SIG SAUER ECHO CV25 Thermal Clip-On 1-8x25mm

The SIG SAUER ECHO CV25 is a thermal clip-on optic designed to mount ahead of a daytime optic to provide thermal imaging capability without removing familiar zero. It pairs a 640x512 LWIR core with a compact form factor and a quick-detach mounting system for rapid deployment. BDX 2.0 compatibility and a removable 18650 rechargeable battery support extended field use and digital integration.

Key Specifications

• The magnification range is 1–8x.
• The objective lens diameter is 25 mm.
• The thermal core resolution is 640x512.
• The thermal sensor frame rate is 50 Hz.
• The thermal core sensitivity is reported as <20 mK.
• The removable power source is a 18650 lithium-ion rechargeable battery.
• The reported runtime is 9+ hours on a single battery (manufacturer claim).
• Includes BDX 2.0 connectivity for configuration and streaming via the app.
• Mounting uses an industry-standard quick-disconnect 1.535" centerline attachment.
• The microdisplay is listed as a 1024x768 AMOLED panel in manufacturer material.

Engineered for users who require thermal capability without replacing their primary optic, the ECHO CV25 offers a balance of compact size, digital features, and extended runtime. Its combination of a VGA LWIR core, app-enabled features, and a QD mount make it suitable for observation and low-light identification tasks where rapid attachment and familiar eye relief are important. The modular battery and durable IP67-rated construction support extended field use.