Pixfra Arc A604 PRO (640x512/12µm) Thermal Imager

Pixfra Arc A604 Pro Thermal Performance

The Arc A604 Pro uses a 640×512 thermal sensor with a 12µm pixel pitch and <18mK NETD thermal sensitivity. This high level of sensitivity helps distinguish small differences in temperature, while the 50Hz frame rate supports smooth observation of moving wildlife.

A 4mm f1.0 objective lens produces an exceptionally wide 102° horizontal and 83° vertical field of view. With a detection range of up to 200 metres and a native magnification of 0.4x, the Arc A604 Pro prioritises broad scene coverage rather than narrow, long-range observation.

Ultra-Wide Field of View for Ecological Surveys

The 102° field of view allows a large observation area to remain visible at once, reducing the need to continually pan the monocular. This is particularly useful when monitoring fast-moving subjects such as bats or when observing broader habitats and groups of animals.

The expanded viewing area also allows more activity to be captured within recorded footage, which can be useful when surveys are being reviewed and analysed after the observation period has finished.

Exceptionally Close Focusing

A close focus distance of just 20mm allows the Arc A604 Pro to be used for detailed thermal observation at very short distances. This opens up applications including interior surveys, examining insects and invertebrates, observing smaller mammals and identifying fine-scale heat patterns.

Pixfra Arc A604 Pro Recording & Survey Features

The Arc A604 Pro includes a built-in video recorder and 32GB of internal EMMC storage. Video can be recorded continuously in 30-minute clips, with audio captured alongside the footage, allowing survey data to be reviewed after fieldwork has been completed.

Still images can also be captured, while tripod mounting enables the monocular to remain fixed on an observation area for longer survey periods. This makes it possible to position the device, begin recording and leave it monitoring a defined area without requiring continuous handheld operation.

Wi-Fi & Multi-User Viewing

Built-in Wi-Fi allows the Arc A604 Pro to connect to the free Pixfra app for Android and iOS. Up to four smartphones or tablets can view the live thermal image simultaneously within a range of up to 20 metres.

This can be particularly useful during group surveys, allowing several observers to monitor the same activity without having to take turns using the monocular's eyepiece.

Pixfra Arc A604 Pro Construction & Field Use

A magnesium alloy housing provides a robust exterior while keeping overall weight low. At 380g excluding the battery, the Arc A604 Pro remains compact and manageable for extended observation sessions or for carrying between survey locations.

The controls are positioned for straightforward operation, while an IP67 protection rating provides resistance against water ingress during wet field conditions. The monocular is designed to operate across temperatures from -30°C to +55°C.

Display & Viewing

The Arc A604 Pro uses a 0.41-inch OLED display with a 1440×1080 resolution. A -4D to +5D diopter adjustment provides additional viewing flexibility, while eye relief is 15mm.

Six colour palettes are available: white hot, black hot, iron red, alarm, amber and emerald. Hot spot tracking is also supported.

Battery Performance

The Arc A604 Pro uses a rechargeable 3,200mAh 1850 lithium battery, providing up to six hours of operating time. Two rechargeable, replaceable batteries are supplied, allowing one battery to be exchanged for another when additional survey time is required.

The device also supports a 5V USB Type-C power supply.

Pixfra Arc A604 Pro Key Features

• 640×512, 12µm thermal sensor
• <18mK NETD thermal sensitivity
• 50Hz frame rate
• 4mm f1.0 objective lens
• 102° horizontal and 83° vertical field of view
• Up to 200m detection range
• 20mm close focus distance
• 0.4x native magnification
• 0.4-3.2x digital zoom
• Six colour palettes
• Built-in video and audio recording
• Still image capture
• 32GB internal EMMC storage
• Tripod mountable
• Wi-Fi connectivity
• Live viewing on up to four smartphones or tablets
• Hot spot tracking
• 0.41-inch OLED display
• 1440×1080 display resolution
• IP67 protection
• Magnesium alloy housing
• Up to six hours of battery life per battery
• Two rechargeable, replaceable batteries supplied

Pixfra Arc A604 Pro Specifications

• Thermal sensor: 640×512, 12µm, <18mK NETD
• Detector type: Vanadium oxide uncooled focal plane detector
• Spectral range: 8µm-14µm
• Frame rate: 50Hz
• Objective lens: 4mm f1.0
• Field of view: 102° horizontal, 83° vertical
• Detection range: 200m
• Magnification: 0.4x
• Digital zoom: 0.4-3.2x
• Close focus distance: 20mm
• Colour palettes: White hot, black hot, iron red, alarm, amber and emerald
• Display: 0.41-inch OLED
• Display resolution: 1440×1080
• Diopter adjustment: -4D to +5D
• Eye relief: 15mm
• Uniformity correction: Automatic and manual
• Storage: 32GB built-in EMMC
• Audio recording: Yes
• Hot spot trace: Yes
• Wi-Fi: Yes
• Power supply: 5V Type-C
• Battery type: Rechargeable 1850 lithium battery
• Battery capacity: 3,200mAh
• Battery operating life: Up to 6 hours
• Operating temperature: -30°C to +55°C
• Protection rating: IP67
• Dimensions: 168 × 53 × 78mm
• Net weight: 380g excluding battery

Pixfra Arc A604 Pro Review

The Pixfra Arc A604 Pro is a specialised thermal monocular aimed squarely at professional ecological observation. Rather than prioritising high magnification, its defining strength is its exceptionally wide 102° horizontal field of view, allowing large areas to be monitored from a single position.

