HIOKI Lux meters – Precise Lighting Measurement for Workplaces
Why is measuring illuminance essential?
Lux meters – also called illumination meters or light meters – measure illuminance (lux) on a surface and are indispensable for facility managers, building operators and safety inspectors. In Europe, the standard EN 12464-1 (Lighting of indoor workplaces) defines minimum illuminance levels, uniformity, and glare limits to ensure both safety and visual comfort in offices, schools, hospitals or production facilities.
FT3424
FT3424 - Luxmeter, compatible with LED/OLED
The FT3424 Lux Meter is a highly accurate instrument designed to measure illuminance in various environments, ensuring that lighting conditions meet the required standards. Its compact, lightweight design and fast response time make it suitable for use in industries such as construction, facility management, and quality control. Technical Specifications:Classification: JIS C 1609-1: 2006 General Class AA, DIN 5032-7: 1985 Class BLight Receiving Element: Silicon photo-diode Display: 4-digit LCD, 2000 counts, Display update rate: 500 ms ±20 ms Measurement Ranges:
o 20 lx, 200 lx, 2000 lx, 20000 lx, 200000 lx
o Measurement steps: 1 mV DC / 0.01 lx to 100 mV DC / 100 lx Linearity: ±2% rdg (Multiply by 1.5 for values over 3000 lx) Accuracy: ±4% f.s. Response Time: Auto: within 5 seconds, Manual: within 2 seconds Output Specifications: D/A output, 1 mV resolution, Output rate: 500 ms Power Supply: 2 × AA (LR6) alkaline batteries or USB bus power 5 V DC Operating Temperature: -10°C to 40°C (14°F to 104°F), 80% RH or less Dimensions: 78 mm (W) × 170 mm (H) × 39 mm (D) Weight: Approx. 310 g (including batteries)
FT3425
FT3425 - Luxmeter, compatible with LED/OLED, Bluetooth
The FT3425 Lux Meter is a highly accurate instrument designed to measure illuminance in various environments, ensuring that lighting conditions meet the required standards. Its compact, lightweight design and fast response time make it suitable for use in industries such as construction, facility management, and quality control. The FT3425 comes with Bluetooth wireless technology for seamless data transfer.Technical Specifications:Classification: JIS C 1609-1: 2006 General Class AA, DIN 5032-7: 1985 Class B Light Receiving Element: Silicon photo-diode Display: 4-digit LCD, 2000 counts, Display update rate: 500 ms ±20 ms Measurement Ranges:
o 20 lx, 200 lx, 2000 lx, 20000 lx, 200000 lx
o Measurement steps: 1 mV DC / 0.01 lx to 100 mV DC / 100 lx Linearity: ±2% rdg (Multiply by 1.5 for values over 3000 lx) Accuracy: ±4% f.s. Response Time: Auto: within 5 seconds, Manual: within 2 seconds Output Specifications: D/A output, 1 mV resolution, Output rate: 500 ms Wireless Connectivity: Bluetooth 4.0LE Power Supply: 2 × AA (LR6) alkaline batteries or USB bus power 5 V DCOperating Temperature: -10°C to 40°C (14°F to 104°F), 80% RH or less Dimensions: 78 mm (W) × 170 mm (H) × 39 mm (D) Weight: Approx. 320 g (including batteries)
Product Comparison: Select your HIOKI lux meter
With a HIOKI lux meter such as the FT3424 or FT3425, you can easily verify compliance with EN 12464-1 – whether measuring LED and OLED light sources or conventional lamps. Both models deliver quick, accurate readings and support simple documentation, while the FT3425 also offers convenient wireless transfer via Bluetooth®.
Here is a simple overview of the two models, highlighting the key differences:
| Feature | FT3424 Lux Meter | FT3425 Lux Meter (incl. Bluetooth®) |
|---|---|---|
| Measurement Range | 0.01 to 200,000 lx | 0.01 to 200,000 lx |
| Response time | Auto range: within 5 seconds, Manual range: within 2 seconds | Auto range: within 5 seconds, Manual range: within 2 seconds |
| Data Handling | Manual reading, memory recall | Manual reading, memory + Bluetooth® |
| Highlights | Accurate, fast LED/OLED measurements | Same as FT3424 + Bluetooth® data transfer |
Made in Japan – Built for Lasting Precision
All HIOKI luxmeters are designed in Japan and manufactured at our own R&D center and factories. They stand for durability, precision, and long-term reliability trusted by technicians worldwide.