Additional Features
Peak mode captures short light pulses to 100µs; and Relative function zeroes the sensor or can be used to display the difference from a reference value. Also has data hold, min/max, and auto power off functions.

What Is a Light Meter?
A light meter measures the amount of visible light, also known as illumination, in a given area. For many meter brands, including Extech, illumination is expressed in units of measure called Lux (for metric) and foot-candles (used in the US). To use an Extech light meter, the sensor is placed on a tabletop or other surface in the area to be measured and the light level reading is indicated on the meter’s display.

Specifications

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Additional Features

Backlit LCD display with 40-segment bar graph; peak mode (10 mS) captures the highest reading; relative mode indicates change in light levels; minimum/maximum; data hold; low battery indicator; and a built-in USB port for real-time monitoring and storage of light level data on a PC.

What Is a Light Meter?

A light meter measures the amount of visible light, also known as illumination, in a given area. For many meter brands, including Extech, illumination is expressed in units of measure called Lux (for metric) and foot-candles (used in the US). To use an Extech light meter, the sensor is placed on a tabletop or other surface in the area to be measured and the light level reading is indicated on the meter’s display. There are many different types of lighting that can be measured. the most common are: sodium, tungsten, mercury, and fluorescent. The following list shows common applications for each lighting type.

• Sodium lighting: Highway, parking lots, security measurements
• Tungsten lighting: Sunlight and incandescent lighting measurements
• Mercury lighting: Highways, parking lots, stadiums
• Fluorescent lighting: Indoor lighting for workstations and store display areas

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In this mode, measurements are made while the countdown timer is running. When the timer reaches zero, the last measurement is held on the display

Stray Light Inhibit

This feature allows the user to measure light from one source while automatically factoring out the light from a secondary (stray) unwanted source.

Integral Illuminance Mode

Integral Illuminance is a luminous energy measurement based on the rate of flow of flux (expressed in lumen-seconds). The Model EA33 can also measure any photometric quantity on a time dependent basis. For example, the illuminance could be integrated over time to yield lux-hours (lx-h) or foot candle-hours (fc-h).

Extech EA33 Features:

• EA33 Easyview Light Meter with Memory
• Wide measurement range to 99,990Fc (999,900Lux) with resolution of 0.001Fc and 0.01Lux
• Luminous intensity (candela) calculations
• Store and recall up to 50 measurements, includes relative or real time clock stamp
• Ripple function excludes the effect of stray light from the primary light source measurement
• Auto Power off with disable feature
• Multiple point average function
• Timed-Hold, Relative in absolute value or % deviation, and Comparator function with high low alarms
• Cosine and color corrected, CNS 5119 Class II
• Complete with built-in stand, light sensor and protective cover with 90cm cable, protective holster, 6 AAA batteries, and carrying case

Extech EA33 Specifications

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