Combined with its sensitive 640×512 thermal sensor, 20mm close focus capability, tripod mounting and continuous video recording, it is particularly well configured for structured surveys where both broad scene coverage and subsequent analysis are important.

Pixfra Arc A604 Pro Performance & Key Features

The 640×512, 12µm sensor and <18mK NETD sensitivity provide the foundation for detecting relatively small heat differences, while the 50Hz refresh rate supports smooth tracking of moving subjects. The unusual 4mm f1.0 lens trades high native magnification for an extremely broad 102° viewing angle, making the device particularly effective where situational awareness is more important than distant identification.

• 102° horizontal field of view for exceptionally broad observation
• 640×512 sensor with <18mK NETD sensitivity
• 20mm close focus for detailed short-range thermal work
• Continuous video recording with audio
• Up to 200m detection range

Build Quality & Handling

The magnesium alloy housing combines durability with a relatively low 380g weight, helping the Arc A604 Pro remain manageable during longer survey sessions. Its IP67 protection rating and -30°C to +55°C operating range also make it suitable for demanding outdoor fieldwork across a wide range of weather conditions.

Its compact dimensions and ergonomic control layout further support both handheld observation and deployment on a tripod.

Is the Pixfra Arc A604 Pro Easy to Use?

The Arc A604 Pro is designed around straightforward field operation, particularly for surveys where the monocular can be positioned on a tripod and left recording. Continuous recording in 30-minute clips reduces the need for repeated interaction during longer observation periods, while its internal 32GB storage keeps captured footage on the device for later review.

Wi-Fi connectivity also allows up to four people to share the live thermal view through smartphones or tablets, making collaborative observation considerably easier.

Key Takeaways of the Pixfra Arc A604 Pro

The Pixfra Arc A604 Pro stands out primarily for its exceptional 102° field of view, sensitive 640×512 thermal sensor and unusually short 20mm close focus distance. It is designed less around long-range magnified observation and more around capturing as much thermal activity as possible within a broad scene, making it particularly well suited to ecological survey work. Continuous video and audio recording, tripod mounting, app connectivity and replaceable batteries further strengthen its credentials for professional monitoring. For ecologists carrying out bat surveys, habitat observation, close-range studies or group behavioural analysis, the Arc A604 Pro offers a highly specialised combination of coverage, recording and thermal performance.

Pixfra Arc A604 Pro FAQs

What is the field of view of the Pixfra Arc A604 Pro?

The Arc A604 Pro provides a 102° horizontal and 83° vertical field of view. Its 4mm f1.0 objective lens is specifically designed to provide exceptionally wide scene coverage, reducing the need to constantly scan the monocular around an observation area.

Is the Pixfra Arc A604 Pro suitable for bat surveys?

Yes. The Arc A604 Pro has been designed for professional ecological applications including bat surveys. Its wide 102° field of view helps observers monitor a large area and follow fast-moving animals, while continuous video recording allows footage to be analysed after the survey.

What thermal sensor does the Pixfra Arc A604 Pro use?

It uses a 640×512, 12µm vanadium oxide uncooled focal plane detector. Thermal sensitivity is rated at less than 18mK NETD, with a 50Hz frame rate.

How close can the Pixfra Arc A604 Pro focus?

The Arc A604 Pro has a minimum close focus distance of just 20mm. This makes it suitable for close-range ecological work such as interior surveys, observing insects and invertebrates, examining smaller mammals and investigating detailed heat patterns.

What is the detection range of the Pixfra Arc A604 Pro?

The stated detection range is up to 200 metres. The device uses 0.4x native magnification and provides 0.4-3.2x digital zoom.

Can the Pixfra Arc A604 Pro record video?

Yes. The Arc A604 Pro has a built-in video recorder capable of continuous recording, with footage saved in 30-minute clips. Audio is also recorded, and files are stored on the monocular's 32GB internal EMMC storage.

Can the Pixfra Arc A604 Pro take photographs?

Yes. In addition to video recording, the Arc A604 Pro supports still image capture.

Can the Pixfra Arc A604 Pro be mounted on a tripod?

Yes. The monocular is tripod mountable, allowing it to be positioned over a fixed observation area for extended surveys. This is particularly useful when combined with its continuous recording function.

Can several people view the Pixfra Arc A604 Pro at the same time?

Yes. Using the free Pixfra app, up to four smartphones or tablets can connect to the monocular simultaneously. Connected devices can view the live thermal image within a range of up to 20 metres.

How long does the Pixfra Arc A604 Pro battery last?

Each rechargeable 3,200mAh battery provides up to six hours of operating time. Two replaceable rechargeable batteries are supplied, allowing the depleted battery to be exchanged during longer observation sessions.

Is the Pixfra Arc A604 Pro waterproof?

The Arc A604 Pro carries an IP67 protection rating. This provides protection against water ingress during wet field conditions and complements its magnesium alloy housing for outdoor survey use.

What temperature range can the Pixfra Arc A604 Pro operate in?

The monocular is designed to operate between -30°C and +55°C. This allows it to be used across a broad range of environmental conditions, from very cold winter surveys to high-temperature fieldwork.

For more options, explore the full range of Pixfra thermal imaging monoculars here.