vibration recorders for transmission lines

[hechengli]

does anyone know about the currently available vibration recorder for tranmission lines?
Pavica, Sefag, scolar and hilda?
I heard only pavica and sefag are available now days. I would appreciate if anyone let me know their websites. I know pavica already. Thanks a lot!

 

[jbartos]

Suggestion: Visit

http://www.thomasregister.com

and type Vibration Indicating & Recording Instruments under Product or Service, which will return 32 companies to approach to