Custom Thermometers

Irreversible Strips

Irreversible Strips

We can produce custom irreversible strips for quantities of at least 5000 units. We work with a range of 49 temperatures, from 29ºC to 290ºC which can be combined as desired (see Available standard temperatures) The strip can be of desired shape and size, as it can have a desired background colour.

Reversible or liquid crystal strips

This product works with a wide range of temperatures, from -30ºC to +90ºC. Any desired temperatures can be combined and the thermometer's scale can be from 1ºC to 20ºC.

As well as in irreversible strips the minimum custom supply must be of 5000 units.

To provide exact prices we need the following information:

  • Temperature range.
  • Nº. of events (ammount of Temperature points for detection)
  • Scale: from 1 to 20 degrees.
  • Scale type: usually ºC, but can also work ºF, or even both.
  • Size of strip (in mm)
  • Shape of strip
  • Messages or logos to be printed on the strip, visualisation:
    1. Messages can always be read (ink is not thermally sensitive).
    2. Messages can be part of the thermal event.
  • Material (if the thermometer must be integrated to something which is not auto-adhesive paper)

Supply: (nº of weeks after the "artwork" is approved by our customer. usually not less than 6 weeks.)

LCD Thermometers - promotional products

SURISA offers a wide range of products which experience a change in colour when temperature varies. These products can be classified in three main types of product:


Thermosensitive reversible strips

These indicators show the current temperature in colour. They are made up of liquid crystal which calibrated on different temperatures and printed over auto-adhesive paper act as a normal thermometer. Temperature is shown with a intense green colour over the black background. Our thermometers are different form the "usual thermometer" because as they are printed on paper they have a high flexibility which makes them perfect for usage over curved surfaces. The technology used is based on the BS EN ISO 9001 quality standard. We frequently name these thermometers reversible strips to not confuse them with the irreversible strips.


TLC 13 Level
Size: 15 x 132mm
Type: Horizontal Auto-Adhesive
Scale: ºC y ºF
Increments: 1 ºC

TLC 13 Level

Thermometer's models and its ranges

  1. 0 1 2 3 4 5 6 7 8 9 10 11 12ºC
  2. 12 13 14 15 16 17 18 19 20 21 22 23 24ºC
  3. 24 25 26 27 28 29 30 31 32 33 34 35 36ºC
  4. 36 37 38 39 40 41 42 43 44 45 46 47 48ºC
  5. 48 49 50 51 52 53 54 55 56 57 58 59 60ºC


TLC 7 Lvel Horizontal
Size: 12.5 x 45mm
Type: Horizontal Auto-Adhesive
Scale: ºC and ºF
Increments: 5 ºC

TLC 7 Lvel Horizontal

Thermometer's models and its ranges


2. 0 5 10 15 20 25 30ºC

3. 30 35 40 45 50 55 60ºC

4. 60 65 70 75 80 85 90ºC



TLC ROOM - Best for calendars.
Size: 132 x 19mm
Type: Vertical plastic housing Auto-Adhesive
Scale: ºC and ºF

Thermometer's models and its ranges


  1. 14 16 17 18 19 20 21 22 23 24 26 28 30 32 34ºC

TLC Freezer - best for fridge and freezer.
Size: 132 x 19mm
Type: Vertical plastic housing Auto-Adhesive
Scale: ºC
Increments: 3 ºC

Thermometer's models and its ranges


  1. -1 -4 -7 -10 -12 -15 -18 -21ºC


TLC 16 Level

TLC 16 Level - Best for calendars.
Size: 127 x 12.5mm
Type: Vertical Auto-Adhesive
Scale: ºC and ºF
Increments: 2 ºF

Thermometer's models and its ranges


2. 14 16 17 18 19 20 21 22 23 24 26 27 28 29 30 31ºC

3. 32 33 34 35 37 38 39 40 41 42 43 44 45 47 48 49ºC


TLC 8 Level

TLC 8 Level
Size: 63.5 x 12.5mm
Type: Vertical Auto-Adhesive
Scale: ºC and ºF
Increments: 2 ºF

Thermometer's models and its ranges


5. 32 33 34 35 37 38 39 40ºC



TEMPSAFE, security device. Visit our link to get more information.

Liquid crystal suffers a secuential colour change brown / green / blue, as temperature varies, where green indicates real temperature. With a +/- 1ºC accuracy (0,5 in medical usage thermometers).

Variables such as colour intensity, durability/stability, sensitivity and response time can be controlled to produce different types of meters depending on the requirements. Aswell as shapes: Round, squared, rectangular... Products can also have non uniform shapes(such as flowers, animals etc..)

Our 20 year experience dealing with liquid crystal allows us to offer our customers not only a wide range of default thermometers, but also a range of possibilities to create Custom Thermometers.

- Available range of temperatures using liquid crystal: from -30ºC to +90ºC (*)
- Increments using liquid crystal: 1ºC to 10ºC

  • (*) Our research department is working on reaching temperatures up to 120ºC without losing on product durability. At the moment we have reached such temperatures but the product has a shorter life span. We currently offer some products which reach that temperature

Thermosensitive inks

Thermosensitive Inks are used to create many types of product due to their behaviour. Mostly applied uses for these are promotional products and their usage in security devices: Money paper, lotterys...

  • TEMPSAFE: Security device based on this technology which prevents burning.

