Product Model: GM320 (Basic Model)
Measurement Range: -50–400°C
Display: Black-and-White Screen
Measurement Accuracy: ±1.5°C or ±1.5%
Repeatability: 1% of reading or 1°C
Object-to-Screen Ratio: 12:1
Response Time: 500 ms (95% response)
Response Wavelength: 5–14 µm
Emissivity: 0.95 (preset)
Laser Dot: Single dot
Maximum Value Mode: ×
Minimum Value Mode: ×
Calibration Mode: ×
Difference Mode: ×
Average Value Mode: ×
High/Low Temperature Alarm Mode: ×
Storage Function: ×
°C/°F Unit Conversion: √
Operating Temperature Range: 0°C–40°C
Power Supply: 2 × AAA batteries, 1.5 V
Packaging: Blister pack with color card
Model Numbers: GM321, GM531 (Upgraded Version)
Measurement Range: -50–400°C, -50–530°C
Display: Black-and-white screen
Measurement Accuracy: ±1.5°C or ±1.5%
Repeatability: 1% of reading or 1°C
Object-to-sensor distance ratio: 12:1
Response time: 500 ms (95% response)
Response wavelength: 5–14 μm
Emissivity: Adjustable from 0.10 to 1.00 (preset at 0.95)
Laser spot: Single spot
Maximum value mode: ×
Minimum value mode: ×
Calibration Mode: √
Difference Mode: ×
Average Mode: ×
High/Low Temperature Alarm Mode: ×
Storage Function: ×
°C/°F Unit Conversion: √
Operating Temperature Range: 0°C–40°C
Power Supply: 2 × AAA batteries, 1.5 V
Packaging: Blister-packed color card
Product Models: GT303A, GT303B (Color Screen Model with Ring-Shaped Laser)
Measurement Range: -50–450°C, -50–600°C
Display: Color Screen
Measurement Accuracy: ±1.5°C or ±1.5%
Repeatability: 1% of reading or 1°C
Object-to-Sensor Distance Ratio: 12:1
Response Time: 500 ms (95% response)
Response Wavelength: 5–14 µm
Emissivity: 0.10–1.00 adjustable (0.95 preset)
Laser Spot: Ring-shaped spot
Maximum Value Mode: √
Minimum Value Mode: √
Calibration Mode: √
Difference Mode: ×
Average Value Mode: ×
High/Low Temperature Alarm Mode: ×
Storage Function: ×
°C/°F Unit Conversion: √
Operating Temperature Range: 0°C–40°C
Power Supply: 2 × AAA batteries, 1.5 V
Packaging: Blister pack with color card
Model Numbers: GM700, GM900 (Industrial Grade)
Measurement Range: -50–750 °C, -50–950 °C
Display: Black-and-white screen
Measurement Accuracy: ±1.5 °C or ±1.5%
Repeatability: 1% of reading or 1 °C
Object-to-sensor ratio: 12:1
Response time: 500 ms (95% response)
Response wavelength: 5–14 μm
Emissivity: Adjustable from 0.10 to 1.00 (preset at 0.95)
Laser pointer: Single point
Maximum value mode: √
Minimum value mode: √
Calibration mode: ×
Difference mode: √
Average value mode: √
High/low temperature alarm mode: √
Storage Capacity: 30 entries
°C/°F Unit Conversion: √
Operating Temperature Range: 0°C–40°C
Power Supply: 9V alkaline battery or nickel-chromium battery
Packaging: Color box + tool case
Product Models: GM1150, GM1350, GM1500 (High-Temperature Model)
Measurement Range: GM1150: -30–1150°C; GM1350: -30–1350°C; GM1500: -30–1500°C
Display: Black-and-white screen
Measurement Accuracy: ±1.5°C or ±1.5%
Repeatability: 1% of reading or 1°C
Object-to-Sensor Distance Ratio: GM1150 20:1; GM1350, GM1500: 50:1
Response Time: 500 ms (95% response)
Response Wavelength: 8–14 μm
Emissivity: Adjustable from 0.10 to 1.00 (default: 0.95)
Laser Spot: Single spot
Maximum Value Mode: √
Minimum Value Mode: √
Calibration Mode: ×
Difference Mode: √
Average Mode: √
High/Low Temperature Alarm Mode: √
Storage Capacity: GM1150: 48; GM1350, GM1500: 80
°C/°F Unit Conversion: √
Operating Temperature Range: 0°C–40°C
Power Supply: 9V alkaline battery or nickel-chromium battery
Packaging: Color box + toolbox
























