1. Introduction
This handheld infrared thermometer is designed for non-contact surface temperature measurement in industrial, automotive, HVAC, kitchen, and household applications. The device uses infrared sensing technology with laser targeting for fast and accurate readings without direct contact with the object surface.
The thermometer features a backlit LCD display, °C/°F unit switching, automatic power-off, and an ergonomic anti-slip housing for convenient operation.
Figure 1: Product Overview with Key Specifications
2. Specifications
2.1. Model-Specific Parameters
| Model | Temperature Range | Emissivity | Max Hold | Distance Spot Ratio | Accuracy |
|---|---|---|---|---|---|
| T380 | -50~400°C (-58~752°F) | Preset 0.95 | No | 12:1 | ≥0°C (32°F): ±1.5°C (±2.7°F) or ±1.5%, whichever is greater. <0°C (32°F): ±3°C (±5.4°F) or ±3%, whichever is greater. |
| T380A | Adjustable 0.1~1.0 | Yes | |||
| T580 | -50~600°C (-58~1112°F) | Preset 0.95 | No | ||
| T580A | Adjustable 0.1~1.0 | Yes | |||
| T400 | -50~400°C (-58~752°F) | Preset 0.95 | No | ||
| T400A | Adjustable 0.1~1.0 | Yes | |||
| T600 | -50~600°C (-58~1112°F) | Preset 0.95 | No | ||
| T600A | Adjustable 0.1~1.0 | Yes |
Figure 2: Model-Specific Parameters
2.2. General Specifications
| Item | Specification |
|---|---|
| Response Time | ≤500 ms (95% response) |
| Spectral Response | 8~14 μm |
| Working Temperature | 0~50°C (32~122°F) |
| Relative Humidity | 10~90% RH non-condensing |
| Storage Temperature | -20~60°C (-4~140°F), without batteries |
| Power Supply | 2 × 1.5V AAA batteries |
| Repeatability | ±1% of reading or ±1°C, whichever is greater. |
| Laser Targeting | Yes |
| Display | Backlit LCD display |
| MAX Value Hold | Available on "A" models only |
| Functions | Data hold, °C/°F switching, Auto power off, Backlight display |
| Material | ABS housing |
Figure 3: General Specifications
Figure 4: T400 Model Dimensions
Figure 5: T380/580 Series Dimensions and Controls
3. Setup
3.1. Battery Installation
The thermometer requires 2 x 1.5V AAA batteries. Please note that batteries may not be included in the package due to shipping restrictions. Ensure you have the correct batteries before use.
- Open the battery compartment located on the handle.
- Insert 2 x AAA batteries according to the polarity markings (+/-) inside the compartment.
- Close the battery compartment securely.
Figure 6: Non-Slip Handle and Battery Compartment
3.2. Power On
Press the trigger on the device to power it on. The LCD display will light up.
3.3. Unit Selection (°C/°F)
If required, press the °C/°F unit switch button to toggle between Celsius and Fahrenheit temperature units.
4. Operating Instructions
4.1. Temperature Measurement
- Aim the laser at the target surface you wish to measure.
- Hold the thermometer perpendicular to the target for best accuracy.
- Press and hold the trigger to begin measurement. The laser will activate, and the temperature reading will appear on the LCD display.
- Release the trigger; the reading will remain displayed temporarily due to the data hold function.
Figure 7: Laser Targeting for Measurement
Figure 8: Laser Targeting and Measurement Area Diagram
4.2. Emissivity Adjustment (A Models Only)
For models with adjustable emissivity (T380A, T400A, T580A, T600A), you can adjust the emissivity value for more accurate readings on different materials.
- Enter emissivity adjustment mode (refer to your specific model's button layout if not immediately obvious).
- Set the emissivity value between 0.1 and 1.0 according to the material surface you are measuring.
- Confirm the setting before measurement.
