ES-Net

Physical Specifications

Parameter	Value	Unit
Length	70	mm
Width	35	mm
Height	24	mm
Weight	36.8	g
Protection	IP10	-
Operating Temp	-20 ~ 65	°C

Temperature Usage Warning

Enclosure Material Limitation

• Electronic components have been tested to operate normally at 65°C
• Due to PLA material enclosure, recommended operating temperature limit is 60°C
• Prolonged exposure above 60°C may cause PLA enclosure deformation

Electrical Specifications

Parameter	Value	Unit
Min Voltage	4.5	V
Max Voltage	5.2	V

Power Consumption

Mode	Voltage	Power	Unit
Online Mode	4.5V	0.4	W
Online Mode	5.2V	0.6	W
Offline Mode	4.5V	0.7	W
Offline Mode	5.2V	0.8	W

NTP Time Synchronization

Parameter	Value
Sync Period	120s
Time Accuracy	50ppm
Time Error	±10ms

Mode Description

Online Mode

Recommended Mode

• NTP time synchronization enabled, typically provides error of ±10ms
• Time accuracy: 50ppm
• Sync period: Auto-sync every 120s

Offline Mode

warning

• NTP time synchronization disabled
• Data transmission via UART
• Waveform timing is less accurate

Sensor Specifications

Basic Parameters

Parameter	Value
Sensor Type	MEMS Seismometer
Sensor Axes	Three-axis (XYZ)
Frequency Range	DC-25Hz
Sampling Rate	50 SPS
Data Resolution	16 bit
Noise Density	60 µg/√Hz
Full Scale	2G (approx. 1961 gal)

Filter

Built-in filter includes time-domain and frequency-domain filtering:

Time-Domain Filter (BPF)

• HPF: 11-stage IIR, approximately 1Hz cutoff frequency
• LPF: 11-stage IIR, approximately 10Hz cutoff frequency

Frequency-Domain Filter

• Attenuation below 0.5Hz
• Attenuation above 10Hz
• Periodic effect compensation: √(1/f)

Communication Specifications

Wired Communication

Parameter	Value
Interface	USB Type-C Serial Port (UART)
Baud Rate	115200 bps
Data Format	Binary

Output Data

• Three-axis acceleration (gal)
• Three-axis acceleration-filtered (gal)
• JMA Measured Intensity
• PGA(a)

Wireless Communication (Wi-Fi)

Parameter	Value
Frequency Band	2.4 GHz
Standard	802.11 b/g/n
Antenna Output	20 dBm (max)