ACR Systems from Canada manufacturer a range of self powered and pocket sized data loggers that a suitable for various applications where stand alone data logging is a must. They measure and record a range of input signals including 4-20ma signals, temperature, humidity and pressure.
Power Quality 120V or 240V high speed Voltage Disturbance Recorders.
The PowerWatch recorder from ACR Systems is the simplest way record voltage spikes and transients, dips or any voltage disturbances. Set your upper and lower voltage thresholds with the PC software, plug the PowerWatch in to any 240 volt Australian power point and you're away. You have your first event when the red light on the unit turns on.
There are various models in the SmartReader Plus range: Thermistor, Thermocouple, RTD, RH%, Pulse, Voltage, Current(4-20mA), Pressure, AC current & voltage, Alarm module.