- Temperature range applied to inks: from -10ºC to +70ºC

Promotional products

Promotional products

With our Promotional Products we expand our well known range of liquid crystal thermometers. This new products produced with thermosensitive and photosensitive inks, have as a main feature several colour changes depending on temperature or sunlight (UV).

Thermosensitive spoon for cold and hot drinks


Irreversible Thermometers

Irreversible Strips are thermometers which allow to record temperatures in an unasisted way. This indicators have several regions which change colourpermanently when a certain temperature is reached.Irreversible Strips 

Our thermometers are user friendly products, and give an extremely precise temperature reading because they actually read from the surface which has to be checked. In this way we record the required temperature and not the temperature surrounding the product. Being irreversible makes them remain a certain colour when a temperature is reached, which allows the user to see what temperature was reached once the process has finished even if the temperature has changed.
Being strips allows the user to attach them to a report as quality control devices.

Produced based on quality standards BS EN ISO 9001


Types of thermometer

We have a complete range of thermometers varying in shapes and sizes. They can have from 1 to 10 spots of different temperatures per thermometer. Each design has several temperature ranges.



They cover from 29 ºC to 290 ºC, although we also have Low temperature thermometers which cover from -17 ºC to 20 ºC. Other products such as our crayons can measure temperatures up to 600 ºC.

Strips are water, oil, and vapour proof. Their are +/- 1 ºC precise up to 100 ºC and +/- 1 % precise onwards.

Standard Available Temperatures:
29 ºC 33 ºC 34 ºC 37 ºC 40 ºC 42 ºC 43 ºC
44 ºC 46 ºC 49 ºC 54 ºC 60 ºC 62 ºC 65 ºC
71 ºC 77 ºC 82 ºC 88 ºC 93 ºC 99 ºC 104 ºC
110 ºC 116 ºC 121 ºC 127 ºC 132 ºC 138 ºC 143 ºC
149 ºC 154 ºC 160 ºC 166 ºC 171 ºC 177 ºC 182 ºC
188 ºC 193 ºC 199 ºC 204 ºC 210 ºC 216 ºC 224 ºC
232 ºC 241 ºC 249 ºC 254 ºC 260 ºC 280 ºC 290 ºC

Las temperaturas de las etiquetas irreversibles, a diferencia de lo que sucede con los termómetros de cristal líquido, son fijas. Se pueden fabricar sensores "a medida", a partir de una cantidad determinada, pero, eso sí, conteniendo temperaturas de las arriba relacionadas.

Irreversible thermometers catalogue

Special strips

 Low temperature

Chillchecker Self-adhesive device, very easy to stick on any packing/surface, due to its small size. Economic and precise, they are suitable to control critical temperatures during the transport and/or product storage. 

Tempasure: Sensor that detects the temperature drop to avoid the freezing of materials. Being a sophisticated indicator which uses its own patented and exclusive mechanism, it continues being a self-adhesive device of easy use.


Micro temperature indicators: The smallest in our catalogue, ideal for using on diverse electronic components with minimum surface availability.

LIndustrial dishwashers. Sterilization & disinfectant

TDI: It guarantees, by means of a permanent colour change that the washing process has reached the correct temperature. Accepted for its use in accordance to the actual norms of Hygine and Security for which it is recommended as a valid register to include in the HACCP instructions.


Temperature monitoring in the textile industry: Initially designed to control the temperature during the process of fabric fusion its use has been extended to other applications in the textile world. It prevents overheating that would cause fragile fabric appearances, due to insufficient heating during the process of fusion, which would cause a later fragile fabric union/fusion.

Thermometers and temperature indicators

The self-adhesive thermometers Thermax allow an effective and precise control of the temperature, as they are directly applied on the product to control. They act like sensors detecting the real temperature of the product by means of a change of colour.

The fact of being of easy use and low cost, turns them a perfect solution for the control of quality in thermal processes. Our technology is used at a world-wide level by a number of companies in different professional fields.

The technology of our products is based on the colour change in function of the variation of temperature and covers a range with solutions from -30 ºC to 1,270 ºC. We have two types of thermometers / indicators:

Irreversible Thermometers:  Once arrived at the temperature and the colour changes, this remains unalterable, allowing us to verify the maximum temperature reached upon. This is highly used for uncontrolled processes. For certain temperatures (low), we have a device to control minimum temperatures. Check our indicator in our link Tempasure.

Reversible thermometers: Also known as liquid crystal thermometers (LCD). This indicates the temperature of the product to control, and varies along with it. It indicates the temperature of the product in an intense green colour with a black background. Very useful for knowing the room temperature ( ex. Office, rooms ), and even freezing temperatures such as freezers or fridges, or extremely hot temperatures such as conduction tubes or heating generators. The colour change is based on the surroundings, so as to say they behave as a normal temperature indicator.

Due to the attraction and originality, this type of indicator can be used as an attraction in advertising campaigns. If you need more information on this utility, please visit our section based on Promotional Products where, in addition to diverse models of temperature indicators, you can see other articles which change of colour according to temperature differences.

Other than our offer on standard temperature ranges, our experience with LCD allows us to manufacture different products to solve each clients' necessities (minimum quantity 5.000 units). For a larger catalogue please visit Custom Thermometers.

Surisa completes the range of products with thermo sensible pencils and thermo chromic inks. Press here to follow the links for further information.

Irreversible Thermometers LCD Thermometers. Promotional products Promotional Products Crayons   Thermal paints   Inks
Irreversible Thermometers LCD Thermometers. Promotional products Promotional Products Crayons