Guide PT II professional thermal camera with standard infrared lens, front three-quarter view.

Guide Sensmart PT870S PT II Thermal Imaging Camera with ApexVision

Flagship ultra-high-resolution thermal imaging system for critical utility, power-generation and industrial inspections.

Resolve exceptionally small or distant targets: 1280 × 1024 native infrared resolution with ApexVision S1 super-resolution output up to 2560 × 2048 provides maximum detail and extensive cropping flexibility
Reveal the finest thermal patterns: ≤15mK thermal sensitivity helps distinguish subtle temperature differences across complex equipment and large inspection areas
Scan smoothly in real time: 50Hz imaging maintains a fluid live view while inspecting moving equipment or working across large sites
Configure it for specialist applications: interchangeable standard, wide-angle, telephoto, macro, DFOV and high-temperature lens options support close-up, long-distance and extreme-temperature inspections

Found this camera and lens configuration available for less from another authorised UK retailer? Send us the details and we will try our best to match the price - we normally can.

Free tracked and insured delivery is included with all camera orders to standard UK addresses.

Corey Technical also manages import VAT, customs clearance and duties - where applicable - so you will not receive an unexpected import bill.

Speak directly with Corey Technical for product comparisons, lens selection, quotations, order updates and after-sales support.

We aim to respond promptly and remain your point of contact throughout your purchase.

Contact Corey Technical

Model: PT870S · Product code: GS-PT870S-25

£35,885.00 incl. VAT £29,904.17 excl. VAT

Shipping calculated at checkout.

Available to order

Typical UK delivery: 7–10 working days. Longer lead times may apply to selected configurations.

Lens Configuration

Price includes the PT870S camera and selected lens configuration.

Request a formal quotation

Unsure which lens you need? Get configuration advice →

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Quotations and VAT invoices available

UK-based pre and post-sale support

Secure card and bank-transfer payment

Manufacturer-backed warranty assistance

1280 × 1024 native infrared resolution
ApexVision S1 super-resolution output up to 2560 × 2048
Adjustable emissivity with preset and custom values
Measurement corrections: Reflected temperature, atmospheric temperature and transmission, humidity, target distance and external optics
≤ 15 mK thermal sensitivity
50Hz infrared frame rate
Temperature measurement range: −40°C to 800°C (400°C to 2,500°C with the optional high-temperature lens)
Measurement accuracy: ±2°C or ±2%, whichever is greater (up to ±1°C or ±1% under specified conditions)
Manual, automatic, continuous, laser-assisted and touch-to-focus modes
5.5-inch, 1920 × 1080 touchscreen display with Full HD OLED viewfinder
Dual visible-light cameras: 8MP + 16MP with autofocus
Laser ranging from 0.1m to 35m
Up to 3.5 hours’ operation per battery
Charges to 90% in approximately one hour
IP54-rated protection
64 GB internal storage with 128 GB SD card supplied and support up to 256 GB
Wi-Fi, Bluetooth 5.0, GPS, electronic compass, USB-C and Micro HDMI
1.84 kg with standard lens and battery

Field of view, focal length, spatial resolution, minimum object distance and distance-to-spot ratio depend on the selected lens. See the lens guide below.

Guide PT870S PT II thermal camera
Selected lens configuration
Front lens cap and rear lens cover
Two rechargeable lithium-ion batteries
Desktop cradle charger
Power adapter and adapter-plug set
USB-A to USB-C cable
USB-C to USB-C cable
Micro HDMI-to-HDMI cable
USB-C to Ethernet adapter and Ethernet cable
128 GB SD card
Wrist strap and shoulder strap
Protective carrying bag
Hard protective safety case
Quick-start guide
Warranty card
Delivery inspection report
Manufacturer calibration certificate

Dispatch and delivery

Orders are dispatched, for free, directly from Guide Sensmart in China using DHL or UPS. Tracking is provided and a signature is required on delivery.

Where the camera is already available with the selected lens configuration fitted and calibrated, Guide will dispatch it within three working days of payment. Shipping from China to the UK then takes approximately 5 days.

Where the camera and lens are available separately but require configuration and calibration, the preparation lead time is approximately 30 days before shipment. If the required lens is not in stock, the combined production and calibration lead time may be up to 60 days.

The expected delivery window will be confirmed for your selected configuration.

Import charges

Corey Technical covers import VAT, customs clearance and related import costs. You will not receive an additional import bill on delivery.

Returns

Contact Corey Technical before returning any product so we can ensure the correct process is followed and your return is handled as quickly as possible. Products must not be sent directly to Guide Sensmart without written return authorisation from us.

