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USB Temperature Data Logger

SL54USB Temperature and Humidity Data Logger

SL54USB and SL54USB-A temperature and relative humidity data loggers

  • -10°C to +85°C Operating Range
  • ±0.5°C / ±5% Accuracy As Standard ±2% Optional
  • No Interface Lead Required
  • Uses TempIT Software




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The SL54USB and SL54USB-A record temperature and relative humidity. The USB data loggers plug directly into the USB port of the computer for configuration. They are then removed from the USB slot and placed where monitoring is required. When the monitoring is complete, the data logger is placed back in the USB slot for data retrieval. They have the ability to record up to 8,000 data points and have a measuring temperature range of -10°C to +85°C and 0 to 95%RH.

Both the SL54USB and the SL54USB-A have a temperature accuracy of ±0.5°C. The SL54USB has an  relative humidity accuracy of ±5%RH and the SL54USB-A has an improved relative humidity accuracy of ±2%RH, an improved temperature accuracy of ±0.1°C and is supplied with a calibration certificate.

Both SL54USB data loggers are fully compatible with our user friendly software - TempIT. TempIT-LITE is free of charge and allows the logger to be set up and the data read and displayed in graphical format. Graphs can be stored, printed or retrieved at a later time. TempIT-LITE can be up-graded to TempIT-PRO which provides various additional features such as data table view, export data to spreadsheet, email graphs, F0 and A0 calculations, and automated mean kinetic temperature (MKT) calculations etc.

The SL54USB will also calculate dew point and absolute humidity.

Please call our sales office on 01684 299 399 for more information.

Power Internal Battery
Battery Life Typically two years at +30°C with a 10 minute sample rate
See detailed battery life calculator for more information
Measuring Range -10°C to +85°C (14°F to +185°F)
0 to 100%RH

±0.5°C from -10°C to +70°C

±0.1°C from 0°C to +50°C
±0.3°C Outside of this range


0.5°C in low resolution mode
0.07°C in high resolution mode


Sample Rate 2 seconds to 24 hours

2 seconds to 1 minute in 5 second steps
1 minute to 1 hour in 1 minute steps
1 hour to 24 hours in 1 hour steps
Number of Readings Stored 8192 in low resolution mode
4096 in high resolution mode
Reusable When Memory Full Yes
Relative Humidity
Dew Point (Calculated)
Absolute Humidity (Calculated)
Waterproofing Due to the vent required to allow humidity measurement, this device is not considered waterproof and care should be taken to avoid moisture ingress.
Delayed Start Yes, you can specify a time and date to start logging up to 1 year in advance with one minute resolution
Software Alarms Yes, high and low alarms can be specified in the software
Intrinsic Safety Meets UL#913 (4th Edit.); Intrinsically Safe Apparatus, approval under Entity Concept for use in Class I, Division 1, Group A, B, C, and D Locations
Material 305 Stainless Steel
Dimensions 70mm (L) x 25mm (W) x 17mm (H)
Warranty 1 Year
IATA 2017 Compliant

Yes, exempt from the regulations

Can be sent on airlines without declaration