Welcome to The Inexpensive Seismometer Project,
an attempt reduce the cost and complexity of amateur
seismic systems.
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:
PRICES
___Complete accelerometer unit in case for RF and thermal shielding:
1 QM-4.5-ADXL103 Assembled/tested pcb, diecast enclosure, 10 ft cable, QM-ADXL103 on DIP adapter @ $149
___Parts/Options:
1 QM-4.5 Assembled/tested pcb, no enclosure, no ADXL103, with 10 ft cable @ $99
1 QM-ADXL103 accelerometer chip mounted on a carrier DIP board, plugs into QM-4.5 @ $30
1 L-15B Mark Products 4.5 Hz Geophone (used but working), works in QM-4.5 when ADXL103 not plugged in @ $40
___Shipping:
1 Shipping within the US is by USPS Priority Mail @ $5
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To order, mail a check or money order payable to Infiltec to:
Infiltec Seismometers PO Box 8202 Falls Church, VA 22041-8202 Phone: 703-820-7696 Fax: 703-671-9350Email: .
CREDIT CARD/PAYPAL ORDERS: you can order by credit card (MV/VISA/AMEX) pr PayPal by printing out our Order Form(text) or Order Form(Word) and faxing it back to 703-671-9350.
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.
PAYPAL ORDERS: (for orders shipping within the US only)
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.
LATEST IMPROVEMENTS:
051101: laid out proto QM-4.5 board and had some made - debugging
051029: replaced ADXL202 by ADXL103 for lower noise and simpler interface with QM-4.5 pcb
This page copyright © 2001-2005 by , all rights reserved. It was created by , and last updated on November 9, 2005.
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