Sig Sauer ECHO CV25 — 640×512 thermal clip-on

How far you can see a person

80 m make out detail130 m tell what it is521 m spot it

501002005001k2k5k m

Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Sig SauerClip-on · 640-class

Sig Sauer ECHO CV25

Approx. price: ~$4,000
Sensor: 640×512 · 12 µm
Lens: 25 mm · 1×
Weight: 18.8 oz

Price and availability on Sig Sauer’s site may differ.

Best for

Keeping your day scope and its zero while adding thermal at night

01Specifications

As published by Sig Sauer. Sources: sigsauer.com ECHO CV25 operator's manual PDF (spec table: 1-8x, FOV 17.6 deg, 640x512 12 um 50 Hz, <20 mK, 1024x768 AMOLED microdisplay, 9+ h on one 18650, IP67, 4.96 in, 126 mm, 18.8 oz, 535 g without battery; dealer copy rounds FOV to 17 deg), sportsmans.com SKU SOEC22100 ($3,999.99, out of stock on the day read; sigsauer.com product page 403 to fetchers).

Sensor: 640×512
Pixel pitch: 12 µm
NETD: <20 mK
Refresh rate: 50 Hz
Lens: 25 mm
Base magnification: 1×
Digital zoom: up to 8×
Field of view: 17.6° horizontal
Display: 1024x768 AMOLED
Run time: 9 h
Battery type: 18650
Weight: 18.8 oz
Length: 5″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: Infinite Guarantee
Approx. price: ~$4,000

02Pros and cons

From the published specs, not owner reports.

For it

640×512 sensor, 3× the detail of an entry-level 384
Sensitive sensor that picks out small heat differences on humid or rainy nights (104th-best of 285 that publish it)
Takes 18650 batteries you can swap in the field
9 h of battery, 81st-longest of 344 here
Waterproof (IP67), survives a dunking
Records video and connects to a phone app

Against it