Extech Datalogging Heavy Duty, 400,000 Lux Light Meter - HD450

In stock

The HD450 measures illuminance in Lux and Foot candles (Fc) up to 400,000 Lux. The HD450 is a Datalogger and includes a PC interface and Windows compatible software for downloading data.

Extech Datalogging Heavy Duty, 400,000 Lux Light Meter -  HD450

Light meter with double molded housing and large backlit display with 40-segment bar graph


  • Automatically stores up to 16,000 readings or manually store/recall up to 99 readings
  • Large backlit LCD display with 40-segment bar graph
  • Wide range to 40,000Fc or 400,000 Lux
  • Cosine and color corrected measurements
  • Utilizes precision silicon photo diode and spectral response filter
  • Peak mode (10µS) captures highest reading
  • Relative mode indicates change in light levels
  • Min/Max and Data Hold
  • Backlight for readings in low light levels
  • Heavy Duty rugged double molded housing
  • Includes Windows software
  • Built-in USB port
  • 3 Year warranty.

The HD450 measures illuminance in Lux and Foot candles (Fc). The HD450 is a Datalogger and includes a PC interface and WindowsTM compatible software for downloading data. Up to 16,000 readings can be stored on the meter for download to a pc and 99 readings can be stored and viewed directly on the meter’s LCD display. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

The HD450 meter can be connected to a PC via its USB interface. A USB cable, along with WindowsTM software, is included with the meter. The software allows the user to:

  • Transfer previously stored readings from the meter’s internal memory to a PC
  • View, plot, analyze, store, and print readings data
  • Remotely control the meter via virtual software buttons
  • Record readings as they are taken. Subsequently, printing, storing, analyzing and readings data

Meter to PC Connection

The supplied USB cable is used to connect the meter to a PC. Connect the smaller connector end of the cable to the meter’s interface port (located under the tab at the left hand side of the meter). The larger connector end of the cable connects to a PC USB port.

Program Software

The supplied software allows the user to view readings in real-time on a PC. The readings can be analyzed, zoomed, stored, and printed. Please refer to the HELP UTILITY available from inside the software program for detailed software instructions.

General Specifications

  • Display 4000 count LCD display with 40 segment bargraph
  • Ranging Four ranges, manual selection
  • Over range indication LCD displays ‘OL’
  • Spectral response CIE photopic (CIE human eye response curve)
  • Spectral accuracy Vλ function (f’1 ≤6%)
  • Cosine response f’2 ≤2%; Cosine corrected for angular incidence of light
  • Measurement Repeatability ±3%
  • Display rate Approximately 750 msec for digital and bargraph displays
  • Photo detector Silicon photo-diode with spectral response filter
  • Operating conditions Temperature: 32 to 104oF (0 to 40oC); Humidity: < 80%RH
  • Storage conditions Temperature: 14 to 140oF (-10 to 50oC); Humidity: < 80%RH
  • Meter Dimensions 6.7 x 3.2 x 1.6" (170 x 80 x 40mm)
  • Detector Dimensions 4.5 x 2.4 x 0.8” (115 x 60 x 20mm)
  • Weight Approx. 13.8 oz. (390g) with battery
  • Sensor lead length 3.2’ (1m)
  • Low battery indication Battery symbol appears on the LCD
  • Power supply 9V battery
  • Battery Life 100hrs (backlight off)

Unit ship weight: 3Lbs

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