Pixfra Arc A604 Pro Ecology Thermal Imaging Monocular

Pixfra Arc A604 Pro Handheld Thermal Imaging Monocular

The Pixfra Arc A604 Pro pairs a 640×512, 12μm thermal sensor (<18mK NETD sensitivity) with a 4mm f/1.0 lens for a 102° field of view. It suits ecologists and conservationists who need to watch a wide area or work close to small, fast-moving subjects: bat surveys, roost monitoring, habitat observation and wider animal behaviour studies.

It detects heat sources up to 200m away and focuses down to a short minimum distance, so one device covers both wide-area scanning and close examination of insects, invertebrates and small mammals.

Video records continuously with sound in 30-minute clips to 32GB of internal storage, alongside still image capture. Mount it on a tripod for unattended recording of a roost or habitat, or hold it for spot checks, streaming the live view to the free Pixfra app for solo or group monitoring.

What people like:

Key features Built for ecology Survey specs Field of view Close focus Recording Compare the range FAQs What's included Learn more

---

Key features

• 102° horizontal field of view from a 4mm f/1.0 lens
• 640×512, 12μm thermal sensor
• <18mK NETD sensitivity
• Detects heat sources up to 200m away
• Short close-focus distance for close-up work
• Continuous video with audio, saved in 30-minute clips
• 32GB internal storage
• Two replaceable batteries, up to 6 hours each
• Live view on up to 4 devices via the free Pixfra app
• IP67 waterproof rating

Built for ecology and bat surveys

Watch the Whole Roost Exit

The 102° field of view takes in a whole building elevation from close range, so a bat leaving from any point stays in frame.

Examine Roosts Up Close

A short minimum focus distance opens up interior roost surveys and close examination of insects, invertebrates and small mammals.

Record Emergence Surveys Unattended

Mount it on a tripod, press record and leave it running through dusk, with continuous video saved to 32GB of internal storage.

Share the Live View

Stream the thermal feed to up to four phones or tablets at once with the free Pixfra app, so the whole survey team sees the same activity.

❮

❯

A604 Pro specs that matter on a bat survey

Emergence counts, roost checks and dusk-to-dawn monitoring each lean on a different part of the specification. Here is where the A604 Pro stands on each.

An ultra-wide 102° field of view

The A604 Pro's 4mm f/1.0 lens gives a 102° horizontal, 83° vertical field of view. On a thermal lens, field of view and detection range move in opposite directions: a shorter focal length widens the view and shortens the distance a heat source can be picked up at. The A604 Pro sits at the wide end of that scale.

In practice, that means covering a habitat, a barn interior or a whole roost exit in a single view, rather than panning across it and missing something between sweeps. The narrower 13mm lens on the Arc A613 Pro Ecology makes the opposite trade: it covers less of the scene, but detects heat sources out to 700m, so it suits open ground and longer survey distances.

Whole-scene coverage from the 4mm lens

Bats leaving a roost and animals crossing open ground move fast and rarely where you expect. On the A604 Pro, the 4mm lens holds the whole scene in one view, so there is less panning and fewer missed exits.

Built for close-up work too

A short close-focus distance is the other side of the same wide lens. It lets the A604 Pro handle survey work a longer-range device cannot: inspecting insects and invertebrates, observing small mammals non-invasively, or reading fine-scale heat patterns close up.

Short close-focus distance

A subject closer than a monocular's minimum focus is a blur, whatever the sensor. The A604 Pro focuses down to a short minimum distance, so interior roost checks and invertebrate work happen on the same device you scan with.

Continuous, unattended recording

The A604 Pro is tripod-mountable and records continuously to its 32GB of internal storage in 30-minute clips, complete with audio. Mount it, press record and leave it running for the full length of a survey, with the footage there to review afterwards.

• Tripod-mountable for hands-free operation
• Continuous MP4 video with audio, saved in 30-minute clips
• Built-in storage, so there is no memory card to manage
• Still image capture alongside video

Power for a full night's survey

The A604 Pro is supplied with two rechargeable, replaceable batteries, each giving up to 6 hours of operating time. Swap in the second when the first runs low, or recharge via USB-C from a standard power bank to keep a session going beyond that.

How does the A604 Pro compare to the rest of the Arc range?

The Arc A604 Pro trades detection range for field of view and close-focus distance. This is a deliberate optical trade-off: a short 4mm lens that sees wide and close cannot throw a thermal signature as far as a longer lens. The Arc A613 Pro Ecology and Arc A613 Ecology take the opposite trade-off, a 13mm lens that gives up field of view to detect a heat source much further away. Both sit in the wider Pixfra Arc A6XX range, which also offers 25mm and 35mm lenses for longer detection distances.

Arc A604 Pro

• Lens4mm f/1.0
• Field of view (H)102°
• NETD sensitivity<18mK
• Detection range200m
• Magnification0.4×
• Battery lifeUp to 6h, 2 supplied
• Weight380g

You're Viewing This Model

Arc A613 Pro Ecology

• Lens13mm f/1.0
• Field of view (H)32.3°
• NETD sensitivity<18mK
• Detection range700m
• Magnification1.1×
• Battery lifeUp to 6h, 2 supplied
• Weight370g

View Product

Arc A613 Ecology

• Lens13mm f/1.0
• Field of view (H)32.3°
• NETD sensitivity<30mK
• Detection range670m
• Magnification0.875×
• Battery lifeUp to 6.5h, 2 supplied
• Weight<350g

View Product

What's included?

• Pixfra Arc A604 Pro Thermal Imaging Monocular
• Two rechargeable batteries
• USB-C charging cable
• Tripod adapter
• Carry case
• Lens cleaning cloth
• Quick start guide