CHQ-SZM2/DIN(SCI) Single Zone Monitor - DIN Enclosure with SCICHQ SZM2 DIN(SCI) Single Zone Monitor DIN Enclosure with SCI Manufactured by Hochiki, this Hochiki CHQ SZM2 DIN (SCI) Single Zone Monitor Din Enclosure with SCI is a Single Zone Monitor designed to allow up to 6 conventional detectors to be interfaced to Hochikis ESP analogue addressable system. The unit is supplied as a DIN Rail mountable version but a boxed module version is also available. Both models feature an integral short circuit isolator. The