We are the manufacturer, supplier and exporter of heat transfer lab equipments in natural convection. S.s. Cylindrical tube a. Diameter :40mm b. Length :400mm 02.measuring instruments a. Digital voltmeter range :0 to 300 v b. Digital ammeter & range :0 to 10 amp sc. Digital temperature indicator with selector switch range :ambient to 199.9 deg. C 03. Thermocouples: a. Type :cr. Ai b. Length :1 mtr. 05. Electronic dimmer :1 no.