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Tinytag Talk 2

Tinytag Talk 2 data loggers are compact devices that provide accurate temperature monitoring typically in vaccine or medical fridges, and cool storage areas to help the maintenance of the cold chain. These small measuring devices are also ideal for building condition monitoring, dry food storage and a variety of academic research applications. Temperatures from -40 to +125°C (-40 to +257ºF)
The range also includes voltage and current loggers that can be connected to a range of industry standard sensors for logging a variety of process parameters, including flow and pressure.
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TINYTAG DATA LOGGERS
Robust Environmental Monitoring Solutions.

Tinytag data loggers Accurately and Reliably Monitor and Record Temperature, Humidity, Power usage, CO₂ Voltage, Current and other environmental parameters. Tinytags include compact units for indoor use and rugged devices for industrial and outdoor applications.

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The Gemini Tinytag product lineup is listed below with brief descriptions, for further detailed information click on any of the images or links below.

Series Overview

Tinytag Talk 2 Data Loggers
Tinytag Talk 2 data loggers are compact devices that provide accurate temperature monitoring typically in vaccine or medical fridges, and cool storage areas to help the maintenance of the cold chain. These small measuring devices are also ideal for building condition monitoring, dry food storage and a variety of academic research applications. The range also includes voltage and current loggers that can be connected to a range of industry standard sensors for logging a variety of process parameters, including flow and pressure.
Please refine your search using the filter on the left of this page.
Tinytag Transit 2 Data Logger
The Tinytag Transit 2 is a lightweight data logger with a compact design, making it ideal for unobtrusive placement with consignments such as food, pharmaceuticals and other products in transit. It is BS EN 12830 compliant to meet the demands of the frozen and chilled foods storage and transportation industries. Like other Tinytag loggers, data is downloaded via a USB cable: however if many units require rapid downloading, an inductive pad is available to facilitate the process.
Tinytag Ultra 2 Data Loggers
Tinytag Ultra 2 data loggers are specially designed for indoor temperature and humidity monitoring. They are ideal for monitoring the efficiency of heating, ventilation and air conditioning in offices, workplaces and domestic properties. They are also widely used to help assess the performance of building materials such as insulation, and help evaluate ‘before and after’ conditions in environmental refit projects.
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Tinytag Plus 2 Data Loggers
Tinytag Plus 2 loggers are designed for measuring temperature and humidity in a variety of harsh, outdoor and industrial applications. Housed in robust, waterproof casings, they are deployed outdoors for monitoring environmental or climatic changes, growing conditions and wildlife habitats, and indoors for industrial areas or manufacturing processes. Versions are available with built in sensors and thermistor, PT100 and PT1000 probes.
Please refine your search using the filter on the left of this page.
Tinytag View 2 Data Loggers
For some applications it is necessary to have instant access to current readings as well as the ability to analyze recorded data over time. In these instances the Tinytag View 2 provides the solution with its integral digital display. Loggers in the range measure variables such as: temperature, relative humidity, current and voltage. Units suitable for thermistor, PT100, PT1000 and temp/RH probes are also available.
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Tinytag Plus Re-Ed Data Loggers
The Plus Re-Ed range records voltage, current and count inputs and can be connected to a variety of sensors to make specialist data loggers for a wide range of applications. Loggers in the range are used in this way to monitor for example, pressure, wind-speed and flow rate, as well as footfall in public buildings such as museums, exhibitions and galleries. Loggers are either supplied uncased (OEM) for building into custom applications, or as a standard data logger in a robust, waterproof case.
Please refine your search using the filter on the left of this page.
Tinytag Aquatic 2 Data Logger
The Aquatic 2 submersible data logger is specifically designed for under water applications. It is typically used for temperature monitoring in rivers, lakes and oceans, to monitor the effects of weather and climate change. The logger is also used for temperature recording in fish farms and in industrial water treatment applications.
Tinytag Splash 2 Data Logger
The Splash 2 is a waterproof data logger designed for high temperature applications where a fast response is needed. It is used for monitoring washer disinfectors, industrial dishwashers and other cleaning processes, typically in hospitals, catering establishments and industrial premises.
Tinytag Hand-held thermohygrometer
The Tinytag Hand-held is a portable device that can be used to take temperature and humidity spot readings, or left to record as a data logger to monitor conditions over time. It is suitable for use in many buildings including factories, workplaces, offices, retail premises and public buildings.
Tinytag CO2 Data Loggers
Tinytag CO2 loggers can play a key role in helping to verify that indoor heating, ventilation and air conditioning systems are performing correctly: areas with poor ventilation can lead to a build-up in carbon dioxide levels which can cause reduced concentration in occupants and in some cases can lead to health problems. Typically used in offices and workplaces, they can also help with adhering to BB101 recommendations concerning ventilation and CO2 concentrations in school buildings.

