The Thermochron™

The Thermochron iButton™ is a complete temperature data logger encased in a rugged stainless steel case. It contains a digital thermometer, a calendar clock, a battery, and memory to log temperature samples for a typical period of 34 days.

It withstands harsh environments of dirt, water, grease, freezing, and rough physical treatment. It can be reused over and over, - with a service life of 3 to 10 years.

The Thermochron iButton communicates by touching. It's shape is self aligning with a cup shaped probe.
An example of a plastic mounting method. Other ways to attach the iButton are available.
Data can be accessed while it is affixed to a container
Contact the Thermochron with the probe. Transfering data only requires a few seconds.

Thermochron iButton™ Specifications:

Manufacturer: Dallas Semiconductor Maxim
Part Number: DS1921

Physical
Diameter: 17.35 mm
Thickness: 5.89 mm
Weight: 3.3 grams
Hermetic Seal: Rated IP68: 1 meter of water for 1 hr.
Service Life: Approx. 1,200,000 Temperature Samples
or 3 yrs. to 10 yrs.
Temperature Range: -40 degrees C to +85 degrees C
Accuracy: +/- 1 degree C (-20 degrees C to +80 degrees C)
Resolution: 0.5 degrees C
Clock Accuracy: +/- 2 minutes/month from 0 degrees to 45 degrees
Maximum Number Of Readings Per Mission: 2,048
Serial Number: 12 Digits, Globally Unique
Safety: Meets USA UL#913 (4th Edition); Intrinsically
Safe Apparatus, approval under Entity Concept for use in
Class I, Division 1, Group A,B,C and D Locations (Dallas
Semiconductor Pending)

You can program these functions in the Thermochron:

Sample Rate: Choose from 1 minute to 255 minutes. The Thermochron will store up to 2,048 samples. So a 1 minute sample rate will allow you to record for 1.4 days, and a 255 minute sample rate, for 362 days.

Mission Delay: You can delay the start of the mission, eg. 6 hours.

Rollover: If this function is enabled, the 2,048 reading memory will be overwritten. Rollover begins at the beginning of memory. This is a useful feature as there will always be a record of the last 2,048 readings when you view the memory.

User Label: You can store an alphanumeric label in the Thermochron to provide quick identification (eg. "Freezer", "Bag 6", "Vaccine3").

Time: The date and time from the Palm™ clock is loaded into the Thermochron when launched, (eg. m/d/y "01/24/2002 09:08:26 am")

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Tel: (905) 377-8915
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