Ordering information, specifications, and features for the Extech HD400 and HD450 heavy‑duty light meters.
The Extech HD400 and HD450 are heavy‑duty light meters calibrated to NIST standards. The HD400 is a standard meter, while the HD450 adds datalogging capability and a larger backlit LCD display. Both models feature a rugged double‑molded housing and a built‑in USB port for PC connectivity.
Key features include a wide measurement range (up to 40,000 Fc or 400,000 Lux), cosine and color‑corrected measurements, peak and relative modes, and min/max data hold. The HD450 can automatically store up to 16,000 readings and manually recall up to 99 readings. Accessories include a light sensor with a 3 ft cable, protective cover, Windows‑compatible software, a hard carrying case, and a 9 V battery.
| Fc Range | 40, 400, 4000, 40.00kFc |
|---|---|
| Lux Range | 400, 4000, 40k, 400kLux |
| Accuracy | ±5% rdg |
| Max Resolution | 0.01Fc/0.1Lux |
| Datalogging (HD450) | 16,000 continuous readings; 99 selected readings |
| PC Interface | USB |
| Dimensions | 6.7 x 3.1 x 1.6 in (170 x 80 x 40 mm) |
| Weight | 13.7 oz (390 g) |
The HD450 can automatically store up to 16,000 continuous readings and manually store or recall up to 99 selected readings.
Both meters provide an accuracy of ±5% of the reading.
Yes, the HD450 has a built‑in USB port and a PC interface via USB.