View All Tinytag Models

Tinytag Talk 2 Series

Tinytag TK-4014 | Support Library
| Data Sheet-TK-4014 |

Tinytag TK-4014 Med | Support Library
| Data Sheet-TK-4014 Med |

Tinytag TK-4023 | Support Library
| Data Sheet-TK-4023 |

Calibration Options

Calibration certificates can be purchased along with the logger at the point of sale. Tinytags already in use can also be returned for a service calibration at any time, for a standard charge.

Tinytag data loggers are guaranteed to meet the specification stated on their data sheets for a twelve month period from the point of purchase. If required, additional validation certificates traceable to national standards may be purchased when buying the loggers. These calibration certificates can be provided at the time of purchase. Tinytags already in use can also be returned for a service calibration at any time, for a standard charge.

Calibration Certificates

The calibration certificate provides verification that the data logger has been checked and has been found to be reading within the specification quoted on the unit's data sheet. Data loggers are compared to a reference meter that has been calibrated in a UKAS (United Kingdom Accreditation Service) approved laboratory. The certificate lists the value recorded by the reference meter (the point at which the data logger was tested), the value recorded by the data logger and the error between the two readings (the certificate will also show readings before and after any adjustment made to the unit where appropriate). In addition to the reading information, calibration certificates also list the test method and the details of the equipment used to provide traceability back to national standards.

Calibration certificates do not have a period of validity, they are simply a statement of what the unit was reading when it was tested.

Standard Calibration Points

For temperature and humidity loggers, our standard calibration points, which are used unless otherwise specified, are:

Temperature: 0 and 30°C
Humidity: 20 and 80 % RH (at 25°C)

These points have been chosen to give good coverage for general purpose use, but should other points be required we can calibrate units within the following ranges:

Temperature: -20 to +150 °C
Humidity: 20 to 90 % RH (at 25°C)

CO₂ loggers, our calibration points are:

0 to 2000ppm units: 250, 500 and 1750ppm
0 to 5000ppm units: 500, 2,500 and 4000ppm

We do not have standard calibration points for voltage and current loggers. Please contact us to discuss the calibration points you require.

Frequently Asked Questions About Tinytag Products

Calibration Options

Calibration Certificates

Standard Calibration Points

For temperature and humidity loggers, our standard calibration points, which are used unless otherwise specified, are:

Temperature: 0 and 30°C
Humidity: 20 and 80 % RH (at 25°C)

These points have been chosen to give good coverage for general purpose use, but should other points be required we can calibrate units within the following ranges:

Temperature: -20 to +150 °C
Humidity: 20 to 90 % RH (at 25°C)

CO2 loggers, our calibration points are:

0 to 2000ppm units: 250, 500 and 1750ppm
0 to 5000ppm units: 500, 2,500 and 4000ppm

Calibration Services Link

Software and Hardware Questions

Manually installing drivers for USB cables and pads (Tinytag Explorer Version 4.7 or above)

It is recommended that USB pads and cables are used with the current version of Tinytag Explorer (which will install and detect USB devices automatically).

The current version of Tinytag Explorer is version 4.11.

Free of charge upgrade to the current version of Tinytag Explorer.

