The LSJ E120 is a compact, pistol-grip handheld thermal imaging camera built for fast, accurate temperature diagnostics. It pairs a 120×90 infrared sensor with a 640×480 visible-light camera, a fluid 25Hz frame rate and a wide -20°C to 550°C measurement range — giving engineers, technicians, building inspectors and maintenance teams an affordable tool for routine thermal inspections.
E120 key specifications at a glance: 120×90 IR, 2.8-inch TFT, -20°C to 550°C, 640×480 visible camera and 25Hz frame rate.
Front view: live thermal reading on the high-contrast 2.8-inch TFT display.
Clear Thermal Imaging, Honest Sensitivity
The 120×90 sensor (10,800 thermal pixels) captures the 8–14µm long-wave IR band and helps identify hidden heat signatures with precision. With an NETD of ≤50mK it is purpose-built for routine inspections and obvious hot spots — at a price that keeps every inspection cost-effective.
Thermal sensitivity (NETD) — where the E120 fits
Need small-target, long-range or predictive-maintenance performance? Step up to LSJ’s higher-resolution E-series thermal cameras.
Thermal / visible split: correlate heat signatures with real-world objects.
Dual Thermal + Visible Camera
The integrated 640×480 visible-light camera delivers crisp reference images that complement the thermal data. By correlating visible and infrared views, users quickly match a heat signature to the real component — a faulty electrical part, a water leak behind a wall or a section of missing insulation — improving target accuracy and cutting diagnostic time on site.
Thermal / visible correlationFewer false calls
Smooth Real-Time Monitoring
25Hz
Frame rate — fluid thermal updates with no lag
Fixed
Focus — point and scan, no focusing step
2.8"
TFT screen — read results on site, no second device
A 25Hz refresh rate lets you track moving targets and catch rapid temperature changes in real time — ideal for scanning panels, lines and pipework as you walk the site.
Home energy auditsUnderfloor heatingElectrical diagnosticsAutomotive maintenance
Five selectable palettes for different environments and tasks.
Five Color Palettes
Rainbow boosts contrast for general inspections, Iron Oxide Red and Cold Color emphasize heat gradients, and White Hot / Black Hot are preferred in low-light and outdoor conditions. Switch palettes in one click to make temperature differences stand out.
RainbowIron Oxide RedCold ColorWhite HotBlack Hot
What Teams Use the E120 For
One affordable imager across the most common thermal inspection jobs.
Electrical & Mechanical
Hot terminals, overloaded circuits, bearings and motor faults.
HVAC & Energy Audits
Ductwork, airflow, heat loss and equipment performance.
Building & Home Inspection
Missing insulation, thermal bridges, drafts and roof issues.
Water Leak Screening
Evaporative-cooling patterns behind walls, floors and ceilings.
Automotive Maintenance
Exhaust, brakes, cooling systems and heat management.
Underfloor Heating
Verify loop layout, blockages and even heat distribution.
Logo, casing color, labels and packaging tailored to your brand.
Build Your Own Brand — OEM / ODM
As the direct manufacturer, LSJ helps distributors, resellers and OEM partners differentiate with flexible customization:
✔Logo printing on the device
✔Casing color to match your brand
✔Labels & packaging design
Why Buy From LSJ Technology
Since 2010
Specialist search & rescue and thermal equipment manufacturer
ISO • CE • RoHS
Certified quality management and compliance
30+ Patents
In-house R&D and continuous innovation
Factory Direct
Supplying fire services, rescue teams and military users worldwide
Ready to Source the E120?
Request the datasheet, MOQ & lead time — or ask about OEM branding and sample orders.
Direct answers for specifiers and procurement teams.
What is the LSJ E120?
The E120 is an entry-tier, pistol-grip handheld thermal imaging camera made by LSJ Technology. It combines a 120×90 IR sensor, a 640×480 visible camera, a 25Hz frame rate and a -20°C to 550°C measurement range for routine thermal inspections.
What is the IR resolution of the E120?
120×90 pixels (10,800 thermal pixels), with a 26°×19° field of view through a 3.2 mm fixed-focus lens. The companion visible camera is 640×480.
How accurate is the E120 thermal camera?
±2°C or ±2% of reading between -15°C and 550°C, and ±4°C between -20°C and 15°C.
What temperature range does it measure?
-20°C to 550°C, equivalent to -4°F to 1022°F.
Can a thermal camera see through walls?
No. A thermal camera measures surface temperature rather than seeing through solid materials. It reveals surface patterns that indicate conditions behind them — such as missing insulation, drafts, moisture or hot electrical components — and findings should be confirmed with a dedicated tool or qualified professional.
Can the E120 detect water leaks?
It is an effective screening tool: wet areas cool a surface through evaporation, and that temperature differential appears on the thermal image. It does not detect water directly, so suspect spots should be confirmed with a moisture meter.
What is NETD, and what is the E120’s value?
NETD (Noise Equivalent Temperature Difference) is the smallest temperature difference a camera can distinguish; lower is better. The E120 is rated ≤50mK @ 25°C (F#1.1), which suits routine inspections and obvious hot spots.
Can I set emissivity?
Yes — emissivity is adjustable from 0.01 to 1.00. Most building materials (painted drywall, wood, brick) sit around 0.90–0.95, while shiny metals are much lower and may require matte tape for an accurate reading.
Why does the 25Hz frame rate matter?
A 25Hz refresh delivers smooth real-time imaging, so moving targets and fast temperature changes are tracked without lag while scanning.
Can I save thermal images and video?
Yes. Images are saved as JPG and video as MP4 to the built-in 4 GB eMMC storage (about 3 GB is user-available), transferable over Micro USB 2.0.
Is OEM / private-label customization available?
Yes. Factory-direct LSJ supports custom logos, casing colors, labels and packaging for distributors, resellers and OEM partners. Ask for MOQ, lead time and a sample unit.
Which menu languages are supported?
Chinese, English, German and Italian. Temperature units, date, time and device information are user-configurable.
E120 Thermal Camera — Technical Specifications
Manufacturer: LSJ Technology | Model: E120
Thermal Imaging
IR Resolution
120 × 90 (10,800 thermal pixels)
Visible Image Resolution
640 × 480 (VGA)
Field of View (FOV)
26° × 19° — 3.2 mm lens
Pixel Pitch
12 µm
Frame Rate
25 Hz
Focusing Mode
Fixed focus
Thermal Sensitivity (NETD)
≤ 50 mK @ 25 °C, F#1.1
Spectral (Wavelength) Range
8 µm – 14 µm (LWIR)
Temperature Measurement
Measurement Range
-20 °C ~ 550 °C (-4 °F ~ 1022 °F)
Accuracy
±2 °C / ±2% (-15 °C ~ 550 °C); ±4 °C (-20 °C ~ 15 °C)
Emissivity
Adjustable 0.01 – 1.00
Color Palettes
Rainbow • Iron Oxide Red • Cold Color • White Hot • Black Hot
Display, Capture & System
Display Screen
2.8-inch TFT
Storage
Built-in 4 GB eMMC (~3 GB user-available)
File Format
JPG (image) / MP4 (video)
Settings
Unit, Language, Date, Time, Information
Menu Languages
Chinese, English, German, Italian
Physical & Power
Power / Data Interface
Micro USB 2.0
Product Weight
375 g
Specifications are subject to change without notice. Confirm the visible-camera resolution (marketing material references 3 MP; the factory spec table lists 640×480) and final accuracy figures with LSJ before publication. Contact LSJ for the datasheet, MOQ, lead time and OEM options.
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