IR-H Series Handheld Type Radiation Thermometers

The IR-H series is a small and lightweight handheld Infrared thermometer with a clear viewfinder.
The thru-the-lens optical system enables it to measure small targets from a long distance.
The measured value can be read on the internal digital display in the viewfinder. Three models are available - a high functional type IR-HQH having combined functions of a 2 color type + single color wide range type, a single color medium temperature type - IR-HI and a single color high temperature type IR-HS.
Data logging software is available for easy data processing by a personal computer.


  • High functional type [2-color type + single color wide range type] available.
  • The InGaAs element is used to reduce influence of emissivity, high sensitivity and high accurate measurement.
  • The digital display of measured value is displayed in the viewfinder and on the front panel.
  • A target size of 20mm diameter can be measured at the distance of 4m.
  • You can measure low temperature surface's and compensate emissivity by connecting a K-type surface thermocouple.
  • Long-term measurement by a hand is made easy due to its small size (W148 x H100 x D 70mm) and lightweight (about 350g).


Models Type
IR-HI Single-color type medium temperature
IR-HS Single-color type high temperature
IR-HQH High functional type (2-color type + single-color wide range type)
IR-VXG1E Data logging software package


Types Single-color
For high temperature
For high temperature
High functional type
[2-color type + single color wide range type]
Measuring system Narrow band radiation thermometer
Element InGaAs Si Si / InGaAs
Wavelength 1.55 mm 0.9 mm 0.9/1.55 mm
Temperature range 300 to 1000°C 600 to 2000°C 600 to 2000°C (2-color) /400 to 3000°C (single color) (key switching)
Accuracy rating
At epsilon=1.0,
Ref. operation condition: 23°C±5°C,
35 to 75%RH
±6°C Less than 1000°C: ±6°C
1000 to 1500°C: ±0.6% of measured value
1500 to 2000°C: ±1.2% of measured value
More than 2000°C: ±2.4% of measured value
Repeatability Within ±1°C
EMC Stability 1. Temperature drift:0.2°C /°C
2. ±3°C; ±50°C [(at the connection with code for RS-232C, AC adapter or thermocouple C510-0 (K)]
1. Temperature drift::
Less than 1000°C: 0.2°C /°C
More than 1000°C: 0.02% of measured value /°C
2. ±15°C; ±50°C [(at the connection with code for RS-232C, AC adapter or thermocouple C510-0 (K)]
Resolution 1°C
Response time 0.25 second (1.8 or 4 seconds: connecting with surface temperature sensor)
Emissivity compensation 0.100 to 1.900 (0.001 increment)
Math Maximum value, minimum value, average value
Signal modulation Peak, delay
Display LCD digital display 4-digit in viewfinder and on front panel
Data storage Maximum 500 data
Communications RS232C (Data logging software / IR-VXG1E, sold separately)
Optics Fixed focus system
Diameter/ Distance Φ20/4000mm (Refer to " Diameter/Distance ".)
Finder Direct view finder
Lens diameter Φ20mm
Thermocouple input K thermocouple: -50 to 800°C
Accuracy: ±2°C (at 23 ± 5°C)
Other functions Automatic power-off, automatic back-light display, continuous measurement°C/°F selection, battery check, high/low alarms
Working temperature 0 to 50°C
Power AA battery 2 pieces (about 50 hours at continuous operation) or AC power adapter (sold separately)
Case material/color Resin/gray
Outside dimensions/ weight W148 x H100 x D70mm, about 350g (thermometer)

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