MSR voltage data loggers use configurable analogue inputs to record voltage signals or the analogue outputs of external sensors. Depending on the model and ordered configuration, supported unipolar voltage ranges extend up to 0–48.0 V. The number of inputs, maximum recording rate, memory and data-access method differ substantially between models.
| Model | Best suited for | Analogue inputs | Maximum analogue rate | Memory | Access and distinguishing features |
|---|---|---|---|---|---|
| MSR160 | High-speed, multi-channel voltage or sensor-output recording | 4 configurable 12-bit inputs; selectable configurations include voltage ranges up to 0–48.0 V | Up to 1,000 readings per second per channel | More than 2 million measured values; more than 1 billion with the optional microSD card | USB; rechargeable battery; optional temperature, humidity, pressure, attitude and light sensors |
| MSR145W2D | Voltage monitoring where WiFi access, alarms or cloud transfer are required | 4 or 8 configurable 12-bit inputs; selectable configurations include voltage ranges up to 0–48.0 V | 1 reading per second to one reading every 12 hours | More than 1 million measured values | USB and WiFi; OLED display; MSR SmartCloud; configurable internal sensors and external FlexSensors |
| MSR145WD | Local wireless readout using Bluetooth on a smartphone or tablet | 4 or 8 configurable 12-bit inputs; selectable configurations include voltage ranges up to 0–48.0 V | 1 reading per second to one reading every 12 hours | More than 1 million measured values | USB and Bluetooth Low Energy; OLED display; MSR DataLogger App; optional SmartCloud transfer through a suitable gateway |
| MSR145 | Configurable standalone measurements requiring more memory or mixed parameters | 2 or 4 configurable 12-bit inputs; selectable configurations include voltage ranges up to 0–48.0 V | Up to 50 readings per second; 1 reading per second when combined with the A4 acceleration sensor | More than 2 million measured values; more than 1 billion with the optional microSD card | USB; extensive choices of housings, batteries and additional sensors; recording time up to 2 years depending on configuration and rate |
| MSR255 | Installations that benefit from an integrated display and external-sensor power control | Optional 4 configurable 12-bit inputs; selectable configurations include voltage ranges up to 0–48.0 V | 1 reading per second to one reading every 12 hours | More than 2 million measured values | USB; 4-row backlit LCD; rechargeable 2,300 mAh battery; configurable switching power supply for external sensors |
Select the smallest supported input range that still covers the complete expected signal. The listed analogue inputs use 12-bit conversion, but resolution alone does not define total measurement accuracy. Include the external sensor, wiring and complete signal chain when assessing uncertainty.
The MSR160 records up to 1,000 readings per second per analogue channel. The MSR145 reaches up to 50 readings per second, subject to configuration. The wireless MSR145WD, MSR145W2D and the MSR255 record analogue inputs at up to 1 reading per second.
Choose enough analogue channels for every signal that must be recorded simultaneously. Then decide whether USB is sufficient or whether the application benefits from WiFi, Bluetooth, cloud transfer or an integrated display.
During field testing of the ParaGolfer electric wheelchair, Otto Bock engineers used MSR145 and MSR160 data loggers over several weeks. Sensors connected to four analogue inputs recorded current, voltage, speed and temperature. The MSR160 recorded these values at 16 Hz, and the optional microSD memory allowed more than one billion measured values to be stored.
No. The required analogue-input configuration must be selected when configuring or ordering the logger. Eg. the MSR255 analogue inputs are explicitly optional, and the configurable models offer different numbers of inputs and input ranges.
A 0–48.0 V input configuration is available for the models compared above. The connected signal must remain within the configured range. Mains voltage must not be connected directly.
Yes, appropriate current-input configurations are also documented. See the current data logger category for the corresponding selection.
The MSR160 has the highest documented analogue rate among these models: up to 1,000 readings per second per channel.
No. Resolution describes the number of digital levels available from the converter. Overall accuracy also depends on the logger input, the selected range, the external sensor, wiring, noise and calibration.
Provide the number of signals, minimum and maximum voltage, required recording rate, monitoring duration, data-access method and any additional sensors. Also state whether the source is floating or whether electrical isolation is required.
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