Carbon Monoxide Monitor TPI 770, A must for all gas engineers Ambient CO monitor TPI 770 CO analyser as new, still with protective screen film attached•Measure CO from O to 999ppm•Displays the max. CO reading in PPM since power on•Displays in hours and minutes, time elapsed since power on•Displays user set value of audible and visual alarm•The audible alarm can be switched on and off by pressing the SEL button•The 770 is a state-of-the-art carbon monoxide instrument designed to measure CO in ambient air. This palm-sized unit displays readings in 1ppm incrementsSize 38.5mm x 152.0mm x 70.0mm Weight 181.5g Sensor 2 year life Electrochemica Range 0 to 999ppm Accuracy ±3ppm or 5% whichever is greater Temperature 32 °F to 104 °F (0 °C to 40 °C) Batteries 2 x 1.5v size AA Alkaline Operating Time 300 hours No box and instructions a little tatty, but the unit is new and unused. £45.00, Bath,.
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