Specification: Electrical heating, with a Heater and Energy Regulator, Suitable for operation on 230 V, 50Hz, Single Phase, A.C. supply. Each unit is supplied with bath of heat resistant
glass and the following.
Tapered Rings    2 Nos.
Steel Ball, of 9.5mm dia.    2 Nos.
 Ring Holder    1 No.
Electric Heater (Hot Plate)    1 No.
Essential Accessories:
Thermometer IP 60° C, Range : -2° C to 80° C
 Range: 30° C to 200°C

Ltekonline are the manufacturers of Ring and Ball Apparatus (Electrical) used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Bitumen Asphalt Testing Lab Equipment for Engineering Teaching Lab in Universities