Thermochron, Hygrochron,
very small loggers, button loggers
temperature, humidity
logger without wires - Thermocron, Hygrocron

ThermocronThermochrons are very low cost temperature data logger made of stainless steel.
Hygrochrons are the same but also measure humidity.

Their small size and sturdy construction make them ideal for wet and rough conditions - data loggers without wires.
Their low price make them ideal for tracking everything from fridges to individual shipments.

On this page:  

Prices do not include GST and may change without notice.

Thermochron - button size data loggers - Thermocron

Very low cost temperature (Thermochron), or temperature, & humidity (Hygrochron) loggersThermocron actual size

Thermochrons are incredibly small, robust temperature loggers. Features include:
- Long battery life (up to 10 years depending on usage pattern)
- Stainless steel housing making them incredibly tough
- Support temperatures from -40° to 140° (model specific)

Their small size and sturdy construction make them ideal for wet and rough conditions.
Their low price make them ideal for tracking everything from individual fridges to individual shipments.

Attach to almost anything
The 17mm iButtons (about the size of 5 stacked coins) attach unobtrusively to almost any container surface or wall - on bottles, totes, boxes, crates, pallets, air cargo containers, refrigerators, semi trailers, railroad freight cars, etc.
The stainless steel armor withstands dirt, moisture and rough treatment.

For adverse environments, they can be housed in the iButton Capsule (see below).

The basic Thermocron (TC) measures temperature in 0.5°C increments, while the super models (TCS, TCX, TCU, HC) support increments of 0.063°C.

Accuracy (TC model):     ±1°C from -30°C to +70°C,    ±1.3C beyond this range
Resolution (TC model):   0.5°C

Built-in real-time clock (RTC) and timer has accuracy of ±2 minutes per month from 0°C to 45°C
Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes
Delay Start Up to 45 days

Thermochron Chart

Note that the temperature ranges shown are as specified by the manufacturer, however if you need to measure temperatures below -30 degrees C we would recommend a different logger, please contact us for details.

There are several iButtons from which to choose.
The TC, TCH, and TCZ are standard Thermochrons.
The TCS, TCX, and TCU are high-capacity Thermochrons with more logging memory, increased accuracy, and increased resolution.

The standard Thermochron (TC, TCH, TCZ) allows 2048 readings with time intervals of 1 to 255 minutes.
The high-capacity Thermochrons/Hygrochrons allow 8192 readings with time intervals from 1 second to 273 hours.

Logs thousands of consecutive temperature measurements in protected nonvolatile (NV) random access memory
Records a long-term Temperature Histogram with 2.0°C resolution (63 bins)
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

Common Thermochron & Hygrochron features:    (Hygrocrons measure humidity also, see Hygrocron below)
Digital identification and information by momentary contact by the reader
Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures ab-solute traceability because no two parts are alike
Multidrop controller for 1-Wire net
Chip-based data carrier compactly stores information
Data can be accessed while affixed to object
Button shape is self-aligning with cup-shaped probes
Durable stainless-steel case engraved with registration number withstands harsh environments
Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim
Presence detector acknowledges when reader first applies voltage
Meets UL#913 (4th Edit.).
Information from real time readings can be used to control processes (see FAQ link below)

Additionally, the Hygrochron allows simultaneous temperature and humidity logging and offers selectable resolution settings.

The Thermochron and Hygrochron iButton data loggers are ideal for a diverse range of applications. Because of their stainless steel casing, these devices are especially useful in harsh environments. Care must be taken, however, not to subject the units to environmental forces that exceed their specified level of protection. Thermochron and Hygrochron iButtons are certified to IP56 (dust and strong water jets), but should not be submerged.       
For a submerged application a waterproof enclosure such as the iButton Capsule must be used.

Thermochron dimension diagram (opens in new tab)

To get started, you need: 
  • One eTemperature Kit which includes the reader, software and case (see below), and
  • Choice of Thermocron (generic, fridge, or room/body temperature)
  • Optionally: fobs to assist in the handling of the Thermocrons (see below).     nmr  zkez-

      FAQ on Thermochron Loggers (opens new tab or window)  

Thermocron actual sizeTC   Generic logger, to 85°C  (DS1921G)

-40° to 85°C, Res 0.5°C, 2000 readings storage:              $60+GST     4/14
      Substantial quantity discounts are available for Thermochron loggers - please enquire.
          Thermochron TC1  (DS1921G) Data Sheet (pdf file, opens in new tab or window)

TCZ  Fridge logger,  -5°C to 25°C  (DS1921Z)

-5°C to 26°C,  Res 0.125°C, 2000 readings storage:         $45+GST    8/14
     Substantial quantity discounts are available for Thermochron loggers - please enquire.

