Welcome to The Inexpensive Seismometer Project,
an attempt reduce the cost and complexity of amateur
This page is about my project to build simpler and less expensive amateur short period seismometers by using microprocessors and other new chips, such as switched capacitor filters. Short period seismometers are useful for detecting and analyzing local seismic activity (within a few hundred miles or closer). For more general information on other types of seismometers and links to web resources, see my main seismometer page. Click here for information on my long period system.
November 2005 QM system board status:
Beta test systems have been sent to Panama, Los Angeles, Nevada, Spokane, and Portugal.
See for latest updates to this page.
Here is my latest QM-4.5-ADXL103 strong-motion, single-board, single-channel accelerometer design :
OPTIONS: You may want to consider a serial (DB9 M/F) extension cable if you want to bury the geophone to reduce background noise pickup. The QM-4.5-ADXL105 has a built-in serial cable that is about 10 ft long, and a cable to the geophone that is about 6 ft long. I have some serial extension cables that are 10 ft ($10), 25 ft ($20), 50 ft ($30), and 100 ft ($50) long.
MAIL ORDERS: For a QM-4.5-ADXL105 strong motion seismometer that is ready to run with the free Amaseis computer program, you will need both the electronics board and an ADXK105 accelerometer chip on a DIP carrier board:
___Complete accelerometer unit in case for RF and thermal shielding:
NOT AVAILABLE: 1 QM-4.5-ADXL103 Assembled/tested pcb, diecast enclosure, 10 ft cable, QM-ADXL103 on DIP adapter @ $295
1 Shipping within the US is by USPS Priority Mail @ $25
NOT AVAILABLE: To order, mail a check or money order payable to Infiltec to:
Infiltec Seismometers 108 South Delphine Avenue Waynesboro, VA 22980 Phone: 540-943-2776 Fax: 540-932-3025Email: Infiltec.
NOT AVAILABLE: INTERNATIONAL ORDERS: determine your shipping cost from the USPS International Shipping Calculator. Select your country, assuming a single box less than 1 ft3 in size and a shipping weight of two pounds (1 kg) per seismometer. Let me know if you want to make other shipping arrangements.
AVAILABLITY: It generally takes about two-four weeks to build and test your system, after I receive your order.
WARRANTY: Your money back if you are not satisfied for any reason. Just return the system in reasonable shape for a full refund. If the system is defective, please ship it back for a no-charge repair.
TUNE UP: Any time I make improvements to the microprocessor firmware and/or circuit, you can return your board for these upgrades for $30.
This page copyright © 2001-2011 by Infiltec Inc., all rights reserved. It was last updated on August 19, 2011.