Hioki FT3700-20 Infrared Thermometer for Safe and Fast Non-Contact Temperature Measurement
When technicians need to measure temperature on energized equipment, moving parts, HVAC outlets, or hard-to-reach surfaces, contact measurement is not always practical or safe. The Hioki FT3700-20 Infrared Thermometer is designed to make those checks easier by providing non-contact surface temperature measurement with a two-beam laser marker for clearer targeting. Hioki presents the FT3700 and FT3701 as industrial-use infrared thermometers that identify surface temperature by measuring emitted infrared energy without physically touching the object.
One of the FT3700-20’s biggest advantages is its ability to improve safety and convenience in the field. Hioki highlights that the instrument is well suited for measuring targets in locations that are hazardous, difficult to reach, or risky to touch directly, including areas with moving parts, electric shock hazards, or limited access. The product page also notes common use cases such as checking the temperature of an air-conditioner outlet, a circuit breaker in a distribution panel, or an operating motor.
The FT3700-20 is also built for easy targeting and one-touch operation. Hioki states that the thermometer uses a two-point laser marker to help users identify the measurement location more reliably, while the simple pistol-style design allows measurement by just pulling the trigger and holding the reading after release. Hioki also describes the instrument as having an easy-to-see display and a full menu of basic measuring functions for everyday field work.
From a measurement standpoint, the FT3700-20 offers a range of -60.0 °C to 550.0 °C with 0.1 °C resolution, 1-second response time, and emissivity compensation from 0.10 to 1.00 in 0.01 steps. Hioki specifies a distance-to-spot ratio of 30:1, corresponding to a measurement field diameter of 100 mm at 3000 mm, making it useful for temperature checks at a distance across a broader target area. The instrument also includes MAX, MIN, DIF, and AVG functions, along with alarm, backlight, continuous measurement mode, and auto power-off.
Hioki positions the FT3700-20 as the long-focus model for measuring temperature over a wide area, while the FT3701-20 is the precise-field version intended for more focused spot measurement. That makes the FT3700-20 a strong fit for general maintenance, HVAC, electrical inspection, and industrial troubleshooting tasks where users want quick, safe, and reliable non-contact temperature measurement over a broader field.
For electricians, maintenance teams, HVAC technicians, and industrial service professionals, the Hioki FT3700-20 offers a practical combination of safe non-contact measurement, simple operation, and dependable field usability. Its laser targeting, wide-area long-focus design, and broad temperature range make it a useful tool for everyday inspection and troubleshooting work.
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