Naic98
08-24-2009, 10:19 PM
Looking fora source of surplus geophones to build a seismometer for my High School Earth Science Class, thanks, Carpe Ductum
Radical Brad
08-25-2009, 11:40 AM
Mark Products / National Research Geophone - LP02480485 SC0833 MFG 03-89
$ 60.00 US Please visit: www.torontosurplus.com for further details.
It contains an L15B Cylinder, Resonance Frequency: 4.5 Hz, Date Code: 0289
The black cord used is Seiscord
1 in stock
$ 60.00 US
http://www.torontosurplus.com/redirect.php?middleframe=http://www.torontosurplus.com/tes/tes70.htm
Brad
Patrike
08-25-2009, 06:14 PM
Toronto Surplus -- now runs shop from his house - just down the road from me.