Non-contact Infrared Thermometer Sharply Focus on Measurement Spots with Two-Beam Laser Marker, Ideal for HVAC Applications

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Model No. (Order Code)

FT3700-20Long-focus type
FT3701-20Long focus, precise-field type

Note: Laser Product Caution Notice A caution label is attached to the thermometer. Be sure to observe the operating precautions on the label.



The FT3700 and FT3701 are non-contact thermometers using infrared rays, accurately pinpointing the spot with a two-beam laser marker. The infrared temperature guns identify the surface temperature of an object by measuring the energy level of the infrared rays emitted from the object without physically coming in contact with it.

Key Features

• Pistol design with easy-to-see display
• A full menu of basic measuring functions
• Easily test in difficult locations, moving objects or where there is danger of electric shock



How to Use the Hioki Infrared Thermometer FT3700/FT3701

Basic introduction to using a Hioki infrared thermometer
Introduces how to use Hioki's FT3700/FT3701 Infrared Thermometer, from activating the laser marker and setting the emissivity to making measurements. The instrument makes it easy to measure the temperature of targets such as an air-conditioner outlet some distance away, a circuit-breaker in a distribution panel that poses the risk if touched, and an operating motor.



Choose according to your measurement location Two Models

FT3700-20: Long-focus, For measuring temperature over a wide area
FT3701-20: Long-focus, Precise-field, For measuring temperature at a single point

Identify the measurement location reliably Two-point laser marker



Non-contact infrared thermometer featuring simple, one-touch measurement

Easy operation: just pull the measurement trigger
Release it to hold the measured value



Since the instrument measures radiation temperature, it’s easy to make readings in hazardous or unreachable locations

Locations that cannot be touched due to moving parts
Locations that pose the risk of electric shock
Unreachable locations

It’s optimal for measuring temperature anywhere



Basic specifications (Accuracy guaranteed for 1 year)

Measurement temperature range-60.0 to 550.0 ˚C (-76 to 1022 ˚F), 0.1 ˚C resolution-60.0 to 760.0 ˚C (-76 to 1400 ˚F), 0.1 ˚C resolution
Accuracy-35.0 to -0.1 ˚C (-31.0 to 31.9 ˚F) : ±10 %rdg. ±2 ˚C
0.0 to 100.0 ˚C (-32.0 to 212.0 ˚F) : ±2 ˚C
100.1 to 500.0 ˚C (212.1 to 932.0 ˚F) : ±2% rdg.
Note) -60.0 to -35.1 ˚C (-76.0 to -31.1 ˚F), and over 500.1 ˚C (932.0 ˚F) : Accuracy not specified
Response time1 sec (90%)
Measurement wavelength8 to 14 µm
Thermal emissivity compensationε=0.10 to 1.00 (0.01 step)
Measurement field diameterε=0.10 to 1.00 (0.01 step)φ 100 mm at 3000 mm (3.94 in at 9.84 ft)
(Distance : Spot = 30 : 1)
SightingTwo-beam laser marker Max 1 mW (class 2), Red
FunctionsContinuous measurement mode, MAX/ MIN/ DIF (MAX - MIN)/ AVG measurement, Alarm, Backlight, Auto power-off
Power supplyLR03 (AAA) alkaline battery ×2, 150 mVA, Continuous use of 140 hours (With laser marker, backlight and buzzer are OFF)
Dimensions and mass48 mm (1.89 in) W × 172 mm (6.77 in) H × 119 mm (4.69 in) D, 256 g (9.0 oz), (including batteries)
AccessoriesInstruction manual ×1, LR03 alkaline battery ×2, Carrying case ×1






Declaration of Conformity


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Measuring Air Conditioner Outlet Temperature 

Measuring Motor Shaft Temperature 

There are no drivers, firmware or software available for this product.