Ermenrich Zing ST40 Socket Tester

The Ermenrich Zing ST40 Socket Tester features a Euro plug and a dedicated button for testing RCD (residual current device) performance. The tester plugs into a socket and provides light indications via three LEDs. The light codes are printed directly on the device body, offering seven total indications: everything is in order; no ground; no neutral; missing phase; phase/ground reversed; phase/neutral reversed; phase/ground reversed and ground is missing. The tester is perfect for checking electrical installation work on a construction site and assessing the condition of outlets at home. The device has a built-in backlit screen that displays the measured voltage and does not require additional power. Key features: Voltage measurement, with results displayed on the built-in screen; Testing correct socket connection – 7 modes; Dedicated RCD test button.