Change-of-mind and other non-fault returns may be requested within 14 calendar days of delivery. Products must be returned complete with all supplied packaging, accessories and documentation, and must not have been handled beyond what is reasonably necessary to inspect them.

If you believe the product has a manufacturing fault, contact us within 14 calendar days of delivery. Where a manufacturing defect is confirmed, Corey Technical will arrange the appropriate return, refund or replacement.

After this 14-day return period, faults affecting business purchases will be handled under the applicable manufacturer-backed warranty. Consumer cancellation rights and statutory rights relating to faulty, misdescribed or unsuitable goods remain unaffected.

We aim to make returns as straightforward and low-friction as possible, and our team will guide you through each step to minimise downtime.

Faults and warranty

Every PT870S supplied by Corey Technical includes the following manufacturer-backed warranty cover:

Camera: 3 years
Infrared detector: 10 years
Supplied accessories, including the lens: 2 years

If a fault develops during the applicable warranty period, please contact hello@coreytechnical.co.uk with your order number, product serial number, a description of the issue and any supporting photographs or video. We will respond promptly and coordinate the next steps on your behalf.

Corey Technical manages the warranty process directly with Guide Sensmart, including assessment, repair or replacement where applicable. Once an authorised unit is received by Guide, eligible repairs or replacements are normally returned within seven working days. If a repair is expected to take longer, an estimated timescale will be provided within three working days.

All returns, repairs and replacements must be authorised in advance so we can ensure safe transit and the most efficient possible resolution.

Standalone operation

The PT870S operates as a standalone thermal imaging camera. A computer or mobile app is not required to capture, review, analyse or store thermal images and radiometric video during an inspection.

Analysis and reporting software

Guide ThermoTools for Windows and the FocusIR app for iOS and Android are available at no additional charge, with no ongoing subscription.

ThermoTools supports detailed thermal-image analysis and report preparation. FocusIR supports compatible mobile viewing, image transfer and analysis workflows.

Downloads

For assistance with setup, software or product operation, contact hello@coreytechnical.co.uk. Corey Technical will liaise with Guide Sensmart where manufacturer input is required.

Is the PT870S right for your work?

The PT870S combines 1280 × 1024 native infrared resolution, ≤15mK thermal sensitivity and 50Hz imaging with Guide’s advanced PT II inspection platform. Its detector records four times as many native thermal measurement pixels as the PT650S, providing substantially greater detail when the target is small, distant or cannot be approached safely.

It is designed for power utilities, specialist thermographers, critical-asset maintenance teams and research professionals whose inspection results depend on retaining fine thermal detail. This includes demanding long-range inspections, extensive image cropping, large-format reporting and applications where a small anomaly could carry significant operational or financial consequences.

Its interchangeable lens system covers wide-angle, telephoto, macro, TwinView and high-temperature inspection. The standard configurations measure up to 800°C, while the optional high-temperature lens extends measurement to 2,500°C.

Well suited to:

High-voltage substations, transformer bushings, insulators and electrical connections
Overhead power lines and other small targets inspected from a safe stand-off distance
Power generation, transmission and distribution condition monitoring
Critical industrial electrical and mechanical assets where early fault detection is essential
Professional thermography requiring heavy cropping or highly detailed client reports
Scientific research, product development and advanced thermal analysis
Inspections where access restrictions prevent the operator from moving closer
Organisations that require the highest native resolution available in the PT II range

Consider the PT650S if:

640 × 512 native resolution provides sufficient detail at your normal working distances
You only occasionally need to crop or enlarge inspection images substantially
Most targets are accessible using standard or medium-telephoto lenses
You want a high-resolution PT II platform without paying for capability your inspections will rarely use

Consider the PT450S if:

Most inspections involve accessible targets at close-to-moderate distances
Your work primarily involves routine electrical, mechanical, HVAC/R or building inspections
480 × 360 native resolution is sufficient for your reporting requirements
Lower initial investment is more valuable than maximum long-distance or cropping performance

Compare PT II models All Guide cameras

Black utility thermographer using a tripod-mounted Guide PT870S thermal camera to inspect high-voltage substation equipment.

Choose the right lens configuration

Lens choice determines how much of the scene is visible and how many detector pixels are placed on the target at a given distance. Wider lenses show more of nearby scenes, while narrower lenses provide more spatial detail on smaller or more distant targets. No single configuration is best for every application.

Need multiple lenses or a replacement accessory? Contact us before ordering so compatibility and any calibration requirements can be confirmed.

Fixed field-of-view lenses

Choose between wider scene coverage and greater spatial detail on smaller or more distant targets. The figures below are specific to the PT870S.

