The ELOG1 environmental data logger is a highly capable yet relatively inexpensive solution for many types of data logging applications. The ELOG1 provides more measurement inputs than other data loggers of comparable price. While the ELOG1 is highly capable, it is best suited for indoor applications. The case is not water-tight, as can be seen in the rear view picture below. The logger should be protected from precipitation when used outdoors.

The components of ELOG1 are rated for at least 0 to 70 °C (32 to 158 °F) unless noted otherwise.

• Dimensions:
  • Case (mm): 129.03 wide x 133.35 deep x 38.1 high
  • Case (inches): 5.08 wide x 5.25 deep x 1.5 high
• Weight:
  • Assembled with BP and RH options but without batteries: 255 grams (9 oz.)
• Power requirement:
  • Internal - two AA batteries, alkaline or NiCd. New alkaline batteries will power the ELOG1 for over a month.
  • External - any DC source from +3.5 to +6 volts at 50 mA, center positive coaxial power plug, 5.5 mm O.D., 2.1 mm I.D.
• Indicator LED:
  • Off - normal operation.
  • On steady - memory full.
  • On flashing - low battery.
• Non-volatile memory:
  • Data is retained when power is lost and can be downloaded later.
  • 4K bytes of FLASH (program) memory.
  • 16K bytes of EEPROM (data) memory.
• Analog inputs (sampled at 10-bit resolution):
  • Temperature sensor - accuracy better than 2% of full scale.
  • Light sensor - relative light intensity.
  • Relative Humidity (RH) sensor option - range 20% to 90%, -20 to 60 °C, accuracy within ±2%.
  • Barometric Pressure (BP) sensor option - range 65 to 105 kPa (9.4 to 15.2 psi), accuracy within ±1.5%.
    Uses one external analog input.
  • External - two available, one may be used for BP. Hardware configurable gain/filter options.
• Digital (switch) inputs:
  • All three digital inputs are on the external input connector.
  • One input where rising edges are counted during each sample period.
  • Two inputs that are read at the end of each sample period.

Due to the complexity of the ELOG1 environmental data logger it is not offered as a kit. Options can be installed by the user after initial purchase.

The ELOG1 is configured, and data is downloaded, via a terminal program such as HyperTerminal. Environmental data must be loaded into a spreadsheet program, such as Excel, for analysis and display. See the software page for configuration options.