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PQI 301


Non-Nuclear Asphalt Density Gauge

Discontinued
PQI 301 Non-Nuclear Asphalt Density Gauge

NOTICE: Manufacturing of the PQI 301 Non-Nuclear asphalt density gauge has been discontinued

Our intent is to support the PQI 301 for a limited time to allow for future planning by all of our customers. This page will remain published for remaining PQI 301 users who wish to refer to legacy manuals and library information. Contact our sales department or call 1-800-724-6306 / 518-370-5558 for information on our current generation PQI Non-Nuclear Asphalt Density gauge, the PQI 380.

PQI 301 Videos


PQI 301 FAQ's


  • Q: How long will the PQI 301 last on a full charge?
  • A: 8-12 hours, depending on usage.
  • Q: How long does it take to recharge the PQI 301?
  • A: 4 hours.
  • Q: Will the PQI 301 charge if the unit is plugged in, but is left “ON”?
  • A: After 10 minutes of not using the gauge, it will go into a sleep mode; after another 10 minutes it will turn off.
  • Q: Will the PQI 301 retain currently displayed information when it goes into battery saver mode?
  • A: Yes.
  • Q: Is it necessary to calibrate the PQI 301 against a known source, such as the test block? If so, how often should calibration be done?
  • A: We recommend once a year for calibration, however, it is useful to use the test block frequently to ensure the gauge is working properly in the field.
  • Q: Is the PQI 301 case waterproof?
  • A: No.
  • Q: Can the PQI 301 be used to measure core samples from a job site?
  • A: No.
  • Q: How do I get customer support for the PQI 301?
  • A: Call toll-free 1-800-724-6306 or 518-370-5558 (8:00 am – 5:00 pm EST - Monday – Friday) or Email Us
  • Q: How often should the PQI 301 be sent back to the manufacturer for check up?
  • A: It is recommended annually.
  • Q: What type of cleaning agents, if any, should be used to clean the sensor area of the PQI 301? How often?
  • A: WD-40 is a good cleaning agent. It is very important to spray the WD-40 on a rag and use on the sensor. DO NOT spray WD-40 directly on the sensor. Use when there is significant asphalt build up on the sensor. Be sure to clean the sensor after each days use.
  • Q: In the manual, what is meant by “excessive moisture”. What is considered “excessive moisture”?
  • A: Any H2O value over 10.
  • Q: Does TransTech provide training for the PQI 301?
  • A: We welcome individuals to come to the TransTech Systems facility in NY, free of charge, for training. Please call toll-free 1-800-724-6306 to arrange dates and for any additional training information.
  • Q: Is the PQI 301 availible in languages other than English?
  • A: Yes, we can also program the interface for Spanish, Dutch, German or Italian.
  • Q: What type of warranty is available with a new PQI 301?
  • A: We offer a 1 year warranty on parts and labor for issues related to materials and workmanship on all new PQI 301's.

PQI 301 Library


The specifications listed below are made available for your reference only. You are responsible for ensuring that you are using the latest and most up to date specification from your state.

The PQI 301 conforms to ASTM D7113 and AASHTO T 343-12