Reference only — this item is no longer available. This product has been discontinued and cannot be ordered. We keep the page online so the specifications and documentation stay available to anyone still running the equipment. Current replacements are listed further down.

Discontinued

Light Meter Digital Auto Ranging 400,000 LUX (DT-1309) Data-Logging

Reference only — not for sale

Model	DT-1309
Manufacturer	CEM Meters
Category	Light / UV Meters
Status	Discontinued

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Product details (archived)

The information below is retained for reference only. This item is discontinued and cannot be ordered.

DT-1309 Auto-Ranging Digital Light meter is a precision instrument that is used to measure illuminance (LUX / Ft-cd) It meets the CIE photopic spectral response and it is fully cosine corrected for the angular incidence of light. The illuminance meter is compact, tough and easy to handle and use. The light sensitive component used in the meter is a very stable, and incorporates a long-life silicon photo diode and spectral response filter for best accuracy.

40-segment Analog bar graph
Light measurement to 400,000 LUX
High Accuracy and Fast response
Data-hold function holds measurement value
Auto zero function
Remote light sensor on 12" (305mm) coiled cable - expandable to 24"
Meter corrected for spectral relative efficiency
Built-in Correction factor for non-standard light sources
Peak-hold capture function for short duration light pulses
Auto power off after 20 minutes (can be disabled)
Max / Min measurements
Relative reading
Easy to read large backlit display
Threaded tripod mount
USB PC Interface Allows Data Logging on your PC
Auto ranging

Specifications:

Display : 3-3/4 digit LCD with high speed 40 segment bar graph
Measuring Range:
- 400.0 LUX (40 FC)
- 4,000 LUX (400 FC)
- 40,000 LUX (4,000 FC)
- 400,000 LUX (40,000 FC)
Max resolution: 0.1 LUX / 0.01 FC
Over range Display: LCD will show “OL” symbol
Spectral Response: CIE Photopic. (CIE human eye response curve)
Spectral Accuracy: CIE Vλ function f1’≤6%
Cosine Response: f2’ ≤2%
Accuracy:
- <10,000LUX: ±5% rdg ±10d
- >10,000LUX: ±10% rdg ±10d
Repeatability: ±3%
Sampling Rate: approximately 1.5 seconds
Photo Detector: Silicon photo diode and Spectral response filter.
Operating humidity range: 0 to 80% RH
Operating temperature range: 32° to 104° F (0° to 40° C)
Storage humidity range: 0 to 70% RH
Storage temperature range: 14° to 140° F (-10° to 50° C)
Storage Temperature & Humidity : 14° to 140° & 0 to 70% RH.
Power Source: 1 piece 9V battery
Photo detector Lead Length: 50" (approx.)
Dimensions:
- Meter: 6.7" x 3.1" x 1.6"
- Probe: 4.5” L x 1.5” D x 2.3” W
Weight: 14 oz. (390g)

Supplied with:

Rugged instrument enclosure
Carrying case with zipper
Instruction manual
USB cable (connects PC to meter)
Windows software on CD-ROM (Hardware Requirements: Windows 95/98/2000/XP Operating system 486 PC or above)
(1) 9v alkaline battery