Key facts
- Brand
- EXTECH
- Model
- HD450
- Documents
- 2
- Languages
- EN
- Last added
- 2026-10-03
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Extech HD450 Heavy Duty Datalogging Light Meter User's Guide
The Extech HD450 is a heavy-duty datalogging light meter designed to measure illuminance in Lux and Foot candles (Fc). It features an internal memory capable of storing up to 16,000 readings for download via its included USB PC interface and Windows-compatible software. The device also allows users to view up to 99 readings directly on the LCD display.
Read onlineEXTECH HD450 specifications
| 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) |
Source: Extech HD400 and HD450 Heavy Duty Light Meters Product Leaflet
All EXTECH HD450 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many readings can the HD450 store?
The HD450 can automatically store up to 16,000 continuous readings and manually store or recall up to 99 selected readings.
From: Extech HD400 and HD450 Heavy Duty Light Meters Product Leaflet
What is the measurement accuracy of the HD400 and HD450 meters?
Both meters provide an accuracy of ±5% of the reading.
From: Extech HD400 and HD450 Heavy Duty Light Meters Product Leaflet
What units can the HD450 measure?
The meter measures illuminance in Lux and Foot candles (Fc).
From: Extech HD450 Heavy Duty Datalogging Light Meter User's Guide
How many readings can be stored on the meter?
Up to 16,000 readings can be stored for download to a PC.
From: Extech HD450 Heavy Duty Datalogging Light Meter User's Guide