Technical specifications

Physical & environmental properties

Weight220 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 protectionIP67
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

Primary accelerometer

AccelerometerCapacitive MEMS
Main featuresHigh frequency, high G and low noise
Sample rate per axis32,000 Hz 16,000 Hz 8,000 Hz 4,000 Hz
Bandwidth-3dB at 10 kHz
Measurement range+/- 50 g
Shock resistance10,000 g
Resolution1.5 mg
Noise density26 μg/√Hz
Analog anti-aliasing filter cutoff frequency10 kHz
Digital filter32 tap FIR

Secondary accelerometer

AccelerometerCapacitive MEMS
Main features DC accurate, long-term stability and minimal drift versus temperature
Sample rate per axis 4000Hz, 2000Hz, 1000Hz, 500Hz, 250Hz, 125Hz
Bandwidth3 dB at 550 Hz
Measurement range+/- 2.048 g
+/- 4.096 g
+/- 8.192 g
Shock resistance5,000 g
Resolution3.9ug at +/- 2.048 g
7.8g at +/- 4.096 g
15.6g at +/- 8.192 g
Noise density25 μg/√Hz
Analog anti-aliasing filter cutoff frequency1.5 kHz
Digital filterSinc type
Drift 0.15 mg/C maximum, 0.02mg/C typical

Battery specifications

ChemistryRechargable Lithium Ion
Nominal capacityReLog S: 2,600 mAh
ReLog M: 3,000 mAh
ReLog L: 3,400 mAh
Minimum capacityReLog S: 2,500 mAh
ReLog M: 2,900 mAh
ReLog L: 3,300 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 rateReLog S: 80 h
ReLog M: 95 h
ReLog L: 110 h

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
Total temperature drift0.00073 °C
Resolution0.00078 °C