continuous in-situ calibration stability
• Automated facial detection algorithm optimized for frontal pose estimation and medial canthus targeting — compliant with ISO/TR 13154:2017 guidance for fever screening systems
• Dual-sensor fusion: 1280 × 960 IR resolution paired with 1280 × 960 visible-light imaging at 12 fps for contextual verification and auditability
• Real-time thermal overlay with dynamic color mapping; abnormal skin temperatures (>37.5 °C default threshold) flagged in red with configurable alarm logic
• Audio-visual alerting system (LED indicator + programmable tone) synchronized with thermal event detection
• USB-powered thermal core and blackbody module; minimal infrastructure requirements — compatible with standard Windows-based host PCs
• Robust thermal drift compensation across ambient operating range (10 °C to 50 °C), validated per IEC 62942-1:2020 test protocols

Sample Compatibility & Compliance

The VIRALERT 3 is intended for use in ambient indoor environments with stable air temperature and low air movement — consistent with ISO/TR 13154:2017 recommendations for EST screening. It is not a diagnostic medical device (per FDA 21 CFR §809.3 or EU MDR Annex XVI), nor does it replace clinical thermometry. Rather, it functions as a triage-level tool for identifying individuals requiring secondary evaluation. The system supports GLP-aligned operational documentation: all thermal frames are timestamped, geotagged (if enabled), and stored with metadata including ambient humidity, operator ID, and blackbody status. Calibration certificates traceable to NPL (UK) or NIST (US) standards are available upon request. The device conforms to electromagnetic compatibility (EMC) requirements under EN 61326-1:2013 and carries CE and UKCA markings for conformity with the Radio Equipment Directive (RED) and Electromagnetic Compatibility Directive.

Software & Data Management

The VIRALERT 3 operates via Land’s proprietary VIRALERT Control Suite — a Windows-native application supporting both manual and fully automated deployment modes. Software features include configurable temperature thresholds, multi-zone ROI definition, customizable alarm escalation (email/SNMP integration optional), and encrypted local database logging (SQLite format). All thermal and visible frames are saved in lossless TIFF format with embedded EXIF metadata. Audit trails record user login/logout events, parameter changes, and alarm activations — supporting 21 CFR Part 11 readiness when deployed with validated IT infrastructure. Export options include CSV (summary statistics), PDF (daily reports), and DICOM-compliant thermal datasets for integration into enterprise health monitoring platforms. Remote firmware updates and configuration push are supported over secure TLS 1.2 connections.

Applications

• Entrance screening at corporate campuses, manufacturing facilities, and logistics hubs to enforce occupational health protocols
• Public sector deployments: municipal buildings, courthouses, and immigration checkpoints requiring passive biometric-aware access control
• Educational institutions: universities and K–12 schools implementing layered infection prevention strategies
• Healthcare perimeters: outpatient clinics, dialysis centers, and long-term care facilities managing visitor risk stratification
• Transportation nodes: airport landside terminals, metro stations, and seaport passenger processing areas
• Event management: temporary screening at conferences, exhibitions, and sporting venues under ISO 22320 emergency response frameworks

FAQ

Is the VIRALERT 3 classified as a medical device?
No. It is a Class I non-invasive thermal imaging system intended for elevated skin temperature screening only — not clinical diagnosis. Regulatory positioning aligns with FDA Enforcement Policy for Thermal Imaging Systems (March 2020) and EU Commission Notice SANTE/11050/2020.

What environmental conditions are required for reliable operation?
Ambient temperature must be maintained between 18 °C and 28 °C, relative humidity below 70% RH, and no direct sunlight or HVAC drafts on the subject pathway. Acclimatization time of ≥15 minutes is recommended prior to screening.

Can the system integrate with existing access control or HRIS platforms?
Yes — via RESTful API (JSON over HTTPS) and optional OPC UA gateway modules. Pre-built connectors are available for Lenel, Genetec, and Avigilon systems.

How often does the blackbody require recalibration?
The integrated 38.0 °C reference source is factory-calibrated and drift-stabilized; annual verification against an accredited secondary standard is recommended per ISO/IEC 17025.

Does the system support multi-language UI and reporting?
Yes — English, Spanish, French, German, Mandarin, and Arabic language packs are included. Report templates comply with ISO 8601 date formatting and Unicode UTF-8 encoding.