IT-545 Series High-accuracy Infrared Thermometers [Handheld Models]


The hand-held IT-545 is a high accuracy , thermal-radiation-type thermometer that uses a point marker to clearly designate the measurement location.

In addition to being very portable, the IT-545 is easy to use, and is equipped with a range of advanced features that provide a high level of functionality.

It is ideal for remote temperature measurement in dangerous applications such as monitoring abnormal heat generation in voltage transformer equipment, and for quick, accurate and hygienic monitoring of the storage temperature of foodstuffs.

The twin-beam laser marker provides clear target designation, and the operator is immediately notified of temperature abnormalities by an alarm and flashing of the marker.


  • High-accuracy (+/-1°C), high repeatability (+/-0.3°C), and fast response (within 0.8 sec, 95%)

  • Easy-to-carry, compact and lightweight design

  • Quick, accurate readings, even under rapidly changing ambient temperatures minimizing “temperature drift”

  • Wide measurement area

  • Abnormal temperature warning by audio alarm and flashing marker*
    *Only for models designated IT-545NH and IT-545



<For standard measurements> 

  • To confirm the efficacy of roof greening or heat-island prevention materials
  • Non-contact testing of high-voltage equipment such as a power supply system
  • Temperature measurement as a part of lab tests
  • Surface temperature measurement of ICs and other minute surfaces

<For high-precision measurements>

  • For biochemistry, physics and chemistry research
  • For definite safety judgment, such as safety confirmation of temperature
  • When keeping the record of temperature inspection result is needed
  • Temperature measurement for refrigerated transport
  • For strict food temperature management


Manufactured by HORIBA



Narrow-focus model : IT-545NH, IT-545N
Spot-focus model : IT-545S

Measurement wavelength

8  to 14μm

Measurement temp. range*1

IT-545NH :-50 to 1000℃
IT-545N    :-50 to 500℃
IT-545S    :-50 to 500℃

Display resolution

0.1℃ for 0.0 to 199.9℃
1℃ for other than above

 -50 to -0℃
 0.0 to 199.9℃
200 to 500℃
501 to 1000℃

±(10% of reading -1.5)℃
±(0.5% of reading +0.5)℃
±(0.5% of reading +0.5)℃  [Only for IT-545NH]

-50 to -0℃
 0.0 to 199.9℃
200 to 500℃
501 to 1000℃

±1℃  [Only for IT-545NH]

Response time

Within 0.8 sec (95%)

Measuring diameter

IT-545NH :Ø40/500 mm (DS*3  12.5 : 1)
IT-545N   :Ø40/500 mm (DS*3  12.5 : 1)
IT-545S   :Ø2.5/30 mm


IT-545NH : Twin beam laser marker (Class 2)
IT-545N   : Twin beam laser marker (Class 2)
IT-545S   : LED spot marker

Operating temp. & humidity

0 to 50℃, 35 to 85% RH, no condensation

Dimensions / Mass

40(W) x 170(L) x 36(H) mm / Approx. 140 g (batteries included)

*1: Fahrenheit and Celsius displays are available for the Americas.
*2: Temp. 18 to 28℃, Humidity 55%RH, Emissivity (Ɛ)=1.00
*3: DS = Distance to spot size