Technical specifications

Physical & environmental properties

Weight200 g
Dimensions103 x 61 x 25,8 mm​
Operating temperature-20°C – 60°C (-4°F to 140°F)
Recommended storage temperature+10°C – 30°C (50°F to 86°F)
Charging temperature0°C – 40°C (32°F to 104°F)
Shock limit2,000g
Casing materialAnodized aluminum
Environmental protectionIP68
EX/ATEX classificationNo


RTC (Real-time-clock)Yes
Time trigger functionYes
Acceleration trigger functionYes
Logging while powering over USBYes

Storage capacity

Type of storageInternal SD Card
Transfer of datavia USB-cable to PC
Storage size32 GB, 64 GB or 128 GB
Max amount of data pointsReLog S: + 30 billion
Relog M: + 60 billion
ReLog L: + 120 billion

3-axis MEMS accelerometer

Sample rate per axisSelectable from 100 Hz to 25,000 Hz (anti-alias filter applied)
Frequency responseX, Y and Z axis: 3dB at 10 kHz
Measurement range+/- 50 g
Shock resistanceShock resistance
Resolution0.002 g
Noise density26 μg/√Hz

Battery specifications

ChemistryRechargable Lithium Ion
Nominal capacity2,500 mAh - 3,500 mAh
Minimum capacity2,400 - 3,400 mAh
Operating temperature-20°C – 60°C (-4°F to 140°F)
Storage temperature1 month : -20°C – 60°C (-4°F to 140°F)
3 months: -20°C – 45°C (-4°F to 49°F)
1 year: -20°C – 20°C (-4°F to 4°F)
Battery time at full sampling rate75
Battery time when using trigger/alarm modeUp to several months of recording (depending on trigger setting, please reach out to us for further specifications)

Temperature sensor

Temperature range−40°C to +150°C (-40°F to 302°F)
Accuracy±0.20°C from −10°C to +85°C at 3.0 V ±0.25°C from −20°C to +105°C from 2.7 V to 3.3 V
Temperature drift0.00073 °C
Resolution0.00078 °C