| Description
 The Sanwa DM509S is a portable analog insulation tester designed to measure insulation resistance in electrical lines and equipment. It applies a 500V DC test voltage and provides readings on an analog, taut-band meter display.  | 
| Key Features
 Analog display: The meter uses a taut-band meter, a sensitive analog movement that provides a clear visual indication of measurement results. Measurement modes: It offers both "one-shot" and "continuous" measurement capabilities, allowing for flexible testing methods. Auto-discharge: A built-in function automatically discharges the voltage stored in the circuit after a test, a key safety feature. Built-in voltage measurements: In addition to insulation resistance, the DM509S can also measure AC voltage up to 600V and DC voltage up to 60V. Battery check: The meter has a range for checking the status of its own battery. Safety rating: The unit is certified to IEC61010-1 and CAT.III 600V standards, and has an IP20 rating for dust protection.  |