If you cannot connect to your data logger after installing the latest version, go to Options and Communication Options and make sure the Use Fully Automatic Com Port Detection option has been selected.

If you still cannot connect to your data logger, it is likely that the USB drivers for your device have not installed correctly. To check whether the USB drivers for your device have installed correctly you should do the following:

- Plug in your USB cable or pad
- Go to your Device Manager

Windows XP Users: Start Button >> Control Panel >> System >> Hardware >> Device Manager

Windows Vista & Windows 7 Users: Start Button >> Control Panel >> Hardware and Sound >> Device Manager

If the cable has installed correctly, it should be listed under Ports (COM and LPT) as a USB Serial Port with a COM number in brackets after it. If this is the case and Tinytag Explorer is set to automatically detect loggers and still cannot connect, please contact your supplier or email help@tinytag.info for further assistance.

If the cable has not installed correctly it may be listed as a Gemini USB serial cable with a yellow exclamation mark next to it under Unknown or Other Devices.

- If this is the case, right click on the entry and select Update Driver (this will start a Hardware wizard running).

Windows XP Users:

- The first page of the wizard will ask you if Windows can search the internet or Windows Update for drivers, select the No, not this time option and click Next.

- Select the Install from a specific location option and point the wizard at the folder:

C:\Program Files\Tinytag\Tinytag Explorer\Drivers

And Next.

- Once the cable drivers have installed, click Finish.

Windows Vista & Windows 7 Users:

- Select the Browse my computer for driver software option and click Next.

- Point the installer at the folder:

C:\Program Files\Tinytag\Tinytag Explorer\Drivers

And click Next (you may be prompted to confirm your agreement to the installation).

- Once the cable drivers have installed, click Finish.

All Users

- If the device is still listed with a yellow exclamation mark against it, repeat the above process once again to set the device up as a COM port (the installation is a two-step process, first installing the drivers for the cable, and then setting up the cable as a COM port).

When you have gone through the installation for a second time the device should move to Ports (COM and LPT) and list as a USB Serial Port with a COM number in brackets after it.

Your cable or pad should now be ready to use, if you still cannot communicate with your data logger please email Contact Us.

Manually installing drivers for USB cables and pads (Tinytag Explorer version 4.6 and below)

It is recommended that USB pads and cables are used with the current version of Tinytag Explorer (which will install and detect USB devices automatically).

The current version of Tinytag Explorer is version 4.11.

Free of charge upgrade to the current version of Tinytag Explorer.

If you need to use a cable or pad with Tinytag Explorer version 4.6 or below, please follow the instructions below:

- Download up to date USB drivers from our web site here: USB Drivers (download button/link).

These drivers come in a zip file that needs to be unpacked before they can be installed.

- Unpack them to a folder you can find easily, and plug in your cable or pad.
- Go to your Device Manager

Windows XP Users: Start Button >> Control Panel >> System >> Hardware >> Device Manager

Windows Vista & Windows 7 Users: Start Button >> Control Panel >> Hardware and Sound >> Device Manager

- Your device should be listed as a Gemini USB serial cable with a yellow exclamation mark next to it under Unknown or Other Devices.

- Right click on the entry and select Update Driver (this will start a Hardware wizard running).

Windows XP Users:

- The first page of the wizard will ask you if Windows can search the internet or Windows Update for drivers, select the No, not this time option and click Next.

- Select the Install from a specific location option, point the wizard at the folder you unpacked above and click Next.

- Once the cable drivers have installed, click Finish.

Windows Vista & Windows 7 Users:

- Select the Browse my computer for driver software option and click Next.

- Point the installer at the folder you unpacked above and click Next (you may be prompted to confirm your agreement to the installation).

- Once the cable drivers have installed, click Finish.

All Users

When you have gone through the installation for a second time the device should move to Ports (COM and LPT) and list as a USB Serial Port with a COM number in brackets after it.

Close your Device Manager and open Tinytag Explorer.