Common Emissivity Values:
| Material | Emissivity | Material | Emissivity | Material | Emissivity |
|---|---|---|---|---|---|
| Aluminum | 0.30 | Iron | 0.70 | Cotton | 0.95 |
| Lead | 0.50 | Asphalt | 0.95 | Limestone | 0.98 |
| Basalt | 0.70 | Oil | 0.94 | Brass | 0.50 |
| Paint | 0.93 | Brick | 0.90 | Paper | 0.95 |
| Carbon | 0.85 | Plastic | 0.95 | Ceramic | 0.95 |
| Rubber | 0.95 | Concrete | 0.95 | Sand | 0.90 |
| Copper | 0.95 | Skin | 0.98 | Mud | 0.94 |
| Snow | 0.90 | Frozen Food | 0.90 | Steel | 0.84 |
| Hot Food | 0.93 | Textile | 0.94 | Glass (Plate) | 0.85 |
| Water | 0.93 | Ice | 0.98 | Wood | 0.94 |
Figure 9: Adjustable Emissivity for Different Materials
4.3. Distance-to-Spot Guidance (D:S Ratio 12:1)
The device uses a 12:1 distance-to-spot ratio. This means that for every 12 units of distance from the target, the measurement spot diameter is 1 unit. As the measurement distance increases, the measurement area also increases.
- Ensure the target object is larger than the measurement spot.
- For optimal accuracy, the target size should be at least twice the spot size.
Figure 10: Distance-to-Spot Ratio Explanation
5. Maintenance
5.1. Cleaning
- Clean the housing with a soft, damp cloth only.
- Do not use solvents, alcohol, or abrasive cleaners.
- Gently clean the infrared lens using a soft cotton swab or lens cloth.
- Keep the infrared sensor lens clean and free from scratches.
5.2. Storage
- Store the thermometer in a dry, clean environment.
- Remove batteries during long-term storage to prevent leakage and damage.
- Do not immerse the device in water or expose it to excessive moisture.
- Avoid dropping or subjecting the device to strong impact.
6. Troubleshooting
6.1. Inaccurate Readings
- Reflective Surfaces: Infrared readings may be inaccurate on reflective or polished metal surfaces. If using an 'A' model, adjust the emissivity setting.
- Environmental Changes: Sudden environmental temperature changes can affect accuracy. Allow the device to stabilize in the new environment.
- Obstructions: Avoid measuring through glass, steam, dust, or smoke, as these can interfere with readings.
6.2. Device Not Powering On
- Batteries: Check if the AAA batteries are installed correctly with the correct polarity. Replace batteries if they are low or depleted.
- Trigger: Ensure the trigger is pressed firmly.
6.3. Auto Shut-Off
The device features an auto shut-off function after 12 seconds of inactivity to save power and extend battery life. This is normal operation.
Figure 11: Auto Shut-Off for Power Saving
7. Safety Information and Precautions
7.1. General Precautions
- This device measures surface temperature only and is not intended for body temperature measurement.
- Do not use the device near explosive gases, vapors, or flammable materials.
- Keep out of reach of children.
7.2. Laser Safety Notice
This product contains a low-power laser device (Class 2 laser).
- Avoid direct eye exposure to the laser beam.
- Do not point the laser beam toward eyes or reflective surfaces.
- Do not stare directly into the laser beam.
7.3. Battery Disposal
Batteries must be disposed of according to local regulations. Follow WEEE directives for electronic waste recycling.
8. User Tips
- Routine Inspections: This thermometer provides fast and reliable temperature readings, making it suitable for routine inspections in various applications.
- Measuring Liquids (Water/Oil): When measuring boiling liquids, keep the measurement angle around 45°~60° to the surface. Ensure steam or water vapor does not reach the sensing area, as this can interfere with accuracy.
- Emissivity for Materials: If you have an 'A' model, adjusting the emissivity to match the material being measured (e.g., metal, plastic, water) will significantly improve accuracy. Refer to the emissivity table in Section 4.2.
Figure 12: Correct Method for Measuring Liquid Temperature
9. Warranty and Support
For further assistance, technical consultations, or inquiries, please contact us:
- WhatsApp: +86 19542723588
- Email: celiachen008@gmail.com
A detailed user manual in PDF format is available for download: View User Manual (PDF)
Figure 13: Contact Information for Support
10. Compliance Disclaimer
This document is provided for product instruction purposes only. It does not constitute legal advice. The seller is responsible for ensuring compliance with destination market regulations.