This monitor meets OSHA accuracy requirements for 8 hour TWA and 15 minute STEL sampling of ethylene oxide. Includes prepaid analysis. Important Note: Effective immediately, the address this monitor is sent to for prepaid analysis has changed, the new address is: B.I.C. Chemistry Department, 11001 Hampshire Ave. S., Mpls., MN 55438 The 3M™ Ethylene Oxide Monitor 3550, with Pr