CONVENIENT Full 100% money back guarantee if not completely satisfied. Orders are shipped promptly. We accept Mastercard, Visa, American Express, and electronic checks through our secure online store. EMT chemical vapor monitors / monitoring badges can be used for either TWA or STEL sampling. Our staff of experienced industrial hygienists is available if you have a problem. Laboratory results can be available within 48 hours by fax or email with prior request. RELIABLE Patented badges are analyzed using OSHA & NIOSH validated methods AIHA accredited laboratory Rated proficient in the NIOSH Proficiency Analysis Testing Program (PAT) for the analytes tested EMT has been providing outstanding monitoring programs since 1979. PROVEN TECHNOLOGY Badge results have been accepted as valid in U.S. Federal Court Meets OSHA and NIOSH accuracy requirements for compliance testing PERFORMANCE CRITERIA Accuracy Better than +25% at the 95% confidence interval Limits of Detection Lower - Generally better than 1/10 of the PEL Upper - At least 2 times the PEL Shelf Life One year at room temperature - guaranteed (refrigeration recommended for Glutaraldehyde badges) EMT is a member of the Nashville Better Business Bureau