Extech LT300 Light Meter

Item #:

EXT-LT300

Brand:

Extech

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Description

LT300 Light Meter by Extech

Measures light intensity up to 40,000 Foot-candles or 400,000 Lux with high resolution to 0.01 Fc/Lux. Ideal for indoor lighting tests and for checking security and safety illumination in parking garages, night time ATM areas, stairwells, landings, and hallways.

Features

Relative mode indicates change in light levels
Peak mode capture highest reading
Remote light sensor on 12" (30.5cm) coiled cable - expandable to 24" (61cm)
Utilizes precision photo diode and color correction filter
Cosine and color corrected measurements
Measures up to 40,000Fc/400,000Lux with 0.01 rmax resolution and basic accuracy of ±(5% rdg + 0.5%FS)
MIN/MAX feature stores maximum and minimum readings
Data Hold freezes reading in the display
Large LCD display with analog bargraph
Backlight for readings in low light levels
Dimensions: 5.9 x 2.95 x 1.57" (150 x 75 x 40mm); Weight: 7oz (200g)
Complete with 9V battery, light sensor with protective cover, protective holster, and soft case

Specifications

General Specifications

Display	Multi‐function 3‐3/4 (3999) digit LCD with Bargraph indicator
Over range indication	LCD displays 'OL'
Spectral response	CIE photopic (CIE human eye response curve)
Spectral accuracy	CIE V function (f’₁, 6%)
Measurement Repeatability	±2%
Temperature coefficient	±0.1% per °C
Sampling rate	13.3 times per second (Bargraph); 1.3 times per second (digital display)
Photo detector	Silicon photo-diode and spectral response filter
Peak hold	Capture light peaks to 10μS
Operating conditions	Temperature: 0 to 40°C (32 to 104°F); Humidity: < 80%RH
Storage conditions	Temperature: (-10 to 50°C (14 to 140°F); Humidity: < 80%RH
Dimensions	165 x 76 x 43mm (6.5 x 3.0 x 1.7")
Weight	Approx. 403g (14.2 oz.) with battery installed
Low battery indication	Battery symbol appears on the LCD
Power supply	9V battery

Range Specifications

	Ranges and Resolution	Accuracy
Lux	40.00, 400.0, 4000, 40.00k, 400.0kLux	± (5% Rdg + 0.5% Full Scale)
Foot candle (Fc)	40.00, 400.0, 4000, 40.00kFc	± (5% Rdg + 0.5% Full Scale)