Light Meter with Broad Coverage from Low to High Illuminance

The FT3424 is a light meter designed for an extensive range of applications involving illumination equipment, lighting work and facility management. Capable of testing even LED lighting, the FT3424 provides five measurement ranges, 20 lx to 200 000 lx, to support a wide range of luminance levels. Key Features • Compatible with LED lighting • Complies with DIN 5032-7:1985 class B and JIS C 1609-1:2006 general AA class • Timer hold function lets you make measurements in remote locations while avoiding the effects of shadows and reflections • Save up to 99 measured values in the instrument’s internal memory and transfer them to a computer later for improved work efficiency

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How to Use the Hioki Lux Meter FT3424

Basic introduction to using a Hioki lux meter Introduces how to use Hioki's FT3424 lux Meter, from zero-adjustment and the hold function to making measurements. Since the instrument’s memory function lets it store measured values, there’s no need to take notes by hand in the field. In addition, a timer hold function and connection cable make it possible to measure illuminance after moving away from the instrument.

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Measure illuminance free of the effects of shadows

1. Timer hold function Retain the measured value after a user-configured amount of time has elapsed from the time the TIMER key is pressed. In this way, you can time measurement to occur after you have moved away from the lux meter so that measurement is not affected by clothing, shadows, etc. Timer settings: Select from 5 / 10 / 15 / 20 / 30 / 45 / 60 sec. After the set time has elapsed, the measured value is retained. → The backlight turns on and the beep sounds for 3 sec. 2. Measurement with sensor and display units undocked You can undock the display and sensor units for more convenient use. Simply connect them with the Connection Cable L9820 (option).

Support for measurement of 1 lx makes the FT3424 ideal for low-illuminance measurement

20 lx range measurement resolution 0.01 lx

Memory function makes multipoint measurement a breeze

1.Memory function (up to 99 values) Save measured values for multiple measurement locations in the instrument’s internal memory on the spot for later display at your convenience. There’s no need to take time to jot down a reading on paper for each measurement. 2.Data communications functionality Transfer data saved in the instrument’s internal memory to a computer via a USB connection. Data can be saved as a text file.

■ Basic specifications (Accuracy guaranteed for 2 years, Post-adjustment accuracy guaranteed for 2 years)

StandardsDIN 5032-7: 1985 class B, JIS C 1609-1: 2006 general AA class
Light receiving elementSilicon photo diode
Range selectionAuto/ Manual
Linearity±2% rdg. (Multiply by 1.5 for display values in excess of 3000 lx.)
Accuracy guarantee for temperature and humidity21 °C to 27 °C (69.8 °F to 80.6 °F), 75% rh or less (non-condensing)
Response timeAuto range: within 5 seconds, Manual range: within 2 seconds
D/A outputOutput level: 2 V/range f.s. (2.5 V is output when the range f.s. is exceeded.)
Output accuracy: ±1% rdg. ±5 mV (at display count)
FunctionsTimer hold function, Memory function (Up to 99 measured data can be saved.), Hold, Auto power off function, Buzzer sound, Backlight, Zero adjustment
Power supplyLR6 Alkaline battery ×2 (continuous use 300 hours), Max. rated power 500 mVA, or R6 Manganese battery ×2, or USB bus power (5 VDC)
Dimensions and mass78 mm (3.07 in)W × 170 mm (6.69 in)H × 39 mm (1.54 in)D, 310 g (10.9 oz) (including the batteries)
AccessoriesInstruction Manual ×1, LR6 Alkaline battery ×2, Sensor cap (with strap) ×1, Carrying case (soft) ×1, Strap (for instrument) ×1, USB cable (0.9 m/2.95 ft) ×1, CD (USB driver, dedicated computer application software, and communications specifications) ×1

■ Measurement ranges

RangeMeasurement rangeDisplay steps
20 lx0.00 lx to 20.00 lx1 count step
200 lx0.0 lx to 200.0 lx
2000 lx0 lx to 2000 lx
20000 lx0(0) lx to 2000(0) lx10 count step
200000 lx0(00) lx〜2000(00) lx100 count step

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Seminar Videos On Demand

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Catalog: LUX METER FT3424, FT3425 Download PDF  [3MB] English

User Guides

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Instruction Manual German
Instruction Manual French
Instruction Manual Japanese
Instruction Manual Simplified Chinese
Instruction Manual Korean

Outline Drawings

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Technical Notes

Declaration of Conformity



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C0202: For storing the instrument with the L9820, L9094, and USB Cable
C0201: For storing the instrument with the L9094 and USB Cable




Use when positioning the FT3424 sensor unit and display unit separately during use.


φ 3.5 mm (0.14 in) dia. mini plug to banana, 1.5 m (4.92 ft) length


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