The Sealey VS925 is a professional lambda sensor tester designed for diagnosing both Zirconia and Titania oxygen sensors and ECU performance. This versatile diagnostic tool is suitable for use with 1, 2, 3 and 4-wire sensors, covering both heated and unheated configurations commonly found in modern vehicle emission systems. The tester features an LED display that clearly shows the crossover signal from the sensor, enabling technicians to quickly verify sensor operation. Its simulation capability allows testing of ECU response by generating rich or lean mixture signals, making it ideal for comprehensive engine management diagnostics and fault-finding in automotive workshops. Connection is straightforward thanks to the insulation-piercing clip which allows quick attachment without damaging wiring, whilst the integrated display confirms wire identity to prevent incorrect connections. The unit includes a low battery indicator to ensure reliable operation and is powered by a 9V battery which is supplied with the tool. With compact dimensions and a weight of just 250g including battery, the VS925 is practical for mobile diagnostics and general workshop use. Features and Benefits: • Tests both Zirconia and Titania lambda sensor types for versatile workshop use • Compatible with 1, 2, 3 and 4-wire sensors, heated and unheated configurations • LED display provides clear visual indication of sensor crossover signals • ECU simulation function tests rich/lean mixture signal response • Insulation-piercing clip enables quick connection without wire damage • Wire identity display prevents incorrect connections during testing • Low battery indicator ensures reliable diagnostic results • Compact and lightweight design suitable for mobile mechanics Specifications: • Brand: Sealey • Nett Weight: 0.42kg • Battery: 9V • Operating Temperature: 10°C to 50°C • Storage Temperature: 20°C to 60°C • Size (L x W x D): 147 x 81 x 29mm • Weight (main body only): 250g (inc. battery) • Model No. VS925