Go to Options and Communication Options and select the COM port number the cable was listed with in the Device Manager.

Your cable or pad should now be ready to use, if you still cannot communicate with your data logger please contact us.

Exporting data from Tinytag Explorer

Recorded data can be exported from Tinytag Explorer for use in other applications either by saving it in a different file format or by using copy and paste.

Data displayed in any of the tabular views - Table of Readings, Information and Daily Min/Max - can be exported as a whole or in part (the tabular views behave in a similar way to a spreadsheet allowing you to select the data you wish to export).

Using copy and paste, data can be exported directly from these views into third-party applications. Additionally, data can be exported in different file formats by going to File and Export (the different types of save format include .xls, .xml, .txt, and .csv). The graph view can also be exported as an image for use in reports and publications.

Further information on how to export data from Tinytag Explorer is available in the Exporting Data section of the Tinytag Explorer Help file.

Handling times and dates in Tinytag Explorer

Information about time and date settings.

Time and date

The time and date in a data logger is set at the start of every logging run and is taken from the clock of the PC the unit is started on. If the time or date of the PC clock is set incorrectly then the recorded data will be displayed with the wrong time or date so it is important to ensure that the time and date on the PC is always set correctly.

Clock accuracy

The clock accuracy for Tinytag Talk 2, Ultra 2, Plus 2, View 2 and CO2 data loggers at 25°C is ~20ppm (which equates to a maximum drift of ±1.73s/day).

At other temperatures the clock accuracy is as follows:
-10 to +60 deg C: ±50ppm (±4.32s/day)
-30 to +80 deg C: ±130ppm (±11.232s/day)

Time zone

Tinytags are not aware of the time zone where they were launched. So, for example, data from a logger launched at 18:00 in London will show a start time of 18:00 when viewed in New York.

Daylight saving changes

The times displayed by Tinytag Explorer are calculated when the data is displayed and depend on the daylight saving settings of the PC at that time. For example, if a .ttd file is opened before and after DST settings change, then all times displayed by Tinytag Explorer will go forward or back.

The advantage of this approach is that the relative time information is always correct. For example if a logger is set to record once every 24 hours and is left running during a DST transition all the timestamps will be 24 hours apart.

Unfortunately this approach means historic data may appear wrong if DST has changed since the data was recorded. For example a ttd file from a logger that records every 18:00 GMT in the winter will display 18:00 when viewed in the winter but 17:00 when viewed during the summer.

Note: describing how the data is displayed by Tinytag Explorer on PC's in countries that apply different DST rules to those where the logger was launched is beyond the scope of this article. Contact Contact Us. if you require an explanation of this.

Questions About Temperature and Humidity Sensors

Replacement probes for temperature and relative humidity data loggers

This article applies to TGP-4505, TV-4505 and TV-4506 data loggers only.

TGP-4505, TV-4505 and TV-4506 data loggers are supplied with probes that are individually calibrated to the logger they are paired with.

If a replacement probe is required, the logger must be returned to Gemini for calibration with the replacement probe.

There is a standard charge per logger for this service. To return a data logger for a new probe, please follow the instructions here: Returning Data Loggers for Repair.

If you should have any questions, please call us or e-mail

Using third party PT100 probes with Tinytag loggers

Information about how to connect third party PT100 probes to our loggers.

We supply a range of PT100 probes for use with our loggers, but you can use your own third party probes if required.

The ACS-9703 datasheet (see Connection Information 2) provides wiring instructions for 2, 3 and 4-wire PT100 sensors.

We recommend the use of 3-wire, class A sensors.

2-wire and 4-wire sensors can be used, but the accuracy is reduced when 2-wire sensors are used and loggers will not read the fourth wire of 4-wire sensors.

The ACS-9703 5-pin Tajimi plug should be used with the following products:

Tinytag Plus 2: TGP-4104

Tinytag View 2: TV-4104

Using third party PT1000 probes with Tinytag loggers

Information about how to connect third party PT100 probes to our loggers.