Also required with Thermochron:  eTemperature Kit  (PC Software and USB Reader) ... see below under Accessories

Thermochrons, with larger memory, higher resolution

    8,000 temperature readings with 0.5°C resolution,         or
    4,000 temperature readings with 0.0625°C resolution.

TCS  Super model, to 85°C  (DS1922L)

-40°C to 85°C,     8000/4000 readings. Resolution: 0.5°C/0.0625°C:          $90+GST
      Substantial quantity discounts are available for Thermochron loggers - please enquire.


Monitor temperature inside a sterilising unit, incubator, dish washer and other hot environments, with TCX.

TCX  Extreme model, to 125°C  (DS1922T)

0°C to 125°C,   8000/4000 readings, Resolution 0.5°C/0.0625°C:           $150+GST    10/16
     Substantial quantity discounts are available for Thermochron loggers - please enquire.

TCU  Ultra model, to 140°C  (DS1922E)

+15°C to 140°C,   8000/4000 readings, Res 0.5°C/0.0625°C:                  $199+GST
      Substantial quantity discounts are available for Thermochron loggers - please enquire.
      Note: Accuracy between +110°C to +140°C is ±1.5°C. For the remaining range it is ±7°C.  
      Data sheet on DS1922E (pdf file, opens new tab or window)

    FAQ on Thermocron Loggers (opens new tab or window)  

Also required with Thermochron:  eTemperature Kit  (PC Software and USB Reader) ... see below under Accessories

Thermocron actual sizeHygrochron     (aka Hygrocron)
Humidity and Temperature logger

HC   Humidity & Temperature model  (DS1923L)

0 to 100%RH,  -20°C to 85°C,   Res 0.5°C / 0.0625°C,  4000 / 2000 readings:            $165+GST
     Substantial quantity discounts are available for Hygrochron loggers - please enquire.

Either 4,000 time/temperature/humidity recordings at low resolution
      or 2,000 readings at high resolution.
Digital Hygrometer Measures Humidity with 8-Bit (0.6%RH) or 12-Bit (0.04%RH) Resolution
Operating Range: -20°C to +85°C; 0 to 100%RH (see Safe Operating Range Graph in the full data sheet)

Temperature Accuracy: ±0.5°C  with software correction
Humidity Accuracy:        ±5% RH with software correction

The tiny opening in the lid of the Hygrochron employs a special filter that allows water vapor to pass through and reach the internal humidity sensor, but repels liquid-phase water.

For applications where both temperature and humidity are important (foods, chemicals, powders, HVAC systems), the Hygrochrons deliver unprecedented performance in an unbelievably compact size.

      Common features of Thermochrons & Hygrochrons (jumps to higher up this page)

      Data sheet on Hygrochron (pdf file, opens in new tab or window)      Data sheet on DS1923 (pdf file, opens new tab or window)

      Dimensioned diagram of Hygrochron (opens new tab or window)

Also required with Hygrochron:  eTemperature Kit  (PC Software and USB Reader) ... see below under Accessories

Also available
• Fobs (holder for the logger)
under Accessories below

      FAQ on Thermochron Loggers (opens new tab or window)   


Software & Readers

The Thermocron & Hygrochron require the  eTemperature Kit,  which includes software and reader.

eTemperature Kit

eTemp:   eTemperature & Reader Kit, eTemperature software (see below), & Reader with USB i/f:     $155+GST

ReaderThe software can be loaded on unlimited machines. 

Update from web: free.    Optional update CD:  UPD-CD eTemperature CD:  $25

eTemperature is an Australian owned and developed software package.

For pricing of more than 5 units, please contact us.

eTemperature Software Download


eTemperature Software description

eTemperature software is designed in Australia, and is very well supported.

Supports the following devices:
        Thermocrons: TC, TCZ, TCH, TCS, TCX,   Texmate    Hygrochron: HC

eTemp SoftwareIt provides the ability to:
   Set up units
   Download results
   Graph results with pan and zoom capabilities
   Save results for later recall
   Export results to other programs
   Email results
   Quickly program units with preset options

Recent new features include:
   Automatic emailing of results
   Online loggers with automatic downloading, saving and emailing
   Automatic unlock code detection when online
   PDF results
   Support for humidity loggers

Version 7.14 New features include:
   Support for 64-bit windows (see new drivers below)
   Daily Min/Max report
   Option for exceptions in min/max report
   Calculation of IceDays
   Advanced data analysis capabilities

NOTE: You must install either the 32-bit or 64-bit drivers as well as eTemperature.


Licences give unlock codes and the installation guide.
Unlock codes are reader specific.

