SL54TH / SL54TH-A Temperature & Humidity Data Logger

SL54TH / SL54TH-A Temperature And Relative Humidity Data Logger

The SL54TH is our lowest cost miniature temperature and relative humidity data logger. It is self contained and self powered with the ability to record up to 8,000 data points. The SL54TH can operate in a temperature range of -20°C to +85°C and up to 100%RH with an accuracy of ±0.5°C and ±5% relative humidity. The SL54TH-A has an improved relative humidity accuracy of ±2% and is supplied with a UKAS 17025 traceable calibration certificate.

The SL54TH and SL54TH-A are very small temperature and relative humidity data loggers (about the same size as a watch battery) which enables them to be inserted into small items and packages.

The SL50 Button Reader interfaces to the USB port of a PC and is compatible with the user friendly, TempIT-LITE operating software which enables the logger to be set up and the data read and displayed in graphical format. Data can be stored and retrieved at a later time. The software can be up-graded to TempIT-PRO which provides various additional features such as data table view, export data to spreadsheet, email graphs and automated MKT Calculations etc. The TempIT software also automatically calculates dew point from the measured temperature and relative humidity readings.

Starter kits are available with either two or five data loggers, the USB interface lead and the TEMPIT-PRO software:

The SL54TH and SL54TH-A also calculate dew point and absolute humidity.

The USB Interface lead and software are not included with this temperature data logger but you can find details of these and other related items below.

Specification

Power	Internal Battery
Battery Life	Typically two years at +30°C with a 10 minute sample rate
Measuring Range	-20°C to +85°C (-4°F to +185°F) 0 to 100%RH (0 to 90% continuous, 90% to 100% for short periods)
Accuracy	SL54TH ±0.5°C from -10°C to +70°C ±5%RH for the SL54TH SL54TH-A ±0.1°C ±0.1% of calibrated span Default temperature calibration points 0°C, +25°C & +50°C ±2%RH from 10%RH to 90%, ±5% outside of this range. Default relative humidity calibration points 11%, 43% and 75% Other calibration points available on request
Resolution	0.5°C in low resolution mode 0.07°C in high resolution mode 0.04%RH
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
Response Time	Response times in moving air: 63% time constant Temperature: 1 Min 29 Seconds Relative Humidity: 3 Min 44 Seconds 10-90 % time constant Temperature: 2 Min 50 Seconds Relative Humidity: 9 Min 54 Seconds
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. See environmental considerations below.
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	17mm diameter x 6mm high
Warranty	1 Year
Environmental Considerations	Like all relative humidity sensors, when exposed to contaminants and/or conditions toward the limits of the safe operating range, accuracy degradation can result. For maximum long-term stability, the sensor should not be exposed or subjected to organic solvents, corrosive agents (e.g., strong acids, SO2, H2SO4, CI2, HCL,H2S) and strong bases (i.e., compounds with a pH greater than 7). Dust settling on the filter surface does not affect the sensor performance except to possibly decrease the speed of response.