Same day despatch. We deliver worldwide.

  • Visa
  • Mastercard
  • American Express
  • Shop Pay
  • Apple Pay
  • PayPal
SL64TH Temperature and Humidity Data Logger
SL64TH Temperature and Humidity Data Logger

SL64TH / SL64TH-A Miniature Temperature and Humidity Data Logger With High Accuracy Option

The next generation of miniature temperature and relative humidity data loggers that measures from -20°C to +70°C (-4°F to +158°F) and 0 to 100% relative humidity. With a temperature accuracy of ±0.2°C / ±0.4°F and a relative humidity accuracy of ±3.5%. Compared to the SL50 series data loggers, all dLog data loggers have a larger memory, improved accuracy, non-volatile memory, so the data can be downloaded should the battery be depleted and a remaining battery life indicator.

All dLog data loggers communicate with the USB-powered NFC reader. The same reader can be used with all members of the dLog family. The TempIT5 software also has a remaining battery life feature, and the stored data can still be downloaded even if the data logger battery is dead.

The SL64TH-A is supplied with a UKAS 17025 traceable calibration certificate and improved temperature and relative humidity accuracies.

Starter kits are available with either two or five SL64TH or two or five SL64TH-A temperature data loggers, USB interface cable and the TempIT5-PRO software.

application examples

  • Environmental Monitoring
  • Facilities Management
  • Museums
  • Humidity Sensitive Goods In Transit
  • Pharmaceutical Storage


  • Power : Internal Battery
  • Battery Life: Typically 2 years. Remaining battery life is shown within the TempIT5 software
  • Battery Type: Panasonic BR1632A (non replaceable / non rechargeable)
  • Battery Life Calculator: Click HERE
  • Temperature Measuring Range: -20°C to +70°C (-4°F to +158°F)
  • SL64TH Temperature Accuracy: ±0.2°C (±0.4°F) from 0°C to +50°C (32°F to 122°F), ±0.3°C (±0.6°F) outside of this range
  • SL64TH Humidity Accuracy: ±3.5% RH (10% to 90%), ±5% RH outside of this range
  • SL64TH-A Temperature Accuracy: ±0.1°C ±0.1% of Calibrated Span (±0.2°F ±0.1% of Calibrated Span)
  • SL64TH-A Humidity Accuracy: ±2% RH (10% to 80%), ±3.5% RH outside of this range
  • Resolution: 0.02°C (0.04°F), 0.05% RH
  • Sample Rate: 3 seconds to 24 Hours
  • Maximum Number of Readings Stored: 9500
  • Memory Limit: Yes, programmable total number of readings can be set
  • Reusable When Memory Full: Yes
  • Download Speed: Approximately 60 second for 5,000 readings.
  • Weight: Approximately 6g
  • Temperature Response Time: 63% step change - 90 seconds in circulating air. 10% to 90% step change - 180 seconds in circulating air
  • Humidity Response Time: 63% step change - 90 seconds in circulating air. 10% to 90% step change - 180 seconds in circulating air
  • Waterproofing: IP30 - Protected against solid foreign objects of 2.5mm dia and greater. No water ingress protection
  • Delayed Start: Yes, you can specify a time and date to start logging up to 365 days in advance with one minute resolution
  • Triggered Start: Yes, the data logger be set to start logging when the temperature goes above or below specified values
  • Software Alarms: Yes, high and low alarms can be specified in the software
  • Food Safe Construction: No
  • Material: Nylon 66 + 33% Glass Fibre
  • Dimensions: 22mm diameter x 11mm high
  • Warranty : 1 Year
  • Approvals / Standards : EN 12830

To view the full specification please download the datasheet below.


The SL64TH & SL64TH-A can be programmed to take readings from once every 3 seconds to once every 24 hours. The data loggers can be programmed to start logging immediately, on a specific time and date, if the measured temperature goes above or below preprogrammed limits or even, after specific time period and also above or below preprogrammed temperature limits.

Starter kits are available with either TWO or FIVE temperature data loggers, the USB Interface and the TempIT5-PRO software. 

The SL64TH is a self contained, multiple use, small temperature and relative humidity data logger with the ability to record up to 9,500 temperature and humidity readings over the temperature range of -20°C to +70°C and 0 to 100% RH with an accuracy of ±0.2°C and 3.5%.

The SL64TH-A is supplied with a UKAS Traceable calibration certificate and an improved accuracy of ±0.1°C ±0.1% of calibrated span (minimum span of 20°C). The default calibration points are 0°C, +20°C and +40°C and 21% RH, 43% RH and 75% RH at an ambiet temperature of 21°C. Contact us if you require different calibration points. You can choose any three temperature points from -19°C to +69°C and there must a a difference of 20°C or more between the highest and lowest calibration points. For the humidity calibration, you can choose three humidity points from 10% to 90% at ambient temperature from +10°C to +40°C. It is possible to have more than three calibration points but please contact us for more information.

Being only 22mm in diameter and 11mm thick, the SL64TH is an incredibly small temperature data logger, ideal for use in confined spaces. 


The memory can hold up to 9,500 readings and can be cleared at the start of each data logging session, allowing the data logger to be reused over and over. 

The SL60-READER NFC interface is required to connect to the USB port of the computer and is compatible with the user friendly, and free of charge, TempIT5-Lite operating software. This enables the miniature temperature data logger to be set up and the readings downloaded from the data logger and displayed in a graphical format. Data can also be saved and retrieved at a later time. The software can be upgraded to TempIT5-Pro which provides various additional features such as data table view, export data to spreadsheet, graph annotations, and automated MKT, F0, A0 and PU calculations.

TempIT5 Temperature and Humidity Graph 

The NFC USB Interface lead and software are not included with this temperature data logger unless you purchase one or more of the starter kits but you can find details of these and other related items in the accessories section.


Enquire About This Product

To enquire about this product please ring us on 01684 299399 or click below