Wide-angle 45°

Best for: Building surveyors, HVAC/R engineers, researchers and industrial or electrical inspectors covering large nearby targets, plant rooms, switchboards and confined spaces.

Benefit: Provides the widest PT870S view and shortest working distance, allowing the camera's full 1280 × 1024 detector to cover more of a large nearby scene.

Consideration: It places fewer detector pixels on small or distant targets than the 25°, 15° or 7° options.

Field of view: 45° × 36°

Minimum focus: 0.15m

D:S ratio: 1639:1

Temperature range: −40°C to 800°C

Standard 25°

Best for: Professional thermographers, utilities, electrical contractors and critical-asset maintenance teams carrying out varied inspections at close to moderate distances.

Benefit: The most balanced one-lens PT870S configuration for scene coverage, working distance and target detail.

Consideration: Choose a specialist lens if most work involves confined spaces, very small targets, long distances or temperatures above 800°C.

Field of view: 25° × 20°

Minimum focus: 0.3m

D:S ratio: 2941:1

Temperature range: −40°C to 800°C

Medium telephoto 15°

Best for: Utility, substation, solar and industrial inspectors assessing smaller connections, components or critical mechanical assets from a moderate stand-off distance.

Benefit: Places more of the PT870S detector on the target than the 25° or 45° options without the very narrow framing of the 7° lens.

Consideration: The narrower view is less efficient for broad surveys and requires at least 0.5m focusing distance.

Field of view: 15° × 12°

Minimum focus: 0.5m

D:S ratio: 5000:1

Temperature range: −40°C to 800°C

Telephoto 7°

Best for: Utility, power-network, solar and industrial specialists inspecting overhead lines, substation components or other small and inaccessible targets from longer distances.

Benefit: Delivers the greatest long-distance spatial detail available on the PT870S, with a 10,000:1 distance-to-spot ratio for small, inaccessible targets.

Consideration: The very narrow view and 5m minimum focusing distance make it unsuitable for overview or nearby inspection work.

Field of view: 7° × 5°

Minimum focus: 5m

D:S ratio: 10,000:1

Temperature range: −40°C to 800°C

Macro configuration

Designed specifically for very small components at a controlled close working distance.

High-temperature configuration

A dedicated 25° lens extends the PT870S into a 400°C to 2,500°C specialist range and is only necessary when targets may exceed 800°C.

Macro

Best for: Electronics engineers, scientific and R&D teams, and quality-control specialists inspecting circuit boards, assemblies and other very small components.

Benefit: Provides 3× magnification and 36.0µm spatial resolution across a 46.1 × 36.9mm viewed area.

Consideration: It requires a fixed 100mm working distance and is intended for controlled close-up work rather than general handheld inspections.

Viewed area: 46.1 × 36.9mm

Working distance: 100mm

Spatial resolution: 36.0µm

Magnification: 3×

Up to 2,500°C

High-temperature 25°

Best for: Process, metallurgy and maintenance engineers inspecting furnaces, kilns, foundries, refractory linings and other extreme-temperature assets.

Benefit: Combines the balanced 25° view with a dedicated 400°C to 2,500°C measurement range.

Consideration: It is a specialist configuration and is only necessary when targets may exceed the standard configurations' 800°C limit.

Field of view: 25° × 20°

High-temperature range: 400°C to 2,500°C

TwinView dual field-of-view configurations

TwinView DFOV configurations provide two selectable optical fields of view in one lens, allowing the view to change without removing the lens. They do not provide continuous optical zoom.

Guide PT II thermal camera with standard and wide-angle TwinView dual field-of-view lens

DFOV standard 25° + wide-angle 45°

Best for: Professional thermographers, building surveyors, HVAC engineers and industrial or electrical teams moving between general inspections, confined spaces and large nearby assets.

Benefit: Switches between the balanced 25° view and wide 45° view without changing lenses.

Consideration: Neither view increases detail on distant targets; choose the 15° DFOV or dedicated 7° lens when reach is more important.

Fields of view: 25° × 20° / 45° × 36°

Minimum focus: 0.5m / 0.5m

D:S ratio: 2941:1 / 1639:1

Temperature range: −40°C to 800°C

Guide PT II thermal camera with standard and medium-telephoto TwinView dual field-of-view lens

DFOV standard 25° + medium telephoto 15°

Best for: Utility, substation, electrical and industrial maintenance professionals who need both an overview and more detail on smaller or moderately distant targets.

Benefit: Switches between an all-purpose 25° view and a more detailed 15° view without changing lenses, making it the most versatile PT870S configuration for mixed-distance utility and industrial inspections.

