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Extech
Extech LT300 Light Meter
Quote on request
No online payment · add lines to RFQ BOM
Light meter to 40,000 Fc / 400,000 Lux; ±(5%+0.5% FS). RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Fc Range
Up to 40,000 Fc
Lux Range
Up to 400,000 Lux
Max Resolution
0.01 Fc / Lux
Basic Accuracy
±(5% reading + 0.5% FS)
Cosine Color Corrected
Yes; precision photodiode + color filter
Sensor Cable
12 in (30.5 cm) coiled, expandable to 24 in (61 cm)
Fits general illuminance checks where you need an Extech LT300 covering up to 40,000 Fc / 400,000 Lux with cosine/color-corrected photodiode and Relative/Peak/Min/Max functions.
Key advantages
- Range — Up to 40,000 Fc / 400,000 Lux
- Resolution / accuracy — 0.01 Fc/Lux max; ±(5% reading + 0.5% FS)
- Sensor — Precision photodiode + color filter; cosine/color corrected
- Cable — 12 in coiled, expandable to 24 in
- Functions — Relative; Peak; Min/Max; Data Hold; backlight; bargraph
Typical applications
- Workplace lighting surveys.
- HVAC/IAQ illuminance checks.
- Quick Peak/Min/Max light readings.
Selection guide
- Fc vs Lux — Unit preference
- Peak / Relative — Function needs
- Sensor cable reach — To 24 in expanded
- Power — 9 V
Common mistakes
- Ignoring cosine correction positioning.
- Comparing to Class I lab photometers without uncertainty.
- Damaging sensor without cover.
When to RFQ / what to tell us
- Accessories; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 24788 |
| Brand | Extech |
| Model | LT300 Light Meter |
| Product type | Light Meter |
| Fc range | Up to 40,000 Fc |
| Lux range | Up to 400,000 Lux |
| Max resolution | 0.01 Fc / Lux |
| Basic accuracy | ±(5% reading + 0.5% FS) |
| Cosine/color corrected | Yes; precision photodiode + color filter |
| Sensor cable | 12 in (30.5 cm) coiled, expandable to 24 in (61 cm) |
| Functions | Relative; Peak; Min/Max; Data Hold; backlight; bargraph |
| Dimensions | 5.9 × 2.95 × 1.57 in (150 × 75 × 40 mm) |
| Weight | 7 oz (200 g) |
| Power | 1 × 9V battery |
| Warranty | 2 years (extech.com) |
Documents
FAQ
Q: Max range? A: 40,000 Fc / 400,000 Lux.
Q: Accuracy? A: ±(5% reading + 0.5% FS).
Q: What should I send for a quote? A: Accessories, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Fc Range | Up to 40,000 Fc |
| Lux Range | Up to 400,000 Lux |
| Max Resolution | 0.01 Fc / Lux |
| Basic Accuracy | ±(5% reading + 0.5% FS) |
| Cosine Color Corrected | Yes; precision photodiode + color filter |
| Sensor Cable | 12 in (30.5 cm) coiled, expandable to 24 in (61 cm) |
| Functions | Relative; Peak; Min/Max; Data Hold; backlight; bargraph |
| Dimensions | 5.9 × 2.95 × 1.57 in (150 × 75 × 40 mm) |
| Weight | 7 oz (200 g) |
| Power | 1 × 9V battery |
| Warranty | 2 years (extech.com) |