Customer must return a broken Reader before a replacement will be provided. An unlock code will then be provided.

Fobs for Thermocrons:

Fobs are small plastic tags used to identify the Thermocron and make them easier to handle.


Fob colours available :
black,   blue,   green,   yellow

FOB2   $3+GST  please specify colour

These prices apply when ordered with logger.


Card Fob

Card Fob: A FOB the size of a credit card.

Card FobThe Thermocron can be inserted into one section and an identifying card inserted.

Available in
  Black, Red, Yellow, Green,
  Blue or Clear.

These prices apply when ordered with logger.


Clear Fob

Clear FobCLRFOB   
      Clear fob with numbered insert:  $4+GST

      Clear fob with customised insert: $4+GST
Artwork fee applies.
Contact Esis for further details.

  Artwork for customised insert: $80+GST


NATA certificate

N-CERT-T       3 point NATA certificate, Temperature only              $120+GST
N-CERT-TH   3 point NATA certificate, Temperature and humidity    $350
N-CERT-HF   Handling fee (per order)   $15

iButton Capsule mechanical enclosure - moisture, solvents and pressure

TCCAPThe iButton® Capsule is a mechanical enclosure to protect Thermochron loggers from moisture, solvents and pressure.
The device consists of a base with the cavity for a Thermochron, a screw-in plug with O-ring to seal the enclosure, and a top with two stainless-steel screws to mount the iButton Capsule to a cable, e.g., to measure temperature at different levels within a liquid.
The cable is inserted into the notch of the plug where it is held in place by the matching protrusion of the top piece.
     Data sheet on iButton Capsule (.pdf file, opens new tab or window)

Diameter: 25.4mm,     Total height: 28mm  (base: 16.5mm + plug: 6.35mm + top: 5.1mm )  
Weight Empty: 18.4 grams

Note that the logger cannot be connected to a PC whilst in the capsule – it must be removed from the capsule for setup and downloading data.

Applications: Autoclave Sterilization, Seawater temperature profiling
                   Monitoring of beverage production, Scientific research

TCCAP: A screw capped capsule to make the Thermocron totally waterproof.
It will protect the Thermocron from moisture, solvent and pressure.
Can be used with the TC; TCZ; TCS; TCX and TCU.

TCCAP    iButton® Capsule:              for small quantities   $80+GST

Dallas iButton part numbers

Servesafe Training CD

Servesafe is an interactive training CD for correct food handling.
It teaches users how to minimise the risk of food poisoning incorporating HACCP principles of food handling.

Course content includes:
• Food poisoning
• Maintaining personal hygiene
• Receiving and storing food
• Preparing and serving food
• Keeping a workplace clean
• Assessment

Please note: This product was updated in March 2009 with the 2007 Supplement to the 2005 FDA Food Code,
and reflects minor changes.

SRVSAFE: Servesafe Training CD:  $150+GST

Site license for servesafe: Site licenses and franchise licenses are available upon request.

ServSafe® Complete Food Safety DVD

Topics covered include:
• Introduction to Food Safety
• Overview of Foodborne Microorganisms and Allergens
• Personal Hygiene
• Purchasing, Receiving, and Storage
• Preparation, Cooking, and Serving
• Facilities, Cleaning and Sanitizing, and Pest Management

• Real-world scenarios bring students inside an operation without the need for actual equipment
• An engaging mix of visual and audio learning appeals to all learning styles
• Developed by industry experts to deliver practical, relevant information
• Designed to deliver a consistent message on very complex tasks
• Helps instructors decrease lecture time and add interest to classes
English Running Time - 2h 07m 45s

Wireless temperature logger, low cost

Wireless temperature logger, low cost - expected to be available for sale in February 2013 - please enquire  nmr
2,000 or 500,000 readings, 1 minute to what ever sample rate,
Red and green LEDs,
Push button start 1and logging,
Up to 50m communication distance.    
2.5cm x 2.5cm x 1cm.
Battery life of about 2 years. Batteries probably won’t be replaceable but we were looking at rechargeable batteries.

To see our full range of data loggers, please jump to Data Logger main page


Another small logger - credit card size:

LogTag is claimed to provide the most cost effective, high performance temperature data logging system available for today's market.    nmr

The Logtag temperature logger is about the size of a credit card and offers:

• 8,000 readings
• 0.1°C resolution
• 0.5°C accuracy between -10°C and 40°C
• 1 minute to many hours sampling rate
• Push button start
• Push button event recorder for staff
LED alarm indicator
• Size of a credit card

   For more details, jump to the LogTag page  

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Contact us for more info:

Phone: +61 2 9481 7420

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