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Ultra low temperature data logger from -80°C up to 140°C with probe of various lengths. It is particularly indicated for monitoring and validation of ultra freezers.

S-MicroW XL Ultra Freeze is an ultra low temperature data logger from -80°C to 140°C (calibration from -40°C to 140°C) with 20, 100 mm or on demand length external probe (probes cannot be switched) on a 5 mm base (base height is not counted for probe length), managed with Windows software and USB interface (DiskInterface HS, Multibay). Battery is user replaceable and the data logger is provided with an Accredia (NIST equivalent) traceable cetificate on 6 points.
The data logger looks like the S-MicroW XL standard but it includes a calibration from -40°C. With calibration from -40°C it can be used also at -80°C with an accuracy within ± 0,5 °C within range -80 °C ÷ -40 °C. If -80°C is requested to be on the certificate, an extra calibration point for very low temperatures must be purchased. It is particularly indicated for monitoring and validation of ultra freezers.

The other versions of the data logger are:

  • S-MicroW L: with rigid probe of different lengths
  • S-MicroW XL Flexible: with flexible cable probe and rigid probe at the end
  • S-MicroW XL Bendable: with semi-rigi metal bendable probe and rigid probe at the end

For each version it is available the L model too, S-MicroW L Ultra Freeze, which has same diameter but a smaller battery: less battery life but reduced size.

There are also other models of high temperature data loggers, for pressure and humidity too.

Note: if used below -30°C, battery life will be highly reduced. Mission max duration at -80°C: 12 hours. Using the logger for long periods below -40°C will constantly reduce mission max duration. For longer missions purchase the -80°C special battery for S-MicroW XL Ultra Freeze. With -80°C special battery mission max duration at -80°C with the special battery: more than 2 months. Using the logger for long periods below -40°C will constantly reduce mission max duration. Max temperature of use of the -80°C battery is 80°C: REMOVE IT AND USE STANDARD BATTERY TO USE THE LOGGER IN AUTOCLVE OR ABOVE 80°C.


DiskInterface HS, DiskInterface HS Mini - USB drivers Windows XP / Vista / 7
DiskInterface HS, DiskInterface HS Mini - USB drivers Windows 8 / 10
Multibay - USB drivers Windows Xp / Vista / 7
Multibay - USB drivers Windows 8 / 10
DiskInterface (old model) - USB driver Windows XP / Vista / 7 / 8 / 10



Main features

  • With different lengths rigid probe for penetration
  • Completely food grade and waterproof
  • All software calculate lethality value (F0, PU, A0 ecc.)
  • Low battery consumption for an extended battery life
  • User replaceable battery (software shows battery status)
  • Very easy to deploy in any type of package
  • Accredia (NIST equivalent) traceable calibration certificate included from -40°C
  • Available extended calibration from -80°C (order extra calibration points; in case of wide calibration range the accuracy might be worse)



  • Extremely high accuracy and precision: with an accuracy of ± 0,1°C these devices can be employed in any application involving pharmaceuticals, validation, laboratory and medical field
  • High accuracy even outside the calibration range
  • Save money on calibration costs with calibration from -40°C included
  • High accuracy even from -80°C
  • Fast response time thanks to the 3 mm diameter probe
  • Printed reports compliant with health regulations and ISO (data are not editable in the software)

The system

The system is made up by:

  • S-MicroW XL temperature data logger
  • DiskInterface HS or Universal Multibay
  • SPD software or TS Manager software (compatible with the FDA 21 CFR Part 11 regulation)
Dimensions 64 h X 20 Ø (mm)
Probe dimensions Probe base dimensions 3 h X 14 Ø (mm) - Probe 20/100/on demand l X 3 Ø (mm) (l on demand: min. 12 mm / max. 175 mm. For longer probes ask for quotation)
Weight 61 g
Materials Stainless steel AISI316L, PEEK
Temperature range -80 °C ÷ +140 °C
Standard calibration points (temperature) -40/-20/0/25/50/75/100/121/140°C
Extra calibration points (temperature) Within the range -80 °C ÷ +140 °C
Temperature resolution 0,01 °C
Temperature accuracy ± 0,1 °C (within the calibration range)
Memory (n. of acquisitions) 20.224
Acquisition step From 1 every second up, with 1 second steps
Protection degree IP68
Battery life +17.000.000 acquisitions at 1 second step continuously (calculated time @25°C. Battery life may be shorter if used in low temperatures)
Software&Mobile App SPD, TS Manager
Accessories DiskInterface HS, Multibay universale



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