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Extech LT300 Light Meter with NIST
Item #:
EXT-LT300-NIST
Brand:
Extech
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LT300 Light Meter with NIST 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
| 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 |
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) |
