Jaycar Resettable Tacho & Hour Meter – IP68 Waterproof, Up to 60,000 RPM

A seized compressor on a Friday afternoon costs you more than the meter that would've told you it was due. This inductive tacho and hour meter plugs into your spark plug lead, needs no battery, and reads up to 60,000 RPM with ±10 RPM accuracy while the engine runs. Switches to an hour counter the moment it stops. IP68 rated, so salt spray, dust, and a hose-down won't touch it. Set your spark count from 1 to 8 per revolution to match your engine. The 1.6 m lead wraps around a plug wire and grounds out. Done. Mount it on a boat, a truck dash, or a compressor panel and stop gambling with rebuild costs. Add to cart and have it reading hours by Monday

• Reads up to 60,000 RPM (±10 RPM accuracy) and 99,999 hours
• IP68 waterproof and dustproof – suited to boats, trucks, compressors
• No battery required; powers from the spark plug wire
• User-adjustable spark setting: 1–8 sparks per revolution
• 1.6 m lead connects to ground and wraps around a spark plug lead
• Dimensions: 71 mm (W) × 41 mm (H)