Consideration: It does not provide the wider coverage of the 45° lens or the long-distance reach of the dedicated 7° configuration.

Fields of view: 25° × 20° / 15° × 12°

Minimum focus: 0.3m / 1.5m

D:S ratio: 2941:1 / 5000:1

Temperature range: −40°C to 800°C

Unsure which lens is appropriate? Tell us the approximate target size, working distance and expected temperature range, and we’ll help identify the most suitable configuration before ordering.

Ask for lens advice

High-voltage terminal and conductor assemblies viewed from below in an outdoor electrical substation.

Thermal image of a high-voltage substation showing localised overheating at the central conductor connection.

Maximum thermal detail when distance and target size matter

The PT870S combines a 1280 × 1024 native infrared detector, ≤15mK thermal sensitivity and 50Hz imaging to capture fine thermal evidence across demanding utility, industrial and scientific inspections. It is built for work where the target is small or distant, moving closer is unsafe or impossible, and losing detail could mean overlooking a costly developing fault.

Resolve small, distant targets from a safe position

Its 1,310,720 native temperature-measurement points provide four times the detector resolution of the PT650S. Paired with the optional 7° telephoto lens and its 10,000:1 distance-to-spot ratio, the PT870S can place substantially more measurement pixels on connections, line hardware and other small targets at long working distances.

Separate subtle anomalies across complex assets

≤15mK thermal sensitivity helps distinguish small temperature differences between comparable phases, components and test areas. The high native resolution keeps individual features clearly defined within dense or complicated scenes, making abnormal patterns easier to isolate and investigate.

Preserve detailed evidence for analysis and reporting

Fully radiometric images retain temperature data for post-inspection analysis. ApexVision S1 super-resolution produces enhanced output up to 2560 × 2048, while dual 8MP and 16MP visible-light cameras record detailed supporting context for cropping, close review and professional reports.

Configure the system around each inspection

A 50Hz frame rate and five focus modes maintain a clear, responsive live view. Interchangeable 45°, 25°, 15° and 7° lenses, TwinView configurations, a 3× macro option and temperature measurement up to 2,500°C allow one platform to cover specialist targets, distances and operating environments.

Guide PT II "what's included" image showing charging cables, lens caps, wrist and shoulder straps, extra batteries, battery charging cradle, SD card, mains plug adapters.

Everything you need to start inspecting

The PT870S is supplied as a complete professional kit, with your selected lens configuration calibrated before dispatch.

Guide PT870S PT II thermal camera
Selected lens configuration
Front lens cap and rear lens cover
Two rechargeable lithium-ion batteries
Desktop cradle charger
Power adapter and adapter-plug set
USB-A to USB-C cable
USB-C to USB-C cable
Micro HDMI to HDMI cable
USB-C to Ethernet adapter and Ethernet cable
128 GB SD card
Wrist strap and shoulder strap
Protective carrying bag
Hard protective safety case
Quick-start guide
Warranty card
Delivery inspection report
Manufacturer calibration certificate

Standalone in the field. Powerful when connected.

Standalone operation

Capture, review and store thermal images and video directly on the camera without requiring a computer or mobile app.

ThermoTools: ThermoTools thermal analysis software displayed on a desktop monitor

ThermoTools for Windows

Free desktop software for detailed thermal-image analysis and professional report preparation, with no ongoing subscription.

FocusIR: FocusIR mobile thermal imaging app displayed on a smartphone

FocusIR for mobile

Free iOS and Android app supporting mobile viewing, image transfer and compatible analysis workflows.

Downloads

PT II user manual PT II quick-start guide PT870S product leaflet and specifications PT II lens selection chart

ThermoTools for Windows FocusIR for iOS FocusIR for Android

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Tracked delivery

Orders are dispatched directly from Guide Sensmart using DHL or UPS. Tracking is provided and a signature is required on delivery.

Confirmed lead times

Orders normally arrive in 7–10 working days. Certain lens configurations may require a 30–75 day lead time. Contact us to confirm.

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No import charges

Corey Technical covers import VAT, customs clearance and related import costs. You will not receive an additional import bill on delivery.

Manufacturer-backed protection

All orders include a 3-year camera warranty, 10-year infrared-detector warranty and 2-year warranty on supplied accessories.

Guide PT II PT870S FAQs

Clear answers to the most common questions about selecting, ordering and using the PT870S.

The PT870S is designed for inspections where maximum thermal detail has genuine operational value: small or distant electrical connections, high-voltage assets, complex industrial equipment, scientific analysis and other critical targets that cannot easily be approached. Its 1280 × 1024 detector is particularly valuable when substantial cropping, long-distance inspection or large-format reporting is required.

