Model GST   Resistance range  1 Mohm to 1 Tohm Tolerance to 0.5 % TC to 25 ppm / °C max. Voltage to 6000 V Power to 2 W           Model CHS   Resistance range  10 Mohm to 100 Gohm Tolerance to 0.5 % TC to 25 ppm / °C max. Voltage to 6000 V Power  to 0.8 W             Model CHR   Resistance range  1 ohm to 10 Mohm Tolerance to 0.5 % TC to 50 ppm / °C max. Voltage bis 600 V Power bis 0.25 W