(1) Effective insulation length of 6KV high voltage electroscope: 840mm handle length: 120mm Number of sections: 5 guard ring diameter: 55mm Contact electrode length: 40mm 

(2) Effective insulation length of 10KV high voltage electroscope: 840mm handle length: 120mm Number of sections: 5 guard ring diameter: 55mm Contact electrode length: 40mm 　

(3) Effective insulation length of 35KV high voltage electroscope: 1870mm handle length: 120mm Number of sections: 5 guard ring diameter: 57mm Contact electrode length: 50mm 　　

(4) Applicable voltage level of 110KV high voltage electroscope: 110KV return length 60cm extension length 200cm 　　

(5) Applicable voltage level of 220KV high voltage electroscope: 220KV return length 80cm extension length 300cm 　　

(6) Applicable voltage level of 500KV high voltage electroscope: 500KV return length 160cm extension length 720cm

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