Testo 540 Lux Meter: Range 0–99,999 Lux, Accuracy ±3%, Compact Design

The Testo 540 lux meter is a compact and easy-to-use device designed to measure both natural and artificial light. Ideal for spot checks in workplaces, offices, and retail spaces, it ensures compliance with lighting standards. Its sensor is modeled on the spectral sensitivity of the human eye, making it perfect for accurate assessments of light conditions. With several user-friendly features, the Testo 540 provides quick, precise readings for lighting control and safety management.

Key Features:

• Accurate Light Measurement:
  • Measures both natural and artificial light across a range of 0 to 99,999 lux or 0 to 9,300 ftc.
  • Sensor sensitivity matches the human eye for optimal accuracy in workplace conditions.
• Easy Operation:
  • Hold function to freeze the last reading for convenient data recording.
  • Min/Max values accessible with a button press to capture extreme measurements.
• Large, Clear Display:
  • Provides easy-to-read results in different lighting environments.
• Protective Cap:
  • Protects the sensor during transport and storage for long-lasting use.
• Long Battery Life:
  • 200-hour battery life on 2 AAA batteries ensures extended usage without frequent replacements.

Technical Specifications:

Light Measurement:

• Measuring Range:
  • 0 to 99,999 Lux
  • 0 to 9,300 ftc
• Accuracy: ±3 Lux or ±3% (compared to reference instrument at 90° light incidence)
• Resolution:
  • 1 Lux (0 to 19,999 Lux)
  • 10 Lux (remaining range)
• Measuring Rate: 0.5 seconds

General Technical Data:

• Dimensions: 133 x 46 x 25 mm
• Weight: 95 g (including batteries and protective cap)
• Operating Temperature: 0 to +50 °C
• Storage Temperature: -40 to +70 °C
• Battery Type: 2 AAA micro batteries
• Battery Life: 200 hours (without display illumination)
• Protection Class: IP40

What’s Included:

• Testo 540 Lux Meter
• Protective Cap
• 2 AAA Micro Batteries (pre-installed)
• Instruction Manual