For routine close-range electrical, HVAC or building inspections, the PT650S may provide sufficient detail at a lower cost.

The standard 25° lens is the best all-purpose choice for most electrical, mechanical and industrial inspections.

Choose:

Wide-angle 45° for confined spaces, plant rooms, building surveys and large nearby equipment
Medium telephoto 15° for smaller targets at moderate distances
Telephoto 7° for distant utility, substation, solar or industrial targets
Macro for circuit boards and very small components at a fixed 100mm working distance
High-temperature 25° for targets between 400°C and 2,500°C
TwinView 25° + 45° for switching between standard and wide views
TwinView 25° + 15° for switching between general inspection and greater stand-off detail

If you provide the approximate target size, working distance and temperature range, Corey Technical can help identify the most suitable configuration before ordering.

Yes. The PT870S has an interchangeable lens system, so compatible lenses can be added as your inspection requirements develop. However, lens choice directly affects scene coverage, working distance and the amount of detector detail placed on the target. If you know the approximate target size, inspection distance and temperature range, contact us before ordering and we can help identify the most appropriate configuration.

Standard PT870S configurations provide measurement ranges of −40°C to 150°C and 0°C to 800°C. The dedicated high-temperature 25° lens extends this capability to 400°C to 2,500°C for furnaces, kilns, foundries and other extreme-temperature applications.

The 1280 × 1024 detector records 1,310,720 native temperature-measurement points—four times the native resolution of the PT650S. Combined with ≤15mK thermal sensitivity, this allows the camera to resolve fine component boundaries and distinguish subtle temperature differences across complex scenes. ApexVision S1 super-resolution can also produce enhanced images up to 2560 × 2048 for closer review and reporting.

The PT870S can reveal thermal patterns associated with high-resistance electrical connections, phase imbalance, overloaded components, deteriorating bearings, motor faults, friction, insulation defects, heat loss, moisture-related anomalies, process irregularities and abnormal heating or cooling. The exact fault still requires interpretation by a competent inspector, but the PT870S provides the thermal detail needed to locate, compare and document potential problems.

Yes. The PT870S captures fully radiometric JPEG images and radiometric video, preserving temperature data for post-inspection analysis. Guide ThermoTools software supports detailed review and reporting, while the dual 8MP and 16MP visible-light cameras provide high-resolution supporting context. This allows thermal findings, measurements and visible evidence to be presented together in professional inspection reports.

No. The PT870S operates as a complete standalone thermal camera, allowing images and radiometric video to be captured, reviewed, analysed and stored directly on the device.

Guide ThermoTools for Windows supports more detailed analysis and report preparation, while the FocusIR app supports compatible mobile viewing, transfer and analysis workflows. Both Thermotools and FocusIR are free to use. No ongoing subscription is required to operate the camera.

Yes. All Guide's thermal cameras and lens configurations available at Corey Technical are prepared by Guide Sensmart and supplied with a manufacturer calibration certificate.

The PT870S will arrive with a calibration certificate and inspection report, along with the batteries, charger, cables, SD card, carrying case and other standard accessories. It is supplied ready for professional thermal inspection.

If your contracts or quality procedures require a particular accredited or UKAS-traceable calibration service, contact Corey Technical before ordering so the requirement can be checked and quoted separately.

Orders are dispatched directly from Guide Sensmart in China using DHL or UPS, with tracking and signature on delivery.

Available configurations normally arrive within 7–10 working days. Certain camera and lens combinations may require a 30–75 day lead time; the expected window will be confirmed for your selected configuration.

Corey Technical covers import VAT, customs clearance and related import costs. You will not receive an additional import bill on delivery.

The PT870S includes a 3-year manufacturer-backed camera warranty, a 10-year infrared-detector warranty and a 2-year warranty covering the selected lens and supplied accessories.

Corey Technical manages the warranty process with Guide Sensmart, including assessment, repair or replacement where applicable. Contact us before returning any equipment so the correct process can be arranged.

Contact Corey Technical within 14 days of delivery if you wish to request a non-fault return. The camera must be unused, complete and in its original condition with all packaging and accessories. Returns must be authorised before anything is sent.

If a fault develops, contact us with the order number, serial number and details of the issue. Faults outside the return period are handled through the applicable warranty, without affecting any statutory rights that apply to the purchase.

Need help before ordering?

Tell us your application, target size and working distance. We’ll help confirm the most suitable camera and lens configuration.

Ask for product advice Request a quote

See Guide Sensmart cameras in detail

Watch official Guide Sensmart videos covering the PT II and Hammer Series, from camera operation and measurement setup to Super Resolution and supplied equipment.