The MHG 385 Heat Detector is a self-acting detector of the Electric Fire Detection and Alarm System LITES intended for the automatic fire alarm signalling (rising fire) as a detector responding to an increased temperature rising before or during a fire.

The MHG 385 Detector is manufactured in so-called voltage characteristic. It is especially intended for environs with explosion hazard, namely in cooperation with the Control and Indicating Equipments (C.I.E.) MHU 106, MHU 108, MHU 113, MHU 109, MHU 110 and MHU 111. With the MHU 106 C.I.E. the MHG 385 Detector may be used in connection with the JSM-5 loop. The connection to the addressable MHU 109 C.I.E., or to the analog MHU 110 (MHU 111) C.I.E. is to make by the help of the MHY 409 Addressing Unit. The connection to a fire loop is to carry out by means of the MHY 703 Mounting Base, eventually by means of the MHY 713 Mounting Base in environments without explosion hazard. As parallel signalling the signal lamps MHS 409, MHS 408 (MHS 405, MHS 407) can be used.

The detector may work:

• in environments with combustible gas or vapours explosion hazard according to ČSN 33 2320
• in environments with combustible dust explosion hazard according to ČSN 33 2330
• in environments with explosion hazard of explosives according to ČSN 33 2340

The detectors are produced in these versions:

• MHG 385.058 – conforms to the A2 class of the ČSN EN 54-5 standard
• MHG 385.059 - conforms to the B class of the ČSN EN 54-5 standard

For its use in the Electric Fire Detection and Alarm System the detector is liable to the conformity examination according to law No. 22/1997 Sb., in wording law No. 71/2000 Sb. and the relevant orders of the government. For the use in explosion hazard environs the detector is liable to the homologation of the FTZÚ Ostrava - Radvanice A0 210.

The detector is intended for a plant with safety arrangement in terms of ČSN EN 60950.