Select Page

Event & Timing Data Loggers

Event & Timing Data Loggers

Most data loggers simply take measurements and record them regularly at fixed time intervals. But what if you don’t want to record continuously, but you just want to know when an event happens? For example you might need to know when a motor switches on or off, or when the power drops out and for how long. It’s not convenient to use a regular data logger for this, as you’ll get large amounts of data that you have to process just to find out a small piece of information, and the logger’s memory could even fill up before it records the event you’re interested in.

The solution is to use an event data logger, which monitors its inputs and only records data when a specified event happens. There are only a few such devices on the market. Some are general purpose with “dry contact” connections; some can be fully programmed to log whatever events you want based on whatever inputs you have; while others are designed for specific purposes such as monitoring mains power for outages, surges and sags. Scroll down to see our selection.

AEMC Event Data Logger

AEMC Data Logger Model L452

The Model L452 is a low cost, simple to use, two-channel data logger. It records DC voltage, DC current, pulses and events. Its two input channels allow the user to connect to various types of sensors in order to record data such as pressure, temperature, flow, humidity and more.

AEMC Data Logger Model L452
Click here to show/ hide more info

AEMC Data Logger Model L452

The Model L452 is a low cost, simple to use, two-channel data logger. It records DC voltage, DC current, pulses and events. Its two input channels allow the user to connect to various types of sensors in order to record data such as pressure, temperature, flow, humidity and more. This logger can also be used to record events such as machine run time. Each channel’s real-time measurement is displayed on the LCD screen.

The L452 communicates via USB or Bluetooth for configuration and data transfer to a PC using the free DataView software included with the unit. The logger can also be configured using its front panel with a very simple user interface.


Channels Two with LCD display
Input 4mm safety banana jacks
Ranges (4) 100mV/1V/10V, 4 to 20mA, Event & Pulse
Accuracy ± 100mV, ±1V, ±10V:  ±(0.5% R +1ct)
  4 to 20mA ±(0.25% R +5ct)
Resolution Pulse: 3.3V (with 1MΩ pull up resistor)
  Event: ± 10V
Input Impedance V DC: 1MΩ, DC current: 100Ω Event: 1MΩ, Pulse N/A
Sample Rate Max V & Current DC: 5 samples/s, Event 16 samples/s, Pulse 100 samples/s
Storage Rate Programmable from 200 ms to 60 minutes
Storage Modes Start/Stop
Recording Length 15 minutes to 6 weeks, programmable using DataView
Memory 32MB recorded data is stored in non-volatile memory and will be retained even if battery is low or removed.
Communication USB 2.0, Bluetooth 2.1 Class 1 (100m)
Power Source 2×1.2V 400mAh NIMH
Charger (Supply) Rechargeable by main 110 to 240V 50/60Hz or via USB cable
Battery Life (Display ON) 18 days @ 200ms sampling rate, 27 days @ 60s
Battery Life (Display OFF) 36 days @ 200ms sampling rate, 270 days @ 60s
Dimensions 4.92 x 2.60 x 1.30” (125 x 66 x 33mm)
Weight (with battery) 7.4 oz (210g)
Case Polycarbonate
Operating Temperature 32° to 122°F (0° to 50°C)
Storage Temperature -4° to 140°F (-20° to 65°C)
Relative Humidity Up to 90% @ 104°F (40°C)
Ingress Protection (IP) IP40
EMC EN 61326-1
Safety Compliance IEC 61010-1, EN 61010-2-30

Data sheet on AEMC Data Logger Model L452 (pdf, opens in a new tab)

DataTaker Data Loggers

DT80-85 From two channel data loggers up to systems with hundreds of analog inputs and many digital inputs. These loggers read & store analog & digital data in engineering units from just about any electrical sensor or analog instrument. Thermocouples, transistor temperature sensors, RTDs, strain gauges, current loop outputs from other instruments, voltages, currents, resistance, frequency, period, digital state, pulses etc. For AC power measurements you can connect a Modbus power meter such as Dent PowerScout.

The loggers are easily set up for basic data logging jobs using the dEX graphical browser based interface. However if you have a special requirement, for example to start logging when an event happens, you can program the logger using its extensive scripting language to do almost any task. Not confident about programming? Ask ESIS’ engineers to do it for you – we have experience programming DataTakers for a wide range of tasks.

See DataTaker Data Loggers (this site, opens in a new tab)

ACR PowerWatch Voltage Disturbance Recorder

ACR PowerWatch Do you have equipment failing repeatedly or behaving strangely? Expensive out of warranty repairs due to voltage surges? Get to the root of the problem by measuring your incoming mains voltage and recording every surge, sag, spike and dip that happens.

PowerWatch 220/240V is the easiest way to monitor and record critical voltage disturbance information from any 220/240 volt Australian power outlet. Just set up your pre-determined voltage threshold values, or use the industry standard default values, and plug it in to a GPO power point. No wiring or dangerous connections required.

The data you record with the PowerWatch can be easily presented to your electricity authority or building manager, for discussion and complaints about power quality.


  • Troubleshooting repeated equipment failures
  • Medical and scientific equipment
  • Point-of-sale terminals
  • Computers
  • Other sensitive electronic equipment


PWV-002-A PowerWatch Power Quality Analyzer/Event Recorder (220 Volt, Australian plug style): $968+GST

See ACR PowerWatch Voltage Disturbance Recorder (this site, opens in a new tab)

ACR SmartReader Plus 9 Pulse Data Logger

SmartReader Plus 9 The SmartReader Plus 9 is a versatile data logger designed for easy counting and recording of switch contact closures and voltage pulses. It has two pulse/contact channels. Durability is assured with a 3-year logger warranty and 10-year battery life.

While not strictly an “event” logger, this device counts pulses in each time interval and records the pulse counts. It’s mainly designed to connect to things like water and gas meters, but it can be used for any application where you need to know how many times a pulse or switch type event happened in each time interval.


Monitoring fluid (eg. water meters) and air flow, energy consumption from power meter pulse outputs, wind speed, shaft RPM, and rainfall (from tipping bucket sensors), etc.

Part No Product Name Price (ex-GST)
SRP-009-128K SmartReader Plus 9, Pulse Data logger with 2 inputs $1655+GST

See ACR SmartReader Plus 9 Pulse Data Logger (this site, opens in a new tab)

Call Now Button