iButton Maxim Dallas logo
The iButton is the world smallest and lower cost temperature data logger available. It is rugged, simple, reliable and surprisingly precise for a device of this price and size. It has been widely used in the food and pharmaceutical industries for almost 10 years.

It is available in several types for different temperature range, precision and memory size. Most are available in the iBCod submersible form for use down to 900 meters deep for the types G and Z and 100 meters for types 22L, 22T and 22E.iButton dimension Maxim Dallas

Arrow Texte One Wire Connexion Device
Arrow Texte Lowest cost temperature data logger
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 Arrow Texte NIST Certification available on internet
     for the Types 22

Key Features


● Weight:  Approximately 3.3 gr.
● Digital thermometer Built-in real-time clock (RTC) ● Timer has accuracy of ±2 minutes per month
   per month from 0°C to 45°C.
● Automatically wakes up and measures temperature at user-programmable
   intervals.
● Programmable temperature-high and temperature-low alarm trip points;
   records up to 24 time stamps and durations when temperature leaves the
   range specified by the trip points.
● 512 bytes of general-purpose read/write NV random access memory.
● Digital identification and information by momentary contact.
● Unique, factory-lasered and tested 64-bit registration number (8-bit
  family code + 48-bit serial number + 8-bit CRC tester) assures absolute
  traceability because no two parts are alike.
● Durable stainless-steel case engraved with registration number withstands
  harsh environments
● Meets UL#913 (4th Edit.). Intrinsically Safe Apparatus: approved under
  Entity Concept for use in Class I, Division 1, Group A, B, C and D Locations
● NEW NIST Certification available of all types 22 on Maxim Dallas Site  


Specifications:             
  Type Z  Type G  Type 22L  Type 22T  Type 22E  Type 23 
  High Resolution  General  Precision   High Temp. Higher Temp. Humidity & Temp. 
Range (°Celcius)  -5 to 26  -40 to 85  -40 to 70 0 to 125  0 to 140  -20 to 85
Precision (°C) 
      See Note 1		 +/- 1 °C +/- 1 °C  +/- 0.5 °C  Note 2  Note 3 +/- 1 °C 
Resolution (°C)  0.125°C  0.5°C   0.5 or 0.0625   0.5 or 0.0625  0.5 or 0.0625  0.5 or 0.0625   
Memory (Values)  2048  2048  8192 or 4096 with high res.  8192 or 4096 with high res.   8192 or 4096 with high res.   8192 or 4096 with high res.  
Record Interval (minutes) 1 to 255  1 to 255  1 sec. to 273 hours  1 sec. to 273 hrs   1 sec. to 273 hrs   1 sec. to 273 hrs  
Start Delay  44 days  44 days  10 years  10 years   10 years   10 years  
Histogram  2 °C Resolution 2 °C Resolution  Not available  Not available   Not available   Not available  
Humidity measurement  Not available   Not available   Not available   Not available   Not available   0 to 100% RH  
Pricing in CAD (each)            
Quantity 1 to 24  $32 $32 $65 $99 $129 $129
25 to 99   $28 $28 $57 $90 $110 $110
100 to 999   $25 $25 $52 $79 $96 $96
Over 1000  $21 $21 $47 $68 $84 $84
NIST Certification n/a n/a NIST NIST NIST n/a
Detailed specifications from Maxim Dallas  PDF   PDF  PDF PDF PDF PDF

For the submersible version see the iBCod.
Software information for the iButtons and iBCod see following link.

Related Devices
iButton Kit The iButton evaluation kit includes a connector, one USB adaptor, one iButton type G or Z and a CD-ROM with free software and one evaluation version of the advanced software ThermoTrack for traceability. Pricing  (CAD):
1 to 24:     $75  
25 to 99:   $70
100 to 999: $65
Over 1000: $60		 ibutton evaluation kit

USB Adaptor
pn# DS9490R

High-Speed 12Mbps Universal Serial Bus (USB) Interface with RJ11 female connector. Use with iButton connector (DS1402RP8) or Connexion Clamp (ER-1001)

Pricing  (CAD):
1 to 24:      $35
25 to 99:    $32
100 to 999:  $29
Over 1000:   $26

ibutton USB adaptor

Serial Adaptor
 pn# DS9097U-009

RS232 to 1-Wire® adapter for a RJ11 male connector. Use with iButton connector (DS1402RP8) or Connexion Clamp (ER-1001).

Pricing  (CAD):
1 to 24:      $35
25 to 99:    $32
100 to 999: $29
Over 1000:   $26

RS232 to 1-Wire® adapter ibutton

iButton Connector
 pn# DS1402RP8

Touch-and-Hold Probes that allow you to just touch an iButton or to snap it in place for hands-free operation.
RJ11 connector connects to USB or Serial adaptor.

Pricing  (CAD):
1 to 24:     $12
25 to 99:   $10
100 to 999: $9
Over 1000: $8

ibutton connector DS1402

Connexion Clamp
 pn# ER-1001

Heavy duty connector for iBCods and iButtons.
RJ11 connector connects to USB or Serial adaptor.

Pricing  (CAD):
1 to 24:      $60
25 to 99:    $58
100 to 999: $55
Over 1000: $52

Heavy duty connector for iBCods and iButtons

Key Fob
 pn# DS9093A

Yellow plastic snap-in fob.
The iButton is inserted by press-fitting the flange of the can into the cavity of the fob.

Pricing  (CAD):
1 to 24:     $1.97
25 to 99:   $1.69
100 to 999: $1.41
Over 1000: $1.12

key fob ibutton

Wall Mount
 pn# DS9093S

Glass filled Nylon for flush mounting on an object or wall with two mounting points. A protective wall is provided along the sides of the plate to reduce incidental damage to the iButton.

Pricing  (CAD):
1 to 24:    $1.69   
25 to 99:  $1.52
100 to 999: $1.29
Over 1000: $1.07

Wall mount ibutton

iButton Capsule
 pn# DS9107

Polyphenylene sulfide (PPS) plastic watertight container for the iButton. Can be used for the high temperature DS1922T in autoclaves applications.  See also our iBCod and iBees high temperature casing.

Pricing  (CAD):
1 to 24:    $45 
25 to 99:  $39
100 to 999:  $36
Over 1000:  $34

watertight capsule ibutton

iButton, Thermochron and Hydrochrons are registered trade marks of Maxim Dallas Semiconductors