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Extech SD200 3-Channel Temperature Datalogger
From the Manufacturer
3-Channel Temperature Datalogger records data on an 2G SD card in Excel format for easy transfer to a PC for analysis. It features a Triple LCD that simultaneously displays 3 Type-K Temperature channels, and a selectable data sampling rate of 5, 10, 30, 60, 120, 300, and 600 seconds. Each stored reading includes a date and time stamp.-58 to 2372-Degrees F (-100 to 1300-Degrees C) Temperature range. Complete with (6) AAA batteries, 2G SD card, Universal AC Adaptor, (3) Type-K bead temperature probes, and mounting bracket.
Christopher Boyd
2025-05-27 14:09:04
Product works decent, but not the most user friendly. No on/off setting so batteries must me removed if not using.
Sam
2025-05-16 12:00:53
I've only used the SD200 a few times, but so far so good.The SD card logging seems to work well.My only complaint is that there is no on/off switch, so I have to unscrew the back and remove the batteries before putting the logger away.
G. I. Evenden
2025-05-11 14:55:41
This device works as advertise right out of the box. I find the use of the SD card the most handy way of transporting the data from the logger to the computer and thus avoiding having to directly connect the logger to the machine and often having to use special access software. A minor caveat is the description of the format of the SD card as Excel compatible maybe in error. I was able to drag and drop the data into Linux's clone of Excel but could not load the data in a manner I normally associate with Excel files from Microsoft sources. The logger's output file is simply a text file in the format of an Excel screen.However, the SD file is in a format more suitable for my purposes and is readily input into Gnuplot or R for graphic display or analysis after filtering with a commonly available "newline" conversion filter.As another reviewer noted, there is no on/off switch so that if batteries are used they should be removed during periods of prolonged storage.
Chris Mason
2025-05-01 20:07:16
I can barely read the screen. This u nit is not up to the standard of other Extech products, I would give it a miss.
Customer
2025-03-18 14:08:54
This device met my expectationsPros: It works out of the box Accuracy of system appears to be +- 0.1 C or less Simple operation and good instructions Easy to use.Cons: When using open office spreadsheet, the spaces create formatting problems I first open the Extech spreadsheet in wordpad and remove all spaces but not the tabs. I can then use tab seperated variables to load a properly formatted spreadsheet in openofficeCalc.
James P. Trevelyan
2025-03-05 18:41:16
Apart from the minor irritations noted by other reviewers (need to remove batteries to switch it off, display can be hard to read), I found this unit performed really well. One of the stronger features is the thermocouple sensors that have very small welded tips providing rapid response to temperature changes, even in air. On my unit, all three sensors were within 0.1° C of each other making it a really nice device for small and rapid experimental investigations. The operating sequence is a little clunky but the data quality makes it all worthwhile. It even comes with an SD card and batteries!
Wayne Folta
2025-02-26 14:13:59
Great product! I use a Mac and didn't want to futz with PC-only programs for downloading data from a monitor, which most other monitors have. This one records to a memory card, which you can stick in you Mac (or PC), with an adapter, and the data is stored in files as a tab-separated table.The file names are *.XLS, but it's just tab-separated data, which I was able to read into R with no problems. It stores 30,000 lines (date, time, and reading for each probe) per file, then rolls over to a new file.I can definitely see noise of about +/- 0.5 degrees F, but that's not a big deal. I used it to monitor the water input and output temperatures, as well as the air output temperature, from our water-source heat pump. It's fascinating and useful. Seems reliable, and includes everything you need to get started.
Philip Hobbs
2025-02-10 10:00:11
This box is just what a temperature logger should be. Easy to set up, pretty accurate, and absolutely no muss, fuss, or bother. You tell it to log, and it just logs, with no bells and whistles.The data is stored to an SD card in human readable form that can be read by a spreadsheet, math program, or text editor.Brilliant.
Green Smurf
2025-01-26 11:45:22
Does what it says on the tin! I bought this to monitor the temperature rise over time of an experimental solar heating system for a pool. Logging to a memory card in csv format means extracting and manipulating the data is very easy in using excel. One VERY minor niggle is that the thermocouple probe wires are only 1metre long which is a bit mean given the cost of a couple of extra metres of wire. Otherwise very good.
Cambear
2025-01-11 14:38:24
This device exceeded expectations and the thermo-couples perform well. It is easy to use and extract and analyse its data.
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