The HT-18+ Thermal Imager is a handheld infrared thermal imaging camera combining 256×192 infrared resolution with 640×480 visible-light imaging. It features a 3.2-inch TFT display, 25 Hz thermal imaging, adjustable emissivity, five thermal colour palettes, dual-light fusion, and a temperature measurement range of -20°C to 550°C. It is designed for electrical inspection, building diagnostics, HVAC, mechanical maintenance, PCB inspection, and general industrial troubleshooting.

3. Detailed Product Description

Product Overview

The HT-18+ Handheld Thermal Imager provides non-contact thermal visualization and temperature measurement for locating abnormal heat patterns and temperature differences.

Its combination of 256×192 infrared imaging and 640×480 visible-light imaging allows thermal information to be viewed alongside the physical scene. The dual-light fusion mode can help users identify the exact location of a thermal anomaly on equipment, structures, electrical components, pipes, or other inspection targets.

The HT-18+ offers a broad -20°C to 550°C measurement range, adjustable emissivity from 0.01 to 1.00, and thermal sensitivity of ≤50 mK under the specified test conditions. Images and videos can be stored internally and transferred through the Type-C/Micro USB interface.

Key Features & Benefits

• 256×192 infrared thermal resolution
• 640×480 visible-light image resolution
• 3.2-inch TFT full-view display
• 25 Hz thermal imaging
• 56° × 42° field of view
• 3.75 mrad IFOV
• 12 μm pixel pitch
• Thermal sensitivity ≤50 mK
• -20°C to 550°C temperature measurement range
• Adjustable emissivity from 0.01 to 1.00
• Infrared, visible-light and dual-light fusion display modes
• Five selectable thermal colour palettes
• Center-point and hot/cold-spot tracking
• JPG image and MP4 video recording
• Built-in storage
• Offline PC software analysis
• Built-in rechargeable lithium battery
• Compact handheld design

4. Technical Specifications

5. Applications

The HT-18+ is suitable for:

• Electrical panel inspection
• Electrical hotspot detection
• PCB inspection
• Building thermal diagnostics
• HVAC inspection
• Plumbing and pipe inspection
• Mechanical equipment maintenance
• Motor and bearing inspection
• Automotive diagnostics
• Industrial equipment troubleshooting
• Preventive maintenance
• Firefighting and emergency inspection
• Security and patrol applications
• Agricultural inspection
• General research and development
• Temperature anomaly detection

6. Suitable For

• Electrical engineers and technicians
• Maintenance engineers
• HVAC technicians
• Facility management teams
• Building inspection professionals
• Industrial maintenance departments
• Mechanical engineers
• Automotive technicians
• PCB and electronics technicians
• Research laboratories
• Manufacturing plants
• Fire and emergency service teams
• Technical inspection companies

7. Product Benefits

Detailed Thermal Imaging

The 256×192 infrared detector provides detailed thermal images for identifying temperature variations.

Dual-Light Visualization

Infrared and visible-light imaging can be combined to provide better context around a thermal anomaly.

Wide Temperature Range

The instrument measures temperatures from -20°C to +550°C, supporting a broad range of inspection applications.

High Thermal Sensitivity

A specified NETD of ≤50 mK helps reveal relatively small thermal differences.

Fast Thermal Imaging

The 25 Hz image frequency provides responsive thermal visualization during inspection.

Flexible Emissivity Adjustment

Emissivity can be adjusted between 0.01 and 1.00 to accommodate different target surfaces.

Image & Video Documentation

JPG images and MP4 videos can be captured and stored for inspection records.

Portable Design

At approximately 389 g, the handheld design is convenient for field and maintenance work.