1. In ambitu gasorum flammabilium et explosivorum late usus est ut oleum abusionis, expolitio, industria chemica, suggestum oleum remote, oleum amphorarum, etc. Adhibetur etiam in locis pulveris flammabilibus sicut industria militaris, portus, frumenti repositionis et metalli. processus;
2. Applicabilis ad Zonam 1 et Zonam 2 explosivae ambitus gasi;
IIA, IIB, IIC applicabilis ambitus gasorum explosivorum;
4. Locus applicabilis ad ambitum pulveris flammabiles 21 et 22;
5. Locum temperaturas coetus est t1~t4/t5/t6;
6. Overload and brevis circuit protection of the controled circuit and start and stop motor as a load, control start, stop, forward and reverse motor, etc., and also supply power to the meter.