Short-period Seismometer

Model S-13J

344 V/(m/sec) sensitivity
Mass lock
Simplified field maintenance

The S-13J is a 1.0 Hz short-period sensor that is ideal for portable applications which require exceptional performance in a small size. The design and resulting stability of the S-13J are inherited from the time-proven Model S-13. These features result in a sensor that seldom requires adjustment and is simple to maintain in the field. A package called S-13J/3 contains three sensors S-13J perpendicularly mounted on a base plate with an air buble and a handle.

S-13J/3 shown

TECHNICAL SPECIFICATIONS

OPERATING CHARACTERISTICS

Mode of Operation
Natural frequency
Tilt
Inertial mass
Temperature Range
Transducer
Type
Damping
Generator constant
Coil resistance
Maximum Mass Travel
Calibration Coil Resistance
Dynamic range
Submerged operating

- Vertical or horizontal, non-convertible
- 1 Hz, factory adjustable
- Operates within 4º of vertical
- 0.94 kg (2.07 lbs.)
- -51 to +60 ºC (-60 to +140 ºF)

- Moving coil (velocity)
- Electromagnetic
- 344 V/(m/sec)
- 6450 Ohms
- ±1.5 mm (0.06 in.)
- 29 Ohms, calibration coil well separated from the signal coil
- 140 dB @ 1 Hz and 160 dB @ 100 Hz
- Up to 30 m

PHYSICAL CHARACTERISTICS

Dimensions
Height
Diameter
Net Weight
Shipping Data
Weight
Volume

- 18.5 cm (7.3 in.) over handle
- 10.2 cm (4.0 in.)
- 3.05 kg (6.73 lbs.)

- 6.0 kg (13.2 lbs.)
- 0.019 m³ (0.65 ft³.)