MEMS vibration sensor DynaLogger HF+

for machine monitoringmotorfor compressors

Overview
The DynaLogger HF+ and HF+s triaxial vibration and temperature sensors identify failure modes and defects across a wide range of industrial assets. Wide frequency coverage supports low- to high-speed equipment; an online platform provides spectral analysis and continuous condition monitoring tools.

Monitoring modes
Telemetry

• Configurable metrics by frequency band
• Acceleration (RMS)
• Velocity (RMS)
• RMS displacement
• Peak
• Peak-to-peak
• Crest factor
• Skewness
• Kurtosis
• Contact temperature

Spectral / waveform

• Spectrum
• Linear, circular and orbital waveforms
• Frequency filters
• Cepstrum
• Envelope (demodulation)
• Autocorrelation
• Spectral waterfall
• Multi-metrics

Advanced metrics

• Multiband RMS
• Envelope RMS
• Peak-to-peak
• Kurtosis
• FC and FC+
• Carpet energy
• Energy at 1X and harmonics in velocity
• 1X BPFO, BPFI, BSF and FTF in envelope and envelope RMS

Key figures

• Maximum frequency: 13 kHz
• Spectral noise density: < 75 μg/√Hz
• Lines of resolution (uniaxial): 98,304
• Estimated battery autonomy: 5 years
• Max. operating temperature (HF+s, batches ≥ 053): 105 °C
• Free field range (Bluetooth 5.3): 100 m

Features

• Compact form factor with wide frequency range up to 13 kHz
• Long-life 3 V battery — estimated autonomy 5 years under typical conditions
• High spectral and amplitude resolution for detailed diagnostics
• Extensive metrics — 200+ time and frequency metrics by band
• Suitable for low-speed machinery from >10 RPM
• Low spectral noise (< 75 μg/√Hz)
• Simultaneous triaxial measurement (x, y, z)
• Remote firmware updates

Applications

• Motors, pumps and fans
• Compressors and chillers
• Gearboxes, including planetary gearboxes
• Vibrating screens
• Rollers
• Internal components of harvesters and off-road vehicles
• Overhead cranes and yard equipment
• Wind turbines
• Bearings in high- and low-speed assets

Technical specifications
General
Dimensions: HF/HF+s (stainless steel base): 39 × 39 × 35 mm
HF+s (full stainless steel base): 39 × 39 × 39 mm
Weight: HF+ (aluminum base): 73 g; HF+s (stainless steel base): 97 g; HF+s (full stainless steel base): 110 g
Material: Case: LEXAN™; Sensor pin and base: stainless steel or aluminum
Mounting: Glued or screwed
Visual signaling (LED): Red / green

Sensors
Accelerometer: MEMS triaxial
Accelerometer impact limit: 10,000 g in 0.2 ms

Power
Battery voltage: 3 V
Autonomy: 5 years (estimate for typical use patterns)

Environment
Operating temperature: HF+: −10 °C to 84 °C; HF+s, batches < 05: −10 °C to 84 °C; HF+s, batches ≥ 053: −10 °C to 105 °C
Certified operating temperature for explosive atmospheres: HF+ and HF+s: −10 °C to 79 °C; HF+s, batches ≥ 053: −10 °C to 105 °C

Communication
Wireless communication: Bluetooth 5.3 (2,400 to 2,483.5 MHz)
Free field range: 100 m (depends on obstacles and interference)
RF output power: 0.4 dBm

Telemetry
Monitoring interval: 1 to 60 min
Monitored metrics: RMS acceleration, RMS velocity, contact temperature
Temperature resolution: 0.01 °C
Frequency bands: Factory standard: 34 Hz to 13 kHz and 3 Hz to 13 kHz (adjustable)
Frequency response (±3 dB): 7.6 kHz
Amplitude range: Up to ±16 g
Memory: 51,200 samples (adjustable)

Spectral
Spectral noise density: < 75 μg/√Hz
Sample rate: Up to 26 kHz
Frequency response (±5%): 7 kHz
Frequency response (±3 dB): 7.6 kHz
Min. frequency resolution: 0.006 Hz (8 bits) · 0.012 Hz (16 bits)
Min. amplitude resolution: 16 mg (8 bits) · 61 μg (16 bits)
Amplitude range: Up to ±16 g
Lines of resolution (LOR): 98,304 (uniaxial) · 32,768 (triaxial)
Max. frequency: 571 Hz to 13 kHz (adjustable)
Max. acquisition time: 172.2 s (uniaxial) · 57.3 s (triaxial)

Product specifications

• Product family: DynaLogger HF+ / HF+s
• Max. frequency: 13 kHz
• Spectral noise density: < 75 μg/√Hz
• Lines of resolution (uniaxial): 98,304; (triaxial): 32,768
• Sample rate (spectral): up to 26 kHz
• Amplitude range: ±16 g
• Accelerometer type: MEMS triaxial
• Battery: 3 V, estimated autonomy 5 years (typical usage)
• Wireless: Bluetooth 5.3, free field range ~100 m
• Dimensions (example): 39 × 39 × 35 mm (stainless steel base)
• Weight range: 73 g to 110 g depending on base material
• Operating temperature examples: −10 °C to 84 °C (standard); HF+s batches ≥ 053 up to 105 °C
• Ingress protection (selected batches/certifications): IP66 / IP68 / IP69K