We supply a range of PT100 probes for use with our loggers, but you can use your own third party probes if required.

The ACS-9703 datasheet (see Connection Information 2) provides wiring instructions for 2, 3 and 4-wire PT100 sensors.

We recommend the use of 3-wire, class A sensors.

2-wire and 4-wire sensors can be used, but the accuracy is reduced when 2-wire sensors are used and loggers will not read the fourth wire of 4-wire sensors.

The ACS-9703 5-pin Tajimi plug should be used with the following products:

Tinytag Plus 2: TGP-4204

Tinytag View 2: TV-4204

Getting unexpected readings on a humidity logger

What to do if your humidity logger shows unusual readings.

If your humidity logger is showing unusual or unexpected readings, it is likely that the sensor has come into contact with a liquid, which effectively shorts it out. Where the sensor becomes saturated, it is possible for the readings to show 100 or 0% or just above. This file below shows a typical reading if this happens.

Wet Sensor Reading

Once the sensor has been able to dry out, and provided no residue is left on it, the unit should read correctly once more.

Current Tinytag Plus and View relative humidity data loggers now use a coated RH sensor which offers increased protection against moisture.

When these sensors come into contact with moisture their readings are more stable and they also recover faster when they dry out.

Using third party input leads with Tinytag loggers

Information about using third party input leads.

Voltage, current and count input data loggers are supplied with input cables to connect them to third-party sensors. Connection information for these loggers can be found on their product data sheets.

Longer length input cables can be supplied on request, please contact us for further information.

If your sensor already has a cable, a plug can be supplied to connect it to your data logger. Details of the plugs we supply can be found here: Spare Connectors.

Connection information for plug connections to different loggers can be found on their product data sheets.

Battery Related Questions

Data logger battery life

Advice on expected battery life.

With typical use, most data loggers will have a battery life of at least two to three years.

For most recent data logger models - Talk 2, Ultra 2, Plus 2, View 2, Aquatic 2 and Splash 2 - Tinytag Explorer software will warn a user when the battery in their unit is getting flat.

When data loggers are started in Tinytag Explorer the software checks the unit's battery status and advises if it needs replacing. If the battery is very low, the software will prevent the user starting the unit so that data is not lost.

The battery status of a data logger can be checked at any time by performing a current reading in Tinytag Explorer.

(There is no low battery warning on a data logger itself, the red LED most units are fitted with is part of the logger's alarm feature.)

Checking battery status

It is easy to ensure recording is not interrupted, by checking the logger's battery status.

To ensure continuity of recording, most recent data logger models - Talk 2, Ultra 2, Plus 2, View 2, Aquatic 2 and Splash 2 - have a feature in the Tinytag Explorer software to warn when the battery in the unit is getting flat.

When data loggers are started in Tinytag Explorer, the software checks the unit's battery status and advises if it needs replacing. If the battery is very low, the software will prevent the user starting the unit so that data is not lost.

Remember, you can check the battery status of a data logger at any time simply by performing a current reading in Tinytag Explorer.

With typical use, all data loggers will have a battery life of at least one year. Many logger batteries will last two to three years.

(There is no low battery warning on a data logger itself, the red LED most units are fitted with is part of the logger's alarm feature.)

Transporting data loggers with lithium batteries

Most of Gemini’s Data Loggers are powered by lithium batteries (‘lithium metal cells’) which have regulations restricting their transportation by road, sea or air due to the hazardous nature of lithium.

Many Tinytag data loggers are powered by lithium batteries ('lithium metal cells') which are subject to regulations restricting their transportation.

Lithium Mark

Provided there are no more than four data loggers contained per package (each logger containing one lithium metal cell) then the package may be transported freely anywhere in the world by ground or air. Please note however:

This only applies to data loggers with batteries fitted (not spare batteries or service kits)
The data loggers and the batteries in them must be free from damage.
All batteries inside the data loggers must meet the requirements in the UN Manual of Tests and Criteria, Part III, Subsection 38.3 and must contain less than 1g of lithium.

