Computer logging of temperature and humidity in chamber

[wheels]

Thanks

[Brent]

No problem. I've been amazed how rugged those little guys are.

[JLPicard]

Look at this little thing:

http://www.dealextreme.com/p/temper-hum-usb-thermometer-temperature-humidity-recorder-for-pc-laptop-82776

Not much info or feedback on it though. No software comes with it but you can download the data into a spreadsheet it says.

Here's a second one: http://www.dealextreme.com/p/usb-powered-thermometer-hygrometer-40-120-c-42591

[Brent]

That's not exactly a logger. It needs to be plugged into a PC to gather data, it won't gather in a 'stand alone' sense. I suppose if you had a usb extension cable you could use it that way.

[JLPicard]

You'll want to make sure of a couple of things, the main one being the ruggedness of the RH sensor. Most won't ready much above 40 or 50C because they are simply a membrane sensor, and the membrane gets damaged when you go above that range.

When comparing instruments how can you tell what type of sensor the unit does have? As opposed to the 'membrane' sensor, what other types are there?

[vagreys]

...They should be in the $125 USD range in terms of pricing. We've used them for things like transport logging for milk and other refrigerated products, so they are really built well.

I'm seeing variations of this device on Ebay in the $75 range. Just query "Temperature and Humidity Data Logger".

Of course, this link will break, soon, but here's an example http://www.ebay.com/itm/PYLE-Meters-PTHDL150-Temperature-and-Humidity-Data-Logger-USB-Connection-/110830823216?pt=LH_DefaultDomain_0&hash=item19ce082730

[SausageBoy]

...They should be in the $125 USD range in terms of pricing. We've used them for things like transport logging for milk and other refrigerated products, so they are really built well.

I'm seeing variations of this device on Ebay in the $75 range. Just query "Temperature and Humidity Data Logger".

Of course, this link will break, soon, but here's an example http://www.ebay.com/itm/PYLE-Meters-PTHDL150-Temperature-and-Humidity-Data-Logger-USB-Connection-/110830823216?pt=LH_DefaultDomain_0&hash=item19ce082730

The exact model (minus the LCD display) for as little as $49.95 + $5.00 shipping......
http://www.ebay.com/sch/i.html?_from=R4 ... Categories

[JLPicard]

Ah, then you are in the right spot for logger types. If you're looking for something inexpensive, and pretty accurate, check out Lascar. I know you're in the UK, so this page won't mean much for buying, but it'll give you a good spec sheet on the product:

http://www.dataloggerinc.com/products/E ... ogger/171/

They should be in the $125 USD range in terms of pricing. We've used them for things like transport logging for milk and other refrigerated products, so they are really built well.

Hmm, I am wondering where this price came from then?

[Brent]

Not entirely sure how they can sell that low. I can tell you that we offer tech support after the fact.

To be honest, the Lascar line of products isn't what we focus on. We'ret more focused on higher end logging systems. We carry Lascar mainly for people who need transport logging and such.

As for sensors, there are actually companies that still make wet bulb sensors, as well as companies like Vaisala that make specialized probes that are designed for higher temperature environments. I'm not sure of the technology that Vaisala uses, but I know that they have meters that can measure humidity up into the 200 C range. Of course, when you get into that kind of specialized sensor, the price goes way up.