Detection vs. Identification Range in Thermal Scopes | GoingDark Australia

One of the most common questions we hear at GoingDark is: “What is the effective detection and identification range of a thermal scope?”

It’s a critical consideration for any shooter or hunter looking to invest in thermal technology, and the answer isn’t always as straightforward as a single number on a spec sheet.

Detection vs. Identification: What’s the Difference?

• Detection Range means the maximum distance at which a thermal scope can pick up the heat signature of an object (like an animal). This lets you know something is out there, but not necessarily what it is.
• Identification Range is the distance at which you can clearly distinguish and identify the type of animal or object you’re looking at (e.g., pig vs. deer).

What Affects These Ranges?

A few key factors influence how far you can reliably detect and identify animals:

• Sensor Resolution: Higher resolution (e.g., 640x480) provides more detail, improving both detection and identification distances.
• Lens Size (Objective Lens): Larger lenses gather more thermal energy, extending range.
• Environmental Conditions: Fog, rain, humidity, and ambient temperature can reduce performance.
• Target Size: Larger animals are detectable/identifiable at greater distances than smaller ones.
• Background Contrast: Animals stand out more against colder backgrounds.

Real-World Example Let’s take the NOCPIX QUEST H50R as an example:

• Detection Range: Up to 2500 metres (heat signature visible)
• Identification Range: Up to 800 metres (can reliably identify a pig, deer, or similar-sized animal)

Remember, these are ideal conditions. Real-world results can vary based on the factors above.

Pro Tip from Shaun "When comparing scopes, always look at both detection and identification ranges. Don’t be swayed by maximum numbers alone—focus on the range that matches your typical hunting scenario. If you’re mostly shooting within 300–400 metres, a unit with a strong identification range in that bracket is far more valuable than one that claims extreme detection at distances you’ll never use".

Want to know which model suits your needs? Get in touch with our team for tailored advice.