All batteries supplied by Gemini Data Loggers meet these requirements. Customers are responsible for checking the compliance of any batteries not supplied by Gemini Data Loggers.

Please note that many replacement lithium 'c' cells (the battery used by some Tinytag Radio loggers) contain more than 1g of lithium. For this reason when returning any lithium battery powered Radio loggers to us they must be sent without their batteries.

Shipments containing more than four loggers

When transporting more than four loggers (each containing one lithium metal cell) by ground or air the following additional shipping instructions must be adhered to*.

Pack loggers in strong, rigid outer packaging to protect them from damage (e.g. a ridged cardboard box).
Attach a Lithium Mark to the package. Please note, this label must be printed in black and red as shown in the link. The minimum size is 120 x 110mm, and the telephone number of someone knowledgeable about the shipment must be added.

* Shipping instructions given here are general guidelines. Some carriers may have additional requirements (e.g. declaring the hazard on the Consignment Note as partially regulated lithium metal batteries in equipment UN3091/P.I. 970 Section II). Customers are responsible for checking their local regulations and any carrier specific requirements. Micron Meters no longer provides or ships replacement batteries for the Gemini Tinytag Data Loggers. Batteries can be sourced at Battery Center, Battery Part Numbers are listed on the Logger Data Sheets.

Question about Flashing Lights

What does the red flashing LED on the logger mean?

Most data loggers are fitted with a red flashing LED.

The red flashing LED is part of the logger's alarm feature. If it starts to flash, this means that environmental conditions have fallen outside the range that has been chosen during set up in the Tinytag Explorer software.

The red LED is not a warning of a low battery: most recent data logger models - Talk 2, Ultra 2, Plus 2, View 2, Aquatic 2 and Splash 2 - have a feature in the Tinytag Explorer software to warn when the battery in the unit is getting flat.

What does the red flashing LED on the CO2 logger mean?

Most data loggers are fitted with a red flashing LED.

The red flashing LED is part of the logger's alarm feature. If it starts to flash, this means that the upper ppm level that has been chosen during set up in the Tinytag Explorer software has been reached. The flashing LED also indicates if the mains power supply has been interrupted.

The red LED is not a warning of a low battery.

Miscellaneous Questions

Using Tinytag loggers in a vacuum

Recommendations for using loggers in a vacuum.

We recommend units from our Tinytag Ultra 2 range for use in low pressure applications.

This advice only applies to Tinytag Ultra 2 loggers fitted with the supplied SB-AA02 battery (if required you can purchase a service kit which includes them).

The SB-AA02 battery has been tested at 11.6K Pa (116 mBar/1.68 PSI) for a period of six hours at 20°C, in accordance with UN regulations on the transportation of lithium batteries.

Getting a blank display on the Hand-held Thermohygrometer

What to do if the display on your Hand-held Thermohygrometer is blank.

The Hand-held Thermohygrometer needs to be turned on in order for the display to show. If the display is blank after turning it on, you need to check the battery.

However, you will get advance warning when the unit's batteries are getting low as a low battery indicator will light on the display. There is also a feature in the Tinytag Explorer software to warn when the battery in the unit is getting flat.

When the Hand-held Thermohygrometer is started in Tinytag Explorer, the software checks the unit's battery status and advises if it needs replacing. If the battery is very low, the software will prevent the user starting the unit so that data is not lost.

Remember, you can check the battery status at any time simply by performing a current reading in Tinytag Explorer.

With typical use, all data loggers will have a battery life of at least one year. Many logger batteries will last two to three years.

The unit takes 2 x 1.5V AA alkaline batteries (user-replaceable). Before replacing the batteries the data logger must be stopped. Data stored on the logger will be retained after the batteries are replaced.

Replacing the Hand-held batteries

The Hand-held batteries are user-replaceable.

The TH-2500 Hand-held uses 2 x 1.5V AA alkaline batteries. Before replacing the batteries the data logger must be stopped. Data stored on the logger will be retained after the batteries are replaced

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