MET
Tech, Inc.
Superior Performance
at a Competitive Cost
Short-period Seismometer Model 3111
•
Low self-noise;
• >120 dB dynamic range;
• No moving parts to be broken or wear out;
• High-gain;
• No maintenance;
• Low power consumption
The Model 3111 is an economical, compact size, short-period seismometer, available in one and three-component configurations. It's well suited for portable and permanent installations in locations with the background noise close to the Low Noise Model.
TECHNICAL SPECIFICATIONS
Transducer Type |
Molecular Electronic Transfer |
|---|---|
| 3111-V |
Uniaxial vertical |
3111-H |
Uniaxial horizontal |
3111-3 |
Triaxial |
Frequency response |
1 Hz - 50 Hz Flat velocty response -3 dB @ 1Hz corner frequency |
Sensitivity |
400 V/m/sec - differential output |
Self noise |
5 nm/sec peak velocity over the passband |
Clip level |
±2.5 V |
Dynamic range |
122 dB |
Mass Lock |
NOT REQUIRED |
Mass Centering |
NOT REQUIRED |
Maximum Installation Tilt |
±15 ° |
Mechanical Resonances |
NONE |
Power Supply |
15 mA 3011-3 @ 12 VDC nominal; 5 mA 3011 -V(H) @ 12 VDC nominal |
Operating temperature range |
-12 to + 55 °C |
PHYSICAL PARAMETERS
Housing material: Aluminum
Model |
3111-3 | 3111-V | 3111-H |
|---|---|---|---|
Case Diameter |
180 mm |
115 mm |
115 mm |
Case Height |
140 mm |
140 mm |
140 mm |
Weight |
5.1 kg |
2.1 kg |
1.3 kg |