The Extech LT250W light meter comes with Bluetooth® integration, so building and maintenance professionals can view and share light intensity data directly from the ExView app on their mobile devices. Users can gain deeper insight about workplace comfort and building health by capturing data, displaying trends, setting alarms, and sending reports.

• Measure light intensity up to 100,000 Lux (10,000 Fc) with measuring rate of 0.5 sec
• Transmit, view, and share data directly from a mobile device via Bluetooth connection to the ExView app
• Record Max/Min readings
• Freeze display with ‘Data Hold’
• Save battery life with Auto Power Off feature
• Mount on tripod with standard 1/4″-20 mounting screw
• View data on both the bright, backlit RPM250W LCD display and from the app on iOS® or Android™ mobile devices (offers both day mode and dark mode)
• Connect up to eight compatible Extech Connected 250W Series meters to the app simultaneously
• Set up data recording and program high/low audible alarms through the app
• Export data in .CSV file format or send PDF reports—including photos of the measurement location—from the app
• Comes complete with 3 AAA (1.5 V) batteries

ExView® App Enables Remote Data Collection and Reporting With Multiple Devices

Extech has launched a new mobile app that will make data collection and analysis easier than ever before with its 250W-Series of environmental meters – the ExView App. This app allows you to monitor a variety of environmental conditions from outside safe or hard-to-reach areas. It connects with up to eight meters at once. You will be able to monitor key readings throughout your facility and easily share them with your team whether you’re using several LT250W light meters, AN250W aneometers, or other new 250W-Series meters.

With the ExView App, you are able to read and log measurements remotely in real time. In addition, you can create detailed PDF reports that can be shared and saved. When you connect your meters to a mobile device, you can easily collect data, create graphs, and add information to customer reports. Also, you can use your smartphone or tablet for remote viewing in difficult-to-access areas or for sharing results with others.

Integration With the Extech W Series

Extech W Series meters that include Bluetooth® connectivity were designed for seamless integration with the ExView App. In addition to displaying trends, setting alarms, creating and sending reports, users can gather deeper insights on equipment and building health.

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The LT300 Light Meter measures up to 40,000 Fc (or 400,000 Lux) utilising a remote light sensor connected via 12 in. coiled cable (expandable to 24 in.).

A prominent LCD readout displays a digital calculation and complementary analogue bar graph for quick, reliable assessments.

Complete with 9V battery, light sensor with protective cover, protective holster, and soft case.

Measurement Procedure

1. Remove the protective cap from the sensor so that the white domed light sensor is exposed to the light. For overhead lighting, the sensor can be placed on a desk or table top. A tripod
mount and a tilt stand are located on the rear of the meter for convenience.
2. The display will indicate the light level in Fc or Lux.
3. Press the RANGE button to select the range that provides the maximum resolution. If the ‘OL’ appears the light measurement is out of range. Select another range using the RANGE button.
4. Press the backlight button to illuminate the LCD display if needed.

Extech LT300 Lux Meter Features:

• Wide range to 40,000Fc or 400,000 Lux with max resolution to 0.01 Fc/Lux
• Relative mode indicates change in light levels, peak mode captures highest reading
• Remote light sensor on 12″ (30.5cm) coiled cable – expandable to 24″ (61cm)
• Utilises precision photo diode and colour correction filter
• Large LCD display with analogue bargraph
• Backlight for readings in low light levels
• Complete with 9V battery, light sensor with protective cover, protective holster, and soft case

Extech LT300 Lux Meter Specifications:

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Lux is the unit measurement of illuminance and luminous emittance in the International System of Units (SI). One Lux (Latin for “light”) is the amount of illumination provided when one lumen is evenly distributed over an area of one square metre.

One foot-candle is equal to one lumen per square foot or approximately 10.764 Lux. In practical applications it is sufficient to think of one foot-candle as about ten lux as is typically done in the lighting industry.

Extech LT510 Light Meter Features : 

• Measure light levels in Foot-Candle (Fc) or Lux units using a precision photo diode with cosine and colour correction filter
• Zero function
• Backlit LCD to view in dimly lit areas
• Data Hold and Min/Max functions
• Auto power off with disable
• Tripod mount (optional TR100 Tripod sold separately)
• Complete with light sensor cover, wrist strap, and three AAA batteries

Extech LT510 Light Meter Specification:

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Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays. UV radiation constitutes about 10% of the total light output of the Sun, and is thus present in sunlight. It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.

What is the difference between UVA, UVB and UVC?

The three types of UV radiation are classified according to their wavelength. They differ in their biological activity and the extent to which they can penetrate the skin. The shorter the wavelength, the more harmful the UV radiation. However, shorter wavelength UV radiation is less able to penetrate the skin.

Short-wavelength UVC is the most damaging type of UV radiation. However, it is completely filtered by the atmosphere and does not reach the earth’s surface.

Medium-wavelength UVB is very biologically active but cannot penetrate beyond the superficial skin layers. It is responsible for delayed tanning and burning; in addition to these short-term effects it enhances skin ageing and significantly promotes the development of skin cancer. Most solar UVB is filtered by the atmosphere.

The relatively long-wavelength UVA accounts for approximately 95 per cent of the UV radiation reaching the Earth’s surface. It can penetrate into the deeper layers of the skin and is responsible for the immediate tanning effect. Furthermore, it also contributes to skin ageing and wrinkling. For a long time it was thought that UVA could not cause any lasting damage. Recent studies strongly suggest that it may also enhance the development of skin cancers.

Extech UV510 UltraViolet (UVA) Light Meter Features:

• Sensor wavelength range 320 to 390nm
• UV sensor with cosine correction measures irradiance from UVA light sources up to 20.00mW/cm²
• Backlit LCD to view in dimly lit areas
• Zero function
• Data Hold and Min/Max functions
• Auto power off with disable
• Tripod mount (optional TR100 Tripod sold separately)
• Complete with wrist strap, light sensor cover, and three AAA batteries

Extech UV510 UltraViolet (UVA) Light Meter Specifications:

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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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