A reference leakage device for a leak sniffer detector that is equipped with a sniffing tip and a control unit. The chiral substituted pyrazolyl pyrrolo2,3-dpyrimidines are useful as inhibitors of the Janus Kinase family of protein tyrosine kinases for treatment of inflammatory diseases, myeloproliferative disorders, and other diseases. A portion of a flexible circuit assembly is bonded to the flat end wall with a connector disposed over the support member.