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Reed Instruments SD-1128 Light Meter w/ SD Card Data Logging

Light Meter w/ SD Card Slot for Data Logging

Reed Meter Measuring Light Levels and Temperature with External Thermocouple Probe

Part Number: SD-1128

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  • Measures and Records Light (with Included Sensor) and Temperature (with External Sensor Sold Separately)

  • Selectable Measurement Range of 0 to 2,000, 0 to 20,000 or 0 to 100,000 LUX

  • LCD Display Shows Current Readings, Max and Min Readings and Battery Status

  • Recorded Data Logs to SD Card with Easy Analysis Using Microsoft® Excel®

  • 1 Second to 1 Hour User-Selectable Sampling Rate

  • Powered by User-Replaceable Batteries with Optional AC/DC Powered Adapter (#AP-9VA-110V)

Includes Light Sensor Probe

Availability: In stock

  • Buy 10 for $179.55 each and save 5%

Light Meter and Data Logger Specifications

Light (2,000 Lux) In-Range Display: 0 to 1,999 Lux (0 to 186Fc)
Accuracy: ±0.4% + 2 Digits (±0.4% + 2.0Fc)
Resolution: 1 Lux (0.1Fc)
Light (20,000 Lux) In-Range Display: 1,800 to 19,990 Lux (167 to 1,860Fc)
Accuracy: ±0.4% + 2 Digits (±0.4% + 2.0Fc)
Resolution: 10 Lux (1.0Fc)
Light (100,000 Lux) In-Range Display: 18,000 to 99,900 Lux (1,670 to 9,290.7Fc)
Accuracy: ±0.4% + 2 Digits (±0.4% + 2.0Fc)
Resolution: 100 Lux (10Fc)
Type K Thermocouple Range: -50°C to 1300°C (-58°F to 2372°F)
Accuracy: ±0.4% + 0.5°C (±0.4% + 1.0°F)
Resolution: 0.1°C (0.1°F)
Type J Thermocouple Range: -50°C to 1200°C (-58°F to 2192°F)
Accuracy: ±0.4% + 0.5°C (±0.4% + 1.0°F)
Resolution: 0.1°C (0.1°F)
External Inputs (1) Light Sensor - Included
(1) Thermocouple Input (Type J or Type K) - Sold Separately
Data Storage Capacity 1GB to 16GB onto External SD Card (Sold Separately)
Sampling Rate 1 Second to 1 Hour
LCD Display Type: Backlight
Size: 52mm x 38mm (2.04" x 1.49")
Download Time Dependent Upon Size of SD Card
Power Source Battery: (6) 1.5 Volt Heavy Duty Alkaline AA
AC/DC Power: Optional 9 Volt Adapter (#AP-9VA-110V)
Battery Life Without LCD and SD Card: 155 Hours on Average
With LCD and SD Card: 35 Hours
Battery Classification Dry Battery, Non-Hazardous
Case Material ABS Plastic
Operating Range Temperature: 0°C to 50°C (32°F to 122°F)
Humidity: < 85% RH
Standards Compliance CE, IP63, CIE69 (Sensor)
Weight 375 grams (0.83 lbs) Including Sensor
Dimensions Meter: 177mm x 68mm x 45mm (6.9" x 2.6" x 1.7")
Light Sensor: 76.2mm x 50.8mm x 19.05mm (3.0" x 2.0" x 0.75")

Customer Reviews

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  • Answer:

    Using only battery power the logger can record for up to 155 hours if you don't use the LCD screen.  If you use the LCD screen the battery life is up to 35 hours.  These run times are when using an SD card.

    The only time memory capacity comes into play with a 16 GB card is when using the AC adaptor and even then a 16 GB SD card will hold more data than most people want to deal with.

    Reed doesn't publish a total capacity using an SD card but the looking at the way that the logger creates its file structure tells me that the total number of readings is very high.  When a new SD card is inserted the logger formats the card and creates a folder and in that folder it creates a file.  Each file contains 30k rows of data.  After the last row of data is written it creates another file with the same capacity.  Each folder can contain 99 files (each with 30k rows) before a new folder is created.  The maximum number of folders is 10 so you end up with a total of almost 30 million readings.  Keep in mind that this varies depending on the values you record and how much space it can create on the SD card so it's just an estimate.  

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  • Answer:

    Yes, the data gives you the time and date for each recorded data point.

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