The Event101A is a compact data logger that records occurrences of a specific event. Includes declaration of conformance. Read More >

Key Features:

  • Compact Size
  • 10-Year Battery Life
  • Input Range up to 30 V



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The Event101A is a compact data logger that monitors and records the occurrences of a specific event. With a 10-year battery life, the Event101A is ideal for long-term field studies that focus on when a specific event happens and for how long.

This device offers an input range of up to 30 V with a storage capacity up to 838,041 readings. The Event101A can be configured to utilize the memory wrap option to extend deployment capability or programmed to start at a specified date and time up to 18 months in advance.

The Event101A  is compatible with the latest MadgeTech 4 Software making starting, stopping, and downloading simple and easy. Graphical, tabular, and summary data is provided for analysis and can be viewed as customizable engineering units.


Memory465,578 readings
Reading Rate4 Hz to 1 every 24 hours
Baud Rate115,200
LED IndicatorsRed and Green
Battery Life10 years typical, dependent upon frequency and duty cycle
Dimensions1.4 in x 2.1 in x 0.6 in (35 mm x 54 mm x 15 mm)
Operating Environment-40 °C to +80 °C (-40 °F to +176 °F), 0 %RH to 95 %RH non-condensing
Required Interface PackageIFC200


Input Range0 to 30 V
Input Low<0.4 V
Input High>2.8 V
Internal Weak Pull-up<60 μA
Input Impedance60000 Ω
Minimum Input Active (Low)10 Microseconds


Event101A Specification Sheet

Event101A Product User Guide

State/Event/Pulse Application Note

Support Videos

Event101A | Changing the Battery

Event101A | The Difference Between Event, State & Pulse


Part Numbers

Event101A — 900103-00


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