The Extech 380363-NIST Digital Handheld High Voltage Insulation Tester offers autoranging insulation resistance measurements up to 10G? as well as manual data logging capable of storing up to 9 data sets. Tests at three voltages ranging from 250V, 500V, and 1000V.
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 
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Replaced by VFM200 - no temp & humidity