GL-PH120
Shallow Well Type Very Wide Band Seismometer
Main application fields:
The national seismic network, stations and regional seismic networks are available for natural earthquake observation, reservoir induced earthquake monitoring,
mine earthquake monitoring, broadband seismic observation and underground structure imagin for oil and gas exploration, underwater observation and otherresearch fields,Scientific investigations such as long-term fixed observation and mobile seismic observation are carried out.
OVERVIEW
Description
GL-PH120 Shallow-Shallow Very-Wideband Seismometer is the latest R&D achievement by Beijing Gangzhen Technology Co.,Ltd., featuring lightweight, low-power consumption, and high-performance three-directional integrated broadband capabilities.The device consists of three identical inclined suspension pendulums evenly distributed along a circular arc, quipped with built-in forcebalancing electronic feedback circuits, coordinate transformation circuits, control circuits, and other essential components.This instrument features the following characteristics:1.Operating Environment:Temperature range -20°C to 60°C, relative humidity 0-100 %;2.Low Power Consumption: Operating power consumption below 0.75W.3.High Performance Specifications:0.01Hz-10Hz response range, lower than NLNM(USGSmodel);4.Easy Installation:Dual-directional pointer ensures orientation accuracy,with automatic power-on swing adjustment, zero-point recalibration when parameters exceedl imits, and automatic power-off lock.It has the function of automatic zero position monitoring. In long-term observation, when the pendulum position deviates greatly,it will automatically adjust the zero to ensure normal operation.
GL-PH120 equipment test monitoring diagram

Top design drawing of GL-PH120 equipment

GL-PH120 self-noise power spectral density curve

GL-PH120 width frequency characteristics and phase frequency characteristics


Technical Parameter
▶Structure: three-component UVW symmetry, using force balance feedback, error less than 0.6°;
▶Bandwidth: 0. 00833Hz~80Hz speed flat;
▶Sensitivity: ≥1000V. S/M (single end output), ≥2000V. S/M (double end output)
▶M aximum output signal:±20V(double end);
▶Dynamic range:>140 dB (0.01~0.05Hz);>160 dB(1~10Hz);
▶Self-noise: 0.01Hz~10Hz lower than NLNM;
▶Average power consumption: less than 0. 75W;
▶Linearity distortion: better than 0. 1%;
▶Horizontal sensitivity: better than 1%;
▶Total harmonic distortion: ≤-80dB;
▶I. Consistency: (sensitivity, amplitude frequency, phase frequency) ≤3%;
▶Parasitism resonance:> 160Hz;
▶Power supply: 12 V DC (9-24V 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 12kg (earthquake);
▶Size: ①150×220mm (without handle) 220×220×300mm (package);
▶Storage environment: -55℃ –80℃;
▶Transportation and packaging requirements: meet the requirements of GB/T6587;
▶Machine protection: IP68 (100 meters water depth (1Mpa) pressure resistance).













