GL-PH60
Shallow Wide Frequency Band Sei-smometer
Main application fields:
National seismicnet work, stations and regional seismic networks natural earthquake observation. Reservoir-induced seismic monitoring, mine seismic monitoring and oil and gas exploration are wide frequency bands Earthquake observation and underground structure imaging, underwater observation and other research fields can be used for longterm fixed observation and mobile earthquake observation and other scientific investigation.
OVERVIEW
Description
The GL-PH60 Asai Broadband Seismometer, developed by Beijing Gangzhen Technology Co.,Ltd., is a lightweight, low-power, high-performance tri-directional broadband seismometer. Featuring three identical inclined pendulums evenly distributed along the circumference, it incorporates built-in force-balancing electronic feedback circuits, coordinate transfo rmation circuits, andcontrol systems. Key specifications include:1.Operating Environment:-25°C to 60°C temperature range, 0-98% relative humidity; 2.Low Power Consumption: Operating power consumption under 0.7W; 3.High Performance:0.025Hz-10Hz response speed surpassing NLNM(USGSmodel); 4.Easy Installation:Dual-directional pointers ensure orientation accuracy, with automatic pendulum activation uponpower-up, zero-point adjustment when exceeding limits, and automatic lock during powerloss. Automatic zero-monitoring ensures stable operation even during extended monitoring when pendulum position deviates significantly.
Experimental monitoring diagram of GL-PH60 equipment

Top design drawing of GL-PH60 equipment

GL-PH60 noise power spectral density and limit level curve

GL-PH60 Band frequency characteristics and phase frequency characteristics

Technical Parameter
▶ Structure: three-component UVW symmetric structure;
▶ Bandwidth: 0.0167Hz~80Hz flat speed;
▶ Sensitivity: 2000V · s/m±1% (differential output);
▶ Maximum output signal: ±20V (both ends);
▶ Dynamic range:>140dB (0.01~0.05Hz);
▶ Self-noise: 0.025Hz~10Hz lower than NLNM;
▶ Average power consumption: less than 0.7W;
▶ Linearity distortion: better than 0. 1%;
▶ Horizontal sensitivity: better than 1%;
▶ Total harmonic distortion: better than 0. 1%;
▶ I. Consistency: (sensitivity, amplitude frequency, phase frequency) ≤3%;
▶ Parasitism resonance:> 100 Hz;
▶ Power supply: 12V DC (9-18V DC);
▶ Zero adjustment: remote monitoring and zero adjustment, zero point over limit automatic zero adjustment, automatic centering function;
▶ Open and lock swing: electronic open lock swing, automatically open swing when power is on, automatically lock swing when power is off;
▶ Weight: about 5.5 kg (seismometer), about 8 kg (including packing case);
▶ Size: 150×213mm (without handle) 220×220×300mm (package);
▶ Storage environment: -55℃ –80℃;
▶ Motor protection: IP68 (100 meters of water depth (1Mpa) pressure resistance)













