Flame Proof Temperature Indicator operates on a power supply of 230 VAC +/- 10% at a frequency rate of 50 Hz. The Temperature Indicator is made using quality grade components that ensure optimum performance for longer period of time. The Temperature Indicator is offered in flame proof construction and is featured with dimensional stability. Flame Proof Temperature Indicator is available in different models with single or double, three set points that are separately adjustable for each channel.