FLIR SR-625 Analog Fixed Thermal Camera 25mm

FLIR SR-625 Analog Fixed Thermal Camera

Overview

The FLIR SR-625 is an analog fixed thermal imaging camera designed for stationary surveillance and monitoring applications where thermal detection is required. This camera features a fixed 25mm lens configuration, making it suitable for medium-range thermal observation in indoor and outdoor environments. The SR-625 operates as a traditional analog video output device, integrating into existing analog surveillance infrastructure without requiring network connectivity or advanced IP-based systems.

When this is the correct choice

The SR-625 is the right choice for facilities requiring thermal surveillance on analog CCTV systems. This includes perimeter monitoring, equipment temperature monitoring, process control verification, and intrusion detection in complete darkness or fog where visible-light cameras fail. Organizations with established analog DVR infrastructure benefit from straightforward integration without costly network upgrades. Fixed mounting in warehouse entries, loading docks, fence lines, and industrial equipment areas where thermal signatures provide critical detection capability makes this camera a practical addition to legacy systems.

When to choose a different model

If your facility requires network integration, cloud connectivity, or advanced video analytics, an IP-based thermal camera will serve better. Analog systems lack remote viewing over standard networks and cannot support cloud archival or AI-powered detection without additional encoding hardware. For applications requiring pan-tilt-zoom capability or multi-directional coverage, a PTZ thermal camera is more appropriate. If you need visible-light video combined with thermal in a single device, a hybrid dual-sensor system should be evaluated.

Optics and field of view

The SR-625 is equipped with a fixed 25mm thermal lens. This focal length provides a defined, medium field of view suitable for distances where thermal gradient detail is important—typical installations position this camera 30 to 50 feet from target areas. The fixed lens eliminates need for motorized focus or zoom adjustment, reducing maintenance and ensuring consistent performance over time. Lens selection should match your deployment distance: confirm sight lines and expected target size before installation.

Imaging performance and low light

Thermal imaging operates independent of visible light, making the SR-625 equally effective in complete darkness, fog, smoke, or daylight. Unlike conventional cameras that rely on illumination, thermal sensors detect infrared radiation emitted by warm objects, enabling true day-and-night surveillance without artificial lighting. Performance in thermal imaging is characterized by temperature sensitivity and spatial resolution rather than lux ratings, making it ideal for perimeter security and equipment monitoring where conventional night vision is ineffective.

Analytics and edge capabilities

The SR-625 operates as a pure thermal imaging sensor without built-in analytics processing. Video analysis, object detection, and alarm triggering are performed downstream by DVR firmware or external analytics systems. This simplicity reduces cost and complexity while maintaining reliability for straightforward monitoring applications. Advanced analytics such as temperature threshold alarms or motion detection must be configured within your DVR or control system.

Video encoding and streaming

As an analog camera, the SR-625 outputs standard analog video signals compatible with traditional CCTV infrastructure. No video compression, streaming protocols, or bandwidth management is required. Video quality is consistent and deterministic, with no latency or network dependency. Recording is handled directly by analog DVRs using standard coaxial cabling—no network configuration, DHCP, or IP assignment needed.

Network and security

The SR-625 is a standalone analog device with no network interface, IP address, or data transmission capability. Security is inherent: no hacking surface, no firmware exploits, no credential management. The camera is purely a video source feeding coaxial cable to your DVR. This eliminates cybersecurity risk at the camera level, though your DVR and recording infrastructure should maintain standard IT security practices.

Environmental and durability ratings

Thermal cameras are typically housed in rugged, sealed enclosures rated for indoor and outdoor use. Confirm mounting location and environmental exposure (rain, dust, temperature extremes) with installation requirements. Fixed cameras in weathered outdoor locations should be mounted with appropriate conduit protection and housing drainage.

Power and installation notes

The SR-625 requires electrical power via standard power supply connections typical to thermal imaging cameras. Power requirements and cable entry specifications depend on the specific housing and power unit supplied. Installation involves secure mounting to a fixed bracket or structure, alignment of the 25mm lens toward your target area, and connection of the analog video output to your DVR BNC input. Coaxial cabling supports runs up to 300 feet with minimal signal loss; longer runs may require signal amplification.

What is included

Contact us for package details.

Karl Wilson

The FLIR SR-625 is a straightforward analog thermal imaging solution for integrators working with existing CCTV infrastructure. If your client's DVR supports analog BNC input and thermal detection is a requirement, this camera eliminates the complexity and cost of IP thermal systems while delivering persistent thermal surveillance capability. The SR-625 works equally well in daylight and complete darkness, making it invaluable for perimeter intrusion detection and equipment monitoring where conventional cameras struggle.

Technical Highlights:

• Thermal imaging sensor: Independent of visible light; operates in darkness, fog, and adverse weather
• Fixed 25mm lens: Medium-range field of view; no motorized focus adjustment required
• Analog video output: Direct integration into coaxial CCTV systems; no network overhead
• Stationary mount: Secure positioning for consistent coverage of fixed target areas

Deployment Considerations:

• Confirm your DVR accepts analog BNC video input before ordering; older systems may use different connectors
• Position the camera with clear line of sight to your monitoring area; thermal imaging cannot penetrate walls or solid barriers
• Use grounded coaxial cable and ensure proper conduit protection in outdoor installations to prevent EMI and water ingress
• Verify power supply specifications and run conduit or cable trays for aesthetic and weather-resistant installation

The SR-625 is ideal for facilities transitioning to thermal monitoring without replacing their entire infrastructure. It's particularly effective for after-hours perimeter security, warehouse intrusion detection, and process temperature monitoring where a reliable, maintenance-free thermal image is more valuable than visible light. Integrate this camera into your existing analog system for immediate thermal surveillance coverage.