SMC-1850

PRODUCT DETAILS

The SMC-1850 High-Temperature Geophone has been tested at 200ºC for more than 300 hours with no loss in performance specifications. Its design structure and super-strength magnetic field make the output of this small geophone equal to or greater than the output of larger vibration monitoring units. Its rotating dual-coil construction withstands severe shocks and rough handling. The patented PCB header provides easy and reliable electrical connections.

FEATURES

All units tested at 200ºC
Ideal for VSP, triaxial, and gimbal downhole operations
Full one-year warranty
Small size, high output
Patented PCB header
100 percent burn-in of basic units

MECHANICAL SPECIFICATIONS

Orientation	Omni (Vertical and Horizontal also available)
Moving Mass	6.6 g (0.23 oz)
Maximum Coil Excursion p-p	3.05 mm (0.12 in.)
Diameter	2.22 cm (0.875 in.)
Height	2.64 cm (1.04 in.)
Weight	44 g (1.52 oz)
Storage Temperature	–40°C to +100°C (–40 to +212°F)
Operating Temperature	–40°C to +200°C (–40 to +392°F)

ELECTRICAL SPECIFICATIONS 25°C

Frequency	15 Hz *
Spurious Frequency	365 Hz
Distortion at Vertical	< 1%
Coil Resistance	1850 Ω *
Open-Circuit Sensitivity	40.16 V/m/s (1.02 V/i/s)
Sensitivity at 70% Damping	27.56 V/m/s (.70 V/i/s)
Open-Circuit Damping	47%