The level control relays RM35 LM33MW and RM35 LV14MW control one or two levels, filling or draining function:. RM35 LM33MW: control by resistive level sensor. RM35 LV14MW: control by On\/Off sensor. Fitted with a clear hinged front flap to prevent any accidental alteration of settings. LED display of output status. Fitting on DIN Rail.Mounting Style = DIN Rail MountSupply Voltage = 20.4 - 264 V ac\/dcOverall Length = 76mmOverall Width = 35mmOverall Depth = 90mmMinimum Operating Temperature = -20°CMaximum Operating Temperature = +50°C