RISH Instruments Pvt. Ltd. Manufactures Analog Insulation Tester, RISH Insu 5000 AK. RISH Instruments Pvt. Ltd offers test and measuring instruments & industrial control products. This Analog Insulation Tester has Insulation resistance Measuring ranging from 10k to 1T. It is battery operated or hand crank operated or mains operated. The wide selectable voltage range of Analog Insulation Tester includes 100V/ 250V/ 500V/ 1000V/ 1500V/ 2000V/ 2500V/ 5000V.