Products

MidLine Posthole 2 Hz Seismometer  –  A_F2-GS-70

The A_F2-GS-70 is ASIR’s readily deployed slimline deep borehole seismometer for use in microearthquake detection and monitoring. The A_F2-GS-70 is designed for installation in up to 100m holes with up to 1° tilts. The A_F2-GS-70 features the highest current performance level in sensitivity, reliability, and longevity for micro-earthquake detection.

FeaturesASIR AG002-01-4.5 img02
75” outer diameter for NQ boreholes
Passive sensors in fixed position
For permanent or temporary installations

Parameter                           Specification
Geophone orientation           3 components triaxial
Natural frequency                 2 Hz
Tilt tolerance                         1°
Depth range                          100 m
Operating temperature         -40° to +70°
Coil resistance                     3810 Ohms
Sensitivity                            78.7 V/(m/s)
Open circuit damping          0.58
Moving mass                       11.3 g
Max motion p-p                    4 mm

Dimensions
Outer diameter                     2.75 in (70 mm)
Height                                  13 in (330 mm)
Weight                                 10 lbs (4.5 kg)
Casing material                   304 stainless steel


SlimLine Posthole Fixed 4.5 Hz Seismometer  –  A_F4.5-SF-50

The A_F4.5-SF-50 is ASIR’s readily deployed slimline shallow posthole seismometer for use in microearthquake detection and monitoring. The A_F4.5-SF-50 is designed for installation in up to 100m vertical holes. The A_F4.5-SF-50 features the highest current performance level in sensitivity, reliability, and longevity for micro-earthquake detection.

FeaturesASIR Model AF4.5SF50
Slim design 2” diameter for BQ boreholes
Passive sensors in fixed position
For permanent or temporary installations

Parameter                            Specification
Geophone orientation           3 components triaxial
Natural frequency                 4.5 Hz
Tilt tolerance                         3°
Depth range                          0 to 100 m
Operating temperature         -40° to +70°
Coil resistance                     3400 Ohms
Sensitivity                             82 V/(m/s)
Open circuit damping           0.58
Moving mass                       11.3 g
Max motion p-p                    4 mm

Dimensions
Outer diameter                     1.97 in (50 mm)
Height                                   10.5 in (267 mm)
Weight                                  5 lbs (2.3 kg)
Casing material                    304 stainless steel


MidLine Broadband Borehole Seismometer – A_F200-SA-70

The A_F200-SA-70 is ASIR’s broadband seismometer- accelerometer for use in regional earthquake networks. The A_F200-SA-70 is designed for installation at depths from several meters up to 3000 meter. The A_F200-SA-70 uses the latest optic sensor design to provide acceleration response from 200 s to 1 kHz.

Features
Rugged optical sensors with high shock tolerance
Posthole and deep NQ boreholes
High tilt tolerance

Parameters                         Specifications
Geophone orientation           3 components
Bandwidth                             0.005 Hz to 1 kHz
Clip level                               2g
Tilt tolerance                         15°
Depth range                          Posthole to 100 m
High pressure to 3000 m
Operating temperature         -20° to +75°
Sensitivity                             15 V/g
Distortion                              <0.03%
Power requirement               40 mW/axis

Dimensions
Outer diameter                     2.75 in (70 mm)
Height                                    13 in (330 mm)
Weight                                   22 lbs (10 kg)
Casing material                     stainless steel