Hioki – LUX METER FT3425



The FT3425 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 FT3425 provides five measurement ranges, 20 lx to 200,000 lx, to support a wide range of luminance levels, and comes built in with Bluetooth® wireless technology.

Key Features

• Measured illuminance data is automatically sent to smartphone or tablet with Bluetooth® wireless technology (FT3425)

• Compatible with LED/OLED 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 Data can be downloaded to tablets and smartphones using Hioki’s dedicated apps available from the Google Play or App Store. Search for “HIOKI” and download the “GENNECT Cross” app.

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 , Buzzer sound, Backlight, Zero adjustment
InterfacesUSB 2.0 (FT3424/FT3425), Bluetooth® 4.0LE (FT3425 only)
Power supplyLR6 Alkaline battery ×2, Max. rated power 500 mVA, or R6 Manganese battery ×2, or USB bus power (5 VDC)
Continuous battery operation time300 hours (when using LR6 batteries, with Bluetooth® OFF), 80 hours (when using LR6 batteries, with Bluetooth® ON)
Dimensions and mass (including the batteries)78 mm (3.07 in)W × 170 mm (6.69 in)H × 39 mm (1.54 in)D,
310 g (10.9 oz, FT3424) / 320 g (11.3 oz, FT3425)
AccessoriesInstruction Manual ×1, AA/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, Precautions Concerning Use of Equipment that Emits Radio Waves ×1 (only FT3425)

Measurement ranges

RangeMeasurement rangeDisplay steps
20 lx0.00 lx to 20.00 lx1 count step
200 lx0.0 lx to 200.0 lx1 count step
2000 lx0 lx to 2000 lx1 count step
20000 lx00 lx to 20000 lx10 count step
200000 lx000 lx to 200000 lx100 count step

Countries and regions where wireless operation is currently supported (FT3425)Last up date: Feb. 22, 2018

Wireless certificationJapan, United States, Canada, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, Thailand, Singapore, Korea, Chile, and Mexico
Exempt from the wireless regulationsViet Nam, Hong Kong, Macao, India, Russian Federation, Colombia, Pakistan, Vanuatu, Peru, and Georgia

Download Technical Data

Additional information