GL-PH2
Shallow Well Short Period Seismometer
Main application fields:
●UVW three-way integrated structure
●Positional transduction, electronic feedback
●Bandwidth: 0.5Hz~80Hz
●Large dynamic range:>140dB
●Small size, low power consumption
●Strong anti-tilt ability
OVERVIEW
Description
The GL-PH2 seismometer is designed for underground seismic monitoring. The GL-PH2 model incorporates a stabilizer, cable stress reliever, triaxial mechanical pendulum, and feedback circuit housed within a sealed cylin der, with it supper section connected to both components. During installation, geostatism is first use dtodetermine the azimuth of the wellbase. When the sealed cylinder descends into the borehole, the seismic sensor’s orientation precisely aligns with the geographic coordinates. Featuring a rational structural design, simplified construction, stable performance, tight cementseal, and strong resistance to tilting, the GL-PH2 seismometer is recommended for installation depths ranging from 0 to 30 meters.
Technical Parameter
▲Mechanical structure: UVW threedirectional integrated installation
▲Mode of transduction: displacement transduction
▲Output signal direction: vertical (UD), east-west (EW), north-south (NS)
▲Output physical quantity: ground motion speed
▲Bandwidth: 0.5Hz~80Hz
▲Maximum output signal: ±10V (single end), ±20V (double end)
▲Sensitivity: 2000V/ (m/s)
▲Dynamic range:>140dB
▲Limiting level: 10mm/s@10Hz
▲Horizontal inhibition ratio:>1%
▲Parasitic resonance:> 150Hz
▲Self-noise level: 0.5Hz~10Hz is lower than NLNM
▲Anti-tilt capacity: ≤5°
▲Output resistance: <100Ω
▲Output current:>5mA
▲Load capacitance:>0.01uF
▲Power supply voltage:9~18V
▲Sensitivity:9~12m/(s2)/A
▲Power consumption:0.8W
▲Zero adjustment and monitoring:built-in zero a djustment motor, support for command zero adjustment and remote monitoring
▲Seal chamber size:φ114mm,H245mm
▲Applicable well inner diameter:φ120 mm~φ136mm, standard well is φ136mm
▲Working temperature:-25℃~60℃
▲Sealing material:304 stainless steel
▲Sealing method: end face and side surface are sealed at the same time
▲Sealed plug: anti-sea water stainless steel connector
▲The depth of the whole machine into the well is 0~50m
▲Weight: 12kg(seismograph)













