Check the listing for details. Mini 3-Channel USB Data Logger Internal External Temperature Humidity 32KReading. Condition: New. Listed at 85.00 USD. Note: we'll ship this item via SpeedPAK to US, Canada, UK and Australia, usually the delivery time is about 3 weeks; For other countries, we'll ship it via registered air mail of Post, usually the delivery time is about 40 days. If you want express mail service, please contact us for extra postage in advance. Battery is not included according to shipping company's requirement.BTH05 INTRODUCTIONThis data logger measures and stores temperature(one channel for internal, and another channel for external probe) and humidity readings. Some professional applications can be provided by the PC software DGraph. Logger status, alarm indication and low battery indication are via flashing red/green LED and yellow LED. The button on housing can be used to start logging, or confirm and clear LED alarm when LED alarm is hold status.User can plug data logger straight into PC’s USB port without any cables. Before getting started, user need to install USB driver and DGraph software, provided on the CD which is included in product packing box. All the software can run under Windows XP, Vista, 7 or 8(32 bit and 64 bit Versions). User can easily use DGraph software to setup sample rate(from 10 seconds to 12 hours), high/low alarm limit and start/stop method , and download data to PC, etc. And then user can view, analyse and print the data, or export other file formats(txt, xsl, csv, bmp, jpg).Especially, for some professional applications, user can set access password, name each channel, enable/disable specified channel, input calibration data for each channel, disable LED indication for saving power, and select sample mode(Instant, Average, Maximum and Minimum), etc. APPLICATIONSThis data logger is used mainly to monitor and verify humidity&temperature-sensitive goods, equipment or areas. Example: Cold Chain Refrigeration Transport HVAC Food&Pharmaceutical Warehouse FEATURESWith an external temperature probe, the length of 2m(or customized)Portable, precise, compact and low costUSB interface directly communicate with PC for setup and data downloadUnique and uniform PC control software: DGraphEach unit has single serial numberUser can set access password fo each data loggerAlarm and status indication via LEDStart logging method: Immediately, Button, Start atReplaceable lithium battery and data is not lost if exhaustedTwo point calibration for each channelStart logging method: Immediately, Button, Start atReplaceable lithium battery and data is not lost if exhausted Alarm and status indication via LEDAlarm limit settings for all channelsUser can customize compound graphUser can customize new unit easilyUser can name each channel and enable/disable it SPECIFICATIONS Measurement Range: -35 to 80℃(-31 to 176℉)(Internal); 0 to 100%RH; -40℃~125℃(External)Accuracy(Typ.): ±0.3℃(±0. 5℉); ±3%; ±0.5℃(±0. 9℉)Resolution(Typ.): 0.1℃(0.2℉); 0.1%; 0.1℃(0.2℉);Memory Capacity: 64KBytes(Total 32,000 readings)Sample Rate: User selectable from once every 10 seconds to once every 12 hoursPC Software: DGraph software and USB driver required (Included in CD)Power Supply: User replaceable 1/2AA 3.6V lithium battery, 1200mAh (NOT INCLUDED)Battery Life: Approx. 3 Years @ 1 Minute Sample RateDimensions: 120mm×37mm×23mm(4.8"×1.5"×0.9")Case Material and Weight: ABS; Approx. 80 grams(2.82 oz)Size: 165 x105 x50mm Gross weight: 167g