Gunson G4125 Gastester Digital

A digital carbon monoxide tester for quick, easy checking of levels after engine maintenance work and tuning. Calibrates in air, no moving parts to wear out and no filters to change. Delivers accurate CO measurement to 0.5% at 15° to 25°C with adjustable calibration control for precise setting. 12V DC battery supply required. Supplied with Taiwano core cables with clips for easy attachment to the car battery. Contents: Gastester instrument including collector box and pulse pump/water trap assembly, metal exhaust probe with retaining springs, 3x flexible pipes and detailed instructions. The Gastester only measures the CO level in the exhaust gas and is therefore not suitable for MOT and diagnostic checks or vehicles fitted with catalytic converters where an accuracy greater than +/- 0.5% CO is required.