CO Warning Meter testo 315-2 testo 315-2 ideal to test the CO level in ambient air. Even low concentrations of the highly poisonous gas are detected. In this way, you can judge wh [...] ansehen     CO-Meter testo 315-1 testo 315-1 suitable for all the measurement functions needed to service gas heating systems. While measuring draught, differential pressure , tempera [...] ansehen     Accessories testo 815 / 816 Technical especificatios: - Sound level calibrator - Battery type: 9V block battery - Operating time: [...] ansehen     testo 317-3 The testo 317-3 CO monitor detects the presence of carbon monoxide in the surrounding area and warns the user both visually and audibly about dangerou [...] ansehen     testo 815 / 816 Practical sound level meters in accordance with DIN/IEC 60651, accuracy class 2 L. Common features of both meters: - Accuracy class 2 L [...] ansehen