Stand-Alone data loggers
A stand-alone instrument does not require a computer to operate and gather the data. A chart recorder is a common instrument included in this category. It uses a circular piece of paper and different pens to plot the measurements. The chart turns at a precise speed according to the programmed time period, such as a day or week.
Strip chart recorders are similar to circular chart recorders, with the exception that they print from a paper roll. As a result, much longer time durations can be charted before changing the paper.
Chart and strip recorders are limited in the number or data points that can be recorded simultaneously. Typically, there is a maximum of 4 pens available to plot the data.
Computer-Based Data Loggers
A Kaye Validator 2000 is a data logging instrument that can be used as a stand-alone or computer controlled data logger (i.e. tethered to a laptop computer). Up to 3 sensor input modules (SIMs) can be utilized and each SIMs can be configured with up to 12 sensors. Multiple units can also be linked together with an Ethernet cable. The Kaye Validator is 21CFR Part 11 compliant, and includes passwords, audit trails, and user levels. Data can be grouped to aid in calculations and graphing of the data. Data can also be exported to Excel for further analysis. Kymanox also has procedures available to make setup and operation easy for anyone (Kaye Validator SOP).
SmartReaders™ (http://www.acrsystem.com/) are ACR Systems data loggers that are available in many configurations. There are single channel and multi-channel data loggers as well as 8bit and 12bit models. 12bit models have an optional larger storage capacity and faster sampling rates of up to 25 points per second. Optional equipment is required to achieve this sampling rate. All data loggers utilize ACR System’s TrendReader software to configure the data loggers. The software is used to setup the data logger, view and graph the data, and export the data in various formats (including .csv files for Excel).
TempTale (http://www.sensitech.com/) data loggers are available in single and multi-use models. The data loggers are self-contained with internal sensors, memory, battery, and an LCD display. Storage capacity ranges from 1920 to 16,000 data points at sampling rates of 10 seconds to 2 hours. Data can be retrieved from the data logger directly to PDF format, which allows for easy access to the data from any computer. The TempTale Manager Desktop software is also available, and allows the user to view, save, print, graph, or export the data.
Veriteq Data Loggers (www.veriteq.com) are self-contained with internal sensors, memory, and battery. Storage capacity is 35,100 samples and sampling rates range from 10 seconds to once a day with the VL 2000 series. Configuration of the data logger is performed using the vLog software. The software is also used to perform calculations and to view, save, print, graph, compare, and export the data. The vLog software also provides audit trails and encrypted files which meet all the requirements of 21CFR Part 11 compliance.
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