Product Overview
For perimeter security and fire risk monitoring in environments where standard visible-light cameras fall short, the Hikvision HM-TD2638-25/G0/T1Y offers a thermal and optical bi-spectrum bullet camera built for demanding outdoor and industrial installations. Featuring a 25mm thermal lens paired with an optical imaging channel, this camera supports longer-distance heat-based detection alongside visible scene verification in a single fixed unit. Equipped with human and vehicle detection, it helps focus alarm activity on relevant security targets rather than environmental movement. It also integrates fire prevention alarm support, which assists in identifying abnormal heat conditions at warehouses, storage yards, substations, and industrial facilities where early warning matters. This model is well suited to perimeter fence lines, access roads, logistics yards, construction sites, utilities infrastructure, and remote monitoring points where optical-only cameras may be compromised by darkness, smoke, glare, or fog.
Key Capabilities
Thermal and Optical Bi-Spectrum Imaging
Combining thermal detection with an optical video channel in one bullet camera body allows operators to detect heat signatures and then use visible imagery to verify the event, supporting a more informed response without needing 2 separate cameras.
Human and Vehicle Detection
Built-in human and vehicle detection classifies detected targets from the thermal channel, helping to reduce alarm activity triggered by animals, vegetation movement, or other irrelevant scene changes across perimeter and yard monitoring zones.
Fire Prevention Alarm Support
The HM-TD2638-25/G0/T1Y supports fire prevention alarm functionality, enabling early detection of abnormal heat build-up in areas such as material storage yards, equipment bays, and industrial processing zones where temperature anomalies carry operational or safety significance.
25mm Thermal Lens for Longer Detection Ranges
The 25mm thermal lens provides a narrower, more focused thermal field of view suited to longer observation distances along fence lines, driveways, or facility boundaries where a wider lens would lack adequate range for target detection.
Low-Visibility and Adverse Condition Detection
Thermal imaging operates on heat rather than visible light, allowing this camera to support detection in darkness, heavy fog, smoke, glare, and low-contrast scenes where a conventional optical camera would produce insufficient image detail for reliable identification.
Best For
- Industrial Perimeter Monitoring: Suitable for fence lines, gates, loading access points, and boundary roads where thermal detection supports after-hours or low-visibility intrusion detection.
- Fire Risk and Heat Anomaly Monitoring: Practical for warehouses, outdoor material storage yards, and equipment areas where abnormal temperature conditions should trigger early alarm response.
- Utility and Critical Infrastructure Sites: A sound choice for substations, water treatment facilities, communications infrastructure, and remote monitoring points requiring heat-based detection rather than visible-light coverage alone.
- Construction and Logistics Yards: Useful for sites with heavy equipment, fuel storage, and high-value material stockpiles where both intrusion detection and abnormal heat monitoring are operationally relevant.
- Challenging Outdoor Environments: Best suited where smoke, glare, darkness, or dust regularly reduces the effectiveness of standard optical surveillance across large open areas.
Why Choose the HM-TD2638-25/G0/T1Y
The HM-TD2638-25/G0/T1Y addresses a genuine gap in standard perimeter camera deployments by combining thermal heat detection with optical scene verification in one fixed bullet camera. A standard optical camera cannot detect intrusion through heavy fog or total darkness the way thermal imaging can, and a thermal-only unit lacks the visual context operators need for event confirmation. This model provides both in a single installation point. The 25mm thermal lens is specifically suited to longer observation distances along fences and yard boundaries. Human and vehicle detection from the thermal channel focuses alarm output on relevant targets, and fire prevention alarm support adds a layer of heat-risk monitoring that goes beyond basic intrusion detection. Available through Security Wholesalers, the HM-TD2638-25/G0/T1Y should be specified after confirming target detection distance, scene width, recorder compatibility, alarm configuration, and whether fire prevention monitoring forms part of the site safety strategy. Please note this product carries a 70-day lead time.
Buyer Decision Tips
Lens and Detection Distance: The 25mm thermal lens provides a narrower field of view better suited to longer perimeter runs than wide, close-range scenes. Before ordering, confirm the required detection distance and coverage width for each camera position. A shorter focal length lens would be more appropriate for monitoring wide open areas at close range. Also note that this product has a 70-day lead time, so plan procurement timelines accordingly for project schedules.
Fire Prevention Compliance: The fire prevention alarm feature supports early heat anomaly detection as part of a broader site safety workflow. It should not be treated as a replacement for certified fire detection systems. Confirm with the site owner, project engineer, and relevant authorities whether thermal camera-based heat monitoring satisfies compliance requirements or whether it is intended as a supplementary monitoring layer alongside approved fire detection equipment.
Key Features & Technical Specifications
| Model |
HM-TD2638-25/G0/T1Y |
| Brand |
Hikvision |
| Product Type |
Thermal and optical bi-spectrum bullet camera |
| Imaging Technology |
Thermal imaging and optical imaging |
| Thermal Lens Focal Length |
25mm |
| Detection Capabilities |
Human and vehicle detection |
| Alarm Functions |
Fire prevention alarm support |
| Camera Housing |
Fixed bullet |
| Mounting Type |
Fixed outdoor bullet installation |
| Primary Application |
Perimeter intrusion detection, heat anomaly monitoring, fire prevention support, industrial and outdoor surveillance |
| Typical Installation Sites |
Warehouses, industrial sites, storage yards, substations, perimeter fence lines, construction sites, logistics hubs, utilities and critical infrastructure |
| Visibility Conditions |
Supports detection in darkness, fog, smoke, glare, and low-contrast outdoor scenes |
| Lead Time |
70 days – please allow for this lead time when planning procurement |
| Pre-Installation Checks |
Confirm target detection distance, thermal lens field of view, mounting height, alarm zone layout, recorder compatibility, power requirements, and environmental exposure before ordering |
Ideal Use Cases
Perimeter Fence Line Detection
The 25mm thermal lens supports longer-distance observation along fence lines, access roads, and boundary perimeters where human and vehicle detection from the thermal channel triggers alerts on actual security targets.
Industrial Fire Risk Monitoring
Fire prevention alarm support makes this camera relevant for sites with combustible materials, machinery, or fuel storage where early detection of abnormal heat build-up can support a site safety response workflow.
Warehouse and Yard Perimeter Security
Outdoor storage yards, loading zones, and warehouse perimeters benefit from thermal detection that continues to function in total darkness or when lighting conditions change between shifts.
Substation and Utility Monitoring
Utility facilities and electrical substations often require detection that is not disrupted by equipment glare, steam, or environmental conditions. The bi-spectrum design supports both heat-based detection and optical verification at these sites.
Low-Visibility Outdoor Surveillance
Where fog, smoke, dust, or night-time darkness limits what a standard camera can detect, thermal imaging continues to identify heat sources, with the optical channel providing visual context once an alarm is triggered.
Choosing the Right Model
- Choose this model if: The site requires a fixed thermal and optical bi-spectrum bullet camera with a 25mm thermal lens, human and vehicle detection, and fire prevention alarm support for longer-distance perimeter or industrial monitoring.
- Choose a different model if: The site needs a wide-angle thermal lens for close-range broad coverage, PTZ thermal tracking for large open areas, optical-only recording where thermal imaging is not required, or a standard fixed CCTV camera where scene visibility is adequate throughout all operating conditions.
- Check before ordering: Confirm required detection range, whether the 25mm focal length matches the coverage width needed at each mounting point, recorder compatibility with bi-spectrum cameras, alarm output configuration, environmental exposure rating suitability, fire prevention monitoring objectives, and site compliance obligations. Allow for the 70-day lead time in project scheduling.
FAQs
- What does bi-spectrum mean on the HM-TD2638-25/G0/T1Y?
Bi-spectrum means the camera uses 2 separate imaging systems in a single unit. The thermal channel detects heat signatures from people, vehicles, and abnormal temperature sources regardless of lighting. The optical channel captures visible scene detail, allowing operators to verify what the thermal channel has detected without needing a second camera at the same location.
- What is the 25mm thermal lens suited to?
A 25mm thermal lens has a narrower field of view than shorter focal lengths such as 7mm or 13mm, making it more appropriate for longer detection distances along fence lines, access roads, and perimeter boundaries. It is less suited to monitoring wide open areas at close range. The correct lens should always be confirmed against the required detection distance and coverage width for each camera position.
- How does human and vehicle detection work on a thermal camera?
The thermal channel analyses heat signatures and classifies detected objects as human or vehicle based on their thermal profile and movement characteristics. This helps the system generate alerts specifically for relevant security targets rather than triggering on animals, tree movement, or other scene changes that do not indicate a genuine security event.
- Can the HM-TD2638-25/G0/T1Y replace a certified fire detection system?
No. The fire prevention alarm feature supports early detection of abnormal heat conditions as part of a broader site monitoring strategy. It is not a substitute for certified fire detection systems. Site designers and owners should confirm with relevant authorities and fire safety engineers whether thermal camera-based heat monitoring meets applicable compliance requirements or whether it is intended as a supplementary layer alongside approved systems.
- Where is this camera typically installed?
Common installation points include perimeter fence lines, industrial facility boundaries, warehouse loading areas, outdoor storage yards, substation perimeters, construction site access points, logistics hubs, and remote critical infrastructure locations. Placement should be planned around the required detection distance, the thermal lens field of view, mounting height, and the alarm zone layout specific to each site.
- Does thermal imaging work better than standard cameras in darkness?
In conditions of total darkness, heavy fog, smoke, dust, or strong glare, a standard optical camera depends on available or artificial light and may produce insufficient image detail for reliable detection. Thermal imaging detects heat rather than light and continues to function across these conditions, which is why it is used in perimeter and industrial applications where visibility cannot be guaranteed at all hours.
- What recorder or system is compatible with this camera?
Recorder and NVR compatibility should be confirmed with your system integrator or supplier before purchase. Not all NVRs support bi-spectrum thermal cameras natively, and alarm configuration for fire prevention and human or vehicle detection rules may require specific recorder firmware or platform support. Confirming compatibility before ordering avoids integration issues on installation day.
- Is there a lead time for this product and where is it available?
Yes. The HM-TD2638-25/G0/T1Y carries a 70-day lead time, which should be factored into project timelines and procurement planning well in advance of required installation dates. This model is part of the Security Wholesalers range and is stocked for professional thermal surveillance installations across industrial, utility, and perimeter security projects.
Additional Information
