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for leakage testing of air conditioners that have been filled for test purposes with forming gas (forming gas = mixture of 5% Hydrogen H2 + 95% Nitrogen N) allows quick and reliable leakage detection microprocessor control with advanced digital signal processing tricolor LED bar indicator adjustable sensitivity low battery indication semiconductor gas sensor flexible stainless probe, length: 40 cm automatic zeroing and compensating of ambient concentration sensitivity: less than 5 ppm alarm method: buzzer, LED bar battery life: approx. 7 hours (normal use) automatic turn-off batteries: 4 pcs. AA size dimensions: 173 x 66 x 56 mm weight approx. 400 g warm-up time: approx. 45 sec. operating temperature: 0 - 40°C accessories: 4 pcs. batteries (AA), user manual, carry case Technical data Gross weight 1110 g CE Standard Yes