FLIR SR-324 Analog Fixed Thermal Camera

FLIR SR-324 Analog Fixed Thermal Camera

Overview

The FLIR SR-324 is a fixed analog thermal imaging camera designed for long-range perimeter surveillance and threat detection. Equipped with a 19mm lens, the SR-324 delivers continuous thermal monitoring in total darkness and through obscured visibility conditions. This analog thermal camera integrates into existing analog video infrastructure and provides radiometric data for temperature analysis and anomaly detection across outdoor security deployments.

When this is the correct choice

The SR-324 is the right choice when you need proven analog thermal imaging in high-security perimeter applications. It excels in environments where network infrastructure is limited, where radiometric thermal data is required for forensic analysis, or where integration into legacy analog surveillance systems is necessary. Select the SR-324 for outdoor deployments requiring 24/7 monitoring independent of visible light, such as border protection, critical infrastructure monitoring, or facility perimeter defense.

When to choose a different model

If your deployment requires network-based video management, cloud connectivity, or edge analytics, consider IP-based thermal cameras instead. The SR-324's analog architecture does not support ONVIF, networked metadata, or remote firmware updates. For applications requiring higher resolution or integration with modern VMS platforms, evaluate thermal network camera alternatives.

Optics and field of view

The SR-324 features a fixed 19mm thermal lens, optimized for long-range detection and identification of heat signatures at distance. The 19mm focal length provides a narrower field of view compared to wider thermal lenses, enabling operators to monitor extended perimeter zones and detect intrusion attempts across open terrain. The fixed lens design eliminates focus drift and maintains consistent thermal imagery throughout the operational lifespan.

Imaging performance and low light

As a thermal imaging camera, the SR-324 operates entirely on infrared radiation and delivers imaging performance independent of ambient light. The camera detects thermal energy (heat) emitted from objects and generates video output regardless of darkness, fog, rain, or dust conditions. Thermal imaging provides superior detection range and signature discrimination compared to visible-light cameras in obscured or nighttime environments. The SR-324 produces radiometric data suitable for temperature trending, hotspot identification, and thermal anomaly alerting.

Analytics and edge capabilities

The SR-324 is a fixed analog thermal camera without onboard analytics or edge processing capabilities. Video analysis and alarm generation occur at the receiving end (analog DVR or video management appliance). Integrators can implement thermal threshold detection, perimeter crossing alerts, and heat signature analytics at the recording and management layer using compatible DVR firmware or external thermal analytics software.

Video encoding and streaming

The SR-324 outputs analog composite video (CVBS) and does not perform digital encoding. Video is transmitted over coaxial cable to analog DVR or hybrid analog/IP video management systems. Analog output ensures compatibility with legacy surveillance infrastructure and eliminates network bandwidth consumption. If digital streaming or network integration is required, the analog video signal must be digitized and encoded at the DVR or encoder appliance.

Network and security

The SR-324 is an analog thermal camera without network connectivity, TCP/IP interfaces, or cybersecurity attack surface. The camera communicates only via analog video output over coaxial cabling. Network-based threats, firmware exploits, and remote compromise vectors are not applicable to this analog architecture. Video security depends on physical access control to the analog signal path and the security posture of the receiving DVR appliance.

Environmental and durability ratings

The SR-324 is engineered for outdoor thermal surveillance applications. The camera is built to withstand environmental stress and is suitable for continuous exterior deployment. Consult the technical specifications for exact IP rating, operating temperature range, and weatherproofing details to confirm compatibility with your deployment climate and mounting location.

Power and installation notes

The SR-324 requires 12 VDC power input for thermal sensor and lens operation. Power is supplied via power supply or 12V camera power modules integrated into DVR appliances. Analog video output and power are routed over separate cabling to the recording appliance. Install the SR-324 on suitable outdoor mounting hardware (wall, pole, or bracket) and secure coaxial video and power runs in conduit or protected routing to avoid signal degradation and weather damage.

What is included

Contact us for package details.

Ted Perry

I have evaluated the FLIR SR-324 during thermal perimeter surveillance planning for a multi-site critical infrastructure client. This analog thermal camera brings proven radiometric thermal imaging to installations where network infrastructure is not yet deployed or where analog DVR systems are the established backbone. The 19mm lens delivers the long-range detection signature your perimeter teams expect from thermal technology, without the integration complexity of IP cameras.

Technical Highlights:

• Analog thermal output: Radiometric thermal imaging transmitted over CVBS composite video; no network encoding or IP dependency.
• Fixed 19mm lens: Purpose-built focal length for extended outdoor perimeter monitoring and heat signature identification at distance.
• 12 VDC power: Simple power supply requirement compatible with standard analog camera power distribution and DVR appliances.

Deployment Considerations:

• Verify your DVR appliance supports analog thermal video input; not all standard analog DVRs properly preserve radiometric thermal data in recording.
• Plan coaxial run lengths carefully—longer cable runs may require active balun amplification to maintain image clarity on the DVR display.
• Position the SR-324 on a stable outdoor mount away from heat-emitting HVAC discharge, equipment, or reflective surfaces that may interfere with thermal scene content.

The SR-324 is a reliable choice when thermal imaging is non-negotiable and analog infrastructure is your deployment reality. It removes the guesswork from perimeter threat detection and integrates